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  • Keep Learning After Your Oracle Training Class is Over - Save 50%!

    - by KJones
    Written by Amit Kumar, Senior Director Oracle University Digital Training        Every training class you take about the latest Oracle application or technology moves you closer to developing the skills you need to succeed. But after class is over, how do you keep up with today’s accelerating pace of innovation? To   To keep with the very latest technological advances, you need an ongoing and flexible training solution.       One that lets you learn during your own downtime.       Knowledge that’s easy to access.       Interactive lessons where you connect with experts.       A simple way to increase your knowledge, on your own time and at your own pace. The new Oracle Learning Streams is the flexible training solution you're looking for. Continuously Learn with Oracle Learning Streams Over time, Oracle Learning Streams help you develop the depth and breadth of knowledge that will give you the tools to become an expert in your field. By taking advantage of comprehensive and frequently updated information, you can keep learning continuously, at your own pace, when it's convenient for you. Sign up today and get 12 months of unlimited access to: •    Hundreds of videos delivered by Oracle experts for fresh and continuous product learning•    Live connections with Oracle's top instructors•    Robust video search capability to find exactly what you’re looking for•    Features that allow you to build your own custom learning queue and request new content Oracle Learning Streams are now available for Oracle Database and Oracle Middleware. Take a moment to preview the content now.  For a Limited Time - Save 50% For a limited time, save 50% when you order Oracle Learning Streams with any other Oracle Classroom, Live Virtual Class or Training On Demand course. Now there is no reason for learning to stop when class is over!

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  • What to "CRM" in San Francisco? CRM Highlights for OpenWorld '12

    - by Richard Lefebvre
    There is plenty to SEE for CRM during OpenWorld in San Francisco, September 30 - October 4! Here are some of the sessions in the CRM Track that you might want to consider attending for products you currently own or might consider for the future. I think you'll agree, there is quite a bit of investment going on across Oracle CRM. Please use OpenWorld Schedule Builder or check the OpenWorld Content Catalog for all of the session details and any time or location changes. Tip: Pre-enrolled session registrants via Schedule Builder are allowed into the session rooms before anyone else, so Schedule Builder will guarantee you a seat. Many of the sessions below will likely be at capacity. General Session: Oracle Fusion CRM—Improving Sales Effectiveness, Efficiency, and Ease of Use (Session ID: GEN9674) - Oct 2, 11:45 AM - 12:45 PM. Anthony Lye, Senior VP, Oracle leads this general session focused on Oracle Fusion CRM. Oracle Fusion CRM optimizes territories, combines quota management and incentive compensation, integrates sales and marketing, and cleanses and enriches data—all within a single application platform. Oracle Fusion can be configured, changed, and extended at runtime by end users, business managers, IT, and developers. Oracle Fusion CRM can be used from the Web, from a smartphone, from Microsoft Outlook, or from an iPad. Deloitte, sponsor of the CRM Track, will also present key concepts on CRM implementations. Oracle Fusion Customer Relationship Management: Overview/Strategy/Customer Experiences/Roadmap (CON9407) - Oct 1, 3:15PM - 4:15PM. In this session, learn how Oracle Fusion CRM enables companies to create better sales plans, generate more quality leads, and achieve higher win rates and find out why customers are adopting Oracle Fusion CRM. Gain a deeper understanding of the unique capabilities only Oracle Fusion CRM provides, and learn how Oracle’s commitment to CRM innovation is driving a wide range of future enhancements. Oracle RightNow CX Cloud Service Vision and Roadmap (CON9764) - Oct 1, 10:45 AM - 11:45 AM. Oracle RightNow CX Cloud Service combines Web, social, and contact center experiences for a unified, cross-channel service solution in the cloud, enabling organizations to increase sales and adoption, build trust, strengthen relationships, and reduce costs and effort. Come to this session to hear from Oracle experts about where the product is going and how Oracle is committed to accelerating the pace of innovation and value to its customers. Siebel CRM Overview, Strategy, and Roadmap (CON9700) - Oct 1, 12:15PM - 1:15PM. The world’s most complete CRM solution, Oracle’s Siebel CRM helps organizations differentiate their businesses. Come to this session to learn about the Siebel product roadmap and how Oracle is committed to accelerating the pace of innovation and value for its customers on this platform. Additionally, the session covers how Siebel customers can leverage many Oracle assets such as Oracle WebCenter Sites; InQuira, RightNow, and ATG/Endeca applications, and Oracle Policy Automation in conjunction with their current Siebel investments. Oracle Fusion Social CRM Strategy and Roadmap: Future of Collaboration and Social Engagement (CON9750) - Oct 4, 11:15 AM - 12:15 PM. Social is changing the customer experience! Come find out how Oracle can help you know your customers better, encourage brand affinity, and improve collaboration within your ecosystem. This session reviews Oracle’s social media solution and shows how you can discover hidden insights buried in your enterprise and social data. Also learn how Oracle Social Network revolutionizes how enterprise users work, collaborate, and share to achieve successful outcomes. Oracle CRM On Demand Strategy and Roadmap (CON9727) - Oct 1, 10:45AM - 11:45AM. Oracle CRM On Demand is a powerful cloud-based customer relationship management solution. Come to this session to learn directly from Oracle experts about future product plans and hear how Oracle is committed to accelerating the pace of innovation and value to its customers. Knowledge Management Roadmap and Strategy (CON9776) - Oct 1, 12:15PM - 1:15PM. Learn how to harness the knowledge created as a natural byproduct of day-to-day interactions to lower costs and improve customer experience by delivering the right answer at the right time across channels. This session includes an overview of Oracle’s product roadmap and vision for knowledge management for both the Oracle RightNow and Oracle Knowledge (formerly InQuira) product families. Oracle Policy Automation Roadmap: Supercharging the Customer Experience (CON9655) - Oct 1, 12:15PM - 1:15PM. Oracle Policy Automation delivers rapid customer value by streamlining the capture, analysis, and deployment of policies across every facet of the customer experience. This session discusses recent Oracle Policy Automation enhancements for policy analytics; the latest Oracle Policy Automation Connector for Siebel; and planned new capabilities, including availability with the Oracle RightNow product line. There is much more, so stay tuned for more highlights or check out the Content Catalog and search for your areas of interest. 

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  • Transitioning from Chemical engineering to software industry what to do??

    - by console cowboy
    Hello all. Currently I am in my last semester of Engineering & has made my mind to switch to software field but given my knowledge of programming limited only to C. I am confused what to do next.Currently i have two choices. Get good at C, learn Python & write some good code/Apps & increase my employability chances. Do some Java/.Net certifications to increase my employability chances? Any kind of advice/suggestion is highly welcomed. P.S:I am also good at Linux & have a above average knowledge of operating systems. P.p.s: Advice from Indian Programmers would be beneficial.

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  • Maven profile properties are not "overriding"

    - by Nazar
    I have Maven multi-module project with such structure: parent-pom-project -- module1 -- module2 At the parent-pom-project I have such pom.xml <modules> <module>module1</module> </modules> ... <profiles> <profile> <id>local</id> <properties> <prop>local_prop</prop> </properties> </profile> <profile> <id>test</id> <modules> <module>module2</module> </modules> <properties> <prop>test_prop</prop> </properties> </profile> </profiles> At all pom.xml files I have such tag: <build> <resources> <resource> <directory>src/main/resources</directory> <filtering>true</filtering> </resource> <resource> <directory>src/test/resources</directory> <filtering>true</filtering> </resource> </resources> </build> At module1 and module2 in resource directory I have properties files with such text: prop=${prop} The problem is that after mvn clean install or mvn clean install -Ptest or even mvn clean install -P test I get prop=local_prop If I user test profile for build module2 is also builded, but properties are used from local profile. I use Maven 3.0.3. Anybody have any ideas?

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  • How do I interview Front-end focused web developers?

    - by Civilian
    For the first time I'm in the position where I'm helping interview potential front-end developers. (The other interviewer is more business & PM-focused, although he is a former developer.) I probe for knowledge and background in css, js, and other related technologies, but those questions are really just testing for lingo. I feel that it'd be unfair to ask very specific questions about css when we're not infront of a computer, because my style of programming css is a lot of guesswork. I've also been given websites that these web developers have written-- is that enough to go on for interviewing front-ends? We're also looking for general aptitude, rather than a databank of knowledge.

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  • Keeping up to date with PeopleSoft Global Payroll Singapore legislative changes

    - by Carolyn Cozart
    Amendments to the Central Provident Fund contribution rates were announced in June 2011. The contribution rate changes will go into effect September 2011. To find out  the details of what is changing in Global Payroll Singapore as well as targeted delivery dates, please visit the Knowledge Center on Support.Oracle.com. Click on the Knowledge tab. Simply type in keywords ‘Global Payroll Singapore Position’. If further amendments are made, we will revise the document accordingly.  Let the Oracle/PeopleSoft team help reduce the stress and anxiety of these changing times by staying informed. PeopleSoft is working hard to get you the information you need. The information is just a few clicks away.

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  • Novice developer

    - by Shrikant
    Sir. I'm a student of B.Tech final year from the CSE branch. I'm using Ubuntu since the last 3 years. It gave me a lot of knowledge. So now I want to repay Ubuntu back by developing some apps for Ubuntu, but I don't know which language I should choose: Java, C or C++ or something else. So please, guide me how to start. I have intermediate knowlegde of C, C++ , Java & Linux scripts. So in which language should i start? I don't have any live software development knowledge so explain me everything. Thank you

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  • Hacking Smart Phones

    Rootkits used to show smart phones can be hacked, hijacked and exploited without their owner's knowledge Operating system - Shopping - Consumer Electronics - Communications - Wireless

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  • New and Noteworthy Fixed Assets Notes

    - by Oracle_EBS
    A new white paper for Integrating Oracle Inventory Transactions Into Oracle Projects To Generate Asset Lines & Interface Assets To Fixed Assets (Doc ID 1392743.1) A listing of available Oracle E-Business Fixed Assets Diagnostics (Doc ID 1362875.1) Information on the knowledge management enhancements made in My Oracle Support Knowledge Management Version 6.0 Release (Doc ID 1393516.1) The new Period Close Advisor for the Release 12 E-Business Suite (Doc ID 335.1).  What is the Period Close Advisor?  The Period Close Advisor provides guidance on recommended period end procedures for E-Business Release 12.x.  It is intended to be generic and does not relate to a specific organization or industry.  Step by step best practices with tips and troubleshooting references are provided to assist you through each phase.  The EBS R12 Period Close Advisor for Assets data can also be found in a standalone note (Doc ID 1359475.1)

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  • Mobile My Oracle Support 6.3 Release is live!

    - by JanSyss
    We have released Mobile My Oracle Support 6.3 last Saturday (13-Oct-2012), including 10 enhancements and almost 40 bug fixes. Mobile My Oracle Support is My Oracle Support's webapplication optimized for mobile devices to manage your Service Requests, your On Demand Requests for Change (RFCs), search over Support's Knowledge Base, Bug database or Sun System Handbook, and to manage your pending user requests (CUA). You can find the application at http://support.oracle.mobi  or get redirected from http://support.oracle.com when using a mobile device. Overall Several UI optimizations in different screens. Service Request Area Show the platinum icon for Platinum SRs and the restore status for Platinum Sev 1s. Email send with Share functionality now contains links to Mobile MOS and Full Site. Knowledge Management Area Ability in Advanced Search to search the Sun System Handbook (cfr. screenshot below) Better rendering of the KB documents to avoid where possible horizontal scrolling. Don't hesitate to share your feedback and comments or even requests.

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  • oracle certification

    - by Victor
    I am a j2ee developer with 6+ yrs of experience. I have scjp1.4 and scwcd 1.4. To puruse my dream of becoming an architect, I wish to round out my knowledge and make my knowledge base broader. To that respect, I have decided to take the 1Z0-047 Oracle Database SQL Expert Exam as a first step. My questions are: What is a good book/resource for this? Should I follow this website http://www.sql-ex.ru/certification/certification.php Also after completing this ceritificate, will I get a physical certificate that I will put on my resume?

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  • What are good HTML 5 and PHP 5 books to get? [closed]

    - by lardtard
    I am looking for beginner books into PHP 5 (Maybe with a bit into MySQL?) and HTML 5. I started self-teaching myself PHP although it has become a problem as the tutorials online are either outdated or just crap. I also managed to start learning with very little HTML knowledge so I am looking to brush up on my HTML knowledge and get more into PHP. I also am unsure weather I should be looking into XHTML or HTML5, or both so an answer to that would be splendid. I just want to become more self-sufficient and less reliant on other for my programming needs. I've searched Google for books but I'm just not sure which one is the "best" for me and makes for good practice and habits which brings me here.

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  • Remote Diagnostic Agent (RDA) version 4.30

    - by inowodwo
    posted by Maurice Bauhahn Remote Diagnostic Agent (RDA) version 4.30 was released on December 11th A free download can be accessed via Knowledge Management article 314422.1 and installed in any Enterprise Performance Management 11.1.2.x environment. EPM-specific instructions are available in Knowledge Management article 1304885.1. This RDA version incorporates two new modules (EAS=Essbase Administration Services; HWA=Hyperion Web Analysis) and improvements in modules and profiles relating to twelve other Hyperion applications (EPM, EPMA, ESS, FCM, HFM, HFR, HIR, HPL, HPSV, HSS, PR, and HSV). To follow best practice, run related RDA profiles [for example: "perl rda.pl -vnSCRPp Hyperion1112_EAS"] and attach the output zip file [by default in \rda\output\] to your service requests. The comprehensive set of details provided in such output files should help technicians to avoid delays in handling service requests (by avoiding ping-pong communications resulting from repeated requests for additional values).

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  • Dynamically loading modules in Python (+ threading question)

    - by morpheous
    I am writing a Python package which reads the list of modules (along with ancillary data) from a configuration file. I then want to iterate through each of the dynamically loaded modules and invoke a do_work() function in it which will spawn a new thread, so that the code runs in a separate thread. At the moment, I am importing the list of all known modules at the beginning of my main script - this is a nasty hack I feel, and is not very flexible, as well as being a maintenance pain. This is the function that spawns the threads. I will like to modify it to dynamically load the module when it is encountered. The key in the dictionary is the name of the module containing the code: def do_work(work_info): for (worker, dataset) in work_info.items(): #import the module defined by variable worker here... t = threading.Thread(target=worker.do_work, args=[dataset]) # I'll NOT dameonize since spawned children need to clean up on shutdown # Since the threads will be holding resources #t.daemon = True t.start() Question 1 When I call the function in my script (as written above), I get the following error: AttributeError: 'str' object has no attribute 'do_work' Which makes sense, since the dictionary key is a string (name of the module to be imported). When I add the statement: import worker before spawning the thread, I get the error: ImportError: No module named worker This is strange, since the variable name rather than the value it holds are being used - when I print the variable, I get the value (as I expect) whats going on? Question 2 As I mentioned in the comments section, I realize that the do_work() function written in the spawned children needs to cleanup after itself. My understanding is to write a clean_up function that is called when do_work() has completed successfully, or an unhandled exception is caught - is there anything more I need to do to ensure resources don't leak or leave the OS in an unstable state? Question 3 If I comment out the t.daemon flag statement, will the code stil run ASYNCHRONOUSLY?. The work carried out by the spawned children are pretty intensive, and I don't want to have to be waiting for one child to finish before spawning another child. BTW, I am aware that threading in Python is in reality, a kind of time sharing/slicing - thats ok Lastly is there a better (more Pythonic) way of doing what I'm trying to do?

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  • Introduction to Agile Development

    - by Grant Fritchey
    Even though my current job is a little weird, I still consider myself to be a DBA. I didn’t start that way in IT. I came through support and into development. I loved development. There was a constant struggle to attempt to improve your code, your understanding, and, most importantly, the process of development itself. Development can be slow and tedious. Left alone, developers can simply disappear to build a project and not come back for two years, at which time they deliver it. But, maybe that software isn’t what you wanted, or it’s no longer needed, or who knows what. So developers are constantly attempting to improve their processes in order to deliver more relavent software quicker (something DBAs could learn about). I really admire it. One of the many processes that has come out of that constant striving is known as Agile. As the name implies, Agile development attempts to come up with a quick, fast turning, business aware, well, for want of a word, agile, process that is more responsive to the needs of the business. There are tons and tons of books and blogs and videos on the subject that can get you going. But, Agile isn’t easy (note, Easy is not part of the name). Agile processes can be hard. I’ve worked on multiple agile teams, some successful, some not. The two principal differences between the teams were their discipline and their knowledge of the process. Discipline, that comes from within. But knowledge, ah, well there I can help. Red Gate is bringing a series of free instructional events to the United States in a few weeks time focused primarily on SQL Server (click here right now to register while there’s still space). We’re also offering some .NET instruction too. That’s a full day, free, with top experts in the business. But, the next day, there’s a full day session introducing Agile. You can go to this and learn how to do Agile. Develop that knowledge that will enable you to successfully use the Agile process. Go to this web site to check it out. No, this event is not free, but not everything can be. And it’s not just for developers. DBAs, you need to learn this stuff too. Management could also benefit from understanding these processes (because you guys can help to enforce discipline). It’s really for everyone involved in the development process.

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  • Does Your Business Really Need a Search Engine Optimization Specialist?

    If you're an individual or an organization planning to employ a search engine optimization professional, you might first want to consider the possibility of doing this work yourself. Certainly, a search engine optimization consultant can boost your site and perhaps help save you time and effort, yet the fact is that SEO is hardly an advanced science, and there are just a handful of authentic professionals within the field. So, if you depend on somebody else to be in charge of your search engine optimization, there's a high probability that the person will not possess a great deal more knowledge than you. And if you lack any knowledge, all the relevant information is easy to obtain.

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  • How do you manage all of the information you have learned and found? [closed]

    - by B Seven
    Possible Duplicate: How do you manage your knowledge base? What do you use for personal note taking to keep track of everything you learn? Are you always Googling or searching StackOverflow to answer the same questions? Or searching for and copying and pasting existing code? I feel like I have a poor memory, especially remembering things like syntax. Are there any knowledge management systems that would work well for a programming language or operating system? It would be great if there were a way to save everything I learn in an easy to search system. Does such a thing exist? Maybe you would be able to search by question (How to sort an array?, How to set static IP?), or by tag (sort, array, enumeration, iterator, IP). I know it would be easy to develop my own system, but I thought it would be great to learn what works for other people.

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  • need expert guideline on learning java?

    - by user75222
    I am a 3rd year university student in computer science. My goal is to become a very good Developer in JAVA. I have made 2 of my university projects in java. I have a newbie knowledge about JAVA and i also have good skills in Object oriented programming concepts. But i zero knowledge in networking no desktop applications. So, I decided to try some open source projects. read them thoroughly and practice on them. I am looking for advice from where to start? any suggestions?

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  • Sharepoint Error: [COMException (0x80004005): Cannot complete this action.

    - by ifunky
    Hi, I've created a site basic definition that uses different master and default pages. Everything works quite well except for whenever I create a new site based on the definition I receive the following error when browsing to the new site: [COMException (0x80004005): Cannot complete this action. Please try again.] Please try again.] Microsoft.SharePoint.Library.SPRequestInternalClass.GetFileAndMetaInfo(String bstrUrl, Byte bPageView, Byte bPageMode, Byte bGetBuildDependencySet, String bstrCurrentFolderUrl, Boolean& pbCanCustomizePages, Boolean& pbCanPersonalizeWebParts, Boolean& pbCanAddDeleteWebParts, Boolean& pbGhostedDocument, Boolean& pbDefaultToPersonal, String& pbstrSiteRoot, Guid& pgSiteId, UInt32& pdwVersion, String& pbstrTimeLastModified, String& pbstrContent, Byte& pVerGhostedSetupPath, UInt32& pdwPartCount, Object& pvarMetaData, Object& pvarMultipleMeetingDoclibRootFolders, String& pbstrRedirectUrl, Boolean& pbObjectIsList, Guid& pgListId, UInt32& pdwItemId, Int64& pllListFlags, Boolean& pbAccessDenied, Guid& pgDocId, Byte& piLevel, UInt64& ppermMask, Object& pvarBuildDependencySet, UInt32& pdwNumBuildDependencies, Object& pvarBuildDependencies, String& pbstrFolderUrl, String& pbstrContentTypeOrder) +0 Microsoft.SharePoint.Library.SPRequest.GetFileAndMetaInfo(String bstrUrl, Byte bPageView, Byte bPageMode, Byte bGetBuildDependencySet, String bstrCurrentFolderUrl, Boolean& pbCanCustomizePages, Boolean& pbCanPersonalizeWebParts, Boolean& pbCanAddDeleteWebParts, Boolean& pbGhostedDocument, Boolean& pbDefaultToPersonal, String& pbstrSiteRoot, Guid& pgSiteId, UInt32& pdwVersion, String& pbstrTimeLastModified, String& pbstrContent, Byte& pVerGhostedSetupPath, UInt32& pdwPartCount, Object& pvarMetaData, Object& pvarMultipleMeetingDoclibRootFolders, String& pbstrRedirectUrl, Boolean& pbObjectIsList, Guid& pgListId, UInt32& pdwItemId, Int64& pllListFlags, Boolean& pbAccessDenied, Guid& pgDocId, Byte& piLevel, UInt64& ppermMask, Object& pvarBuildDependencySet, UInt32& pdwNumBuildDependencies, Object& pvarBuildDependencies, String& pbstrFolderUrl, String& pbstrContentTypeOrder) +219 [SPException: Cannot complete this action. Please try again.] I'm able to work around this by checking out the new master page and checking it back in again and after doing so there are no further issues at all. Any ideas to what could cause this? Thanks Dan ONET.XML module section: <Modules> <Module Name="CustomMasterPage" List="116" Url="_catalogs/masterpage" RootWebOnly="FALSE"> <File Url="Shoes.master" Type="GhostableInLibrary" IgnoreIfAlreadyExists="TRUE" /> </Module> <Module Name="Default" List="116" Url=""> <File Url="default.aspx" Name="default.aspx" NavBarHome="True" IgnoreIfAlreadyExists="FALSE"> <AllUsersWebPart WebPartZoneID="Left" WebPartOrder="1"> &lt;webParts&gt;&lt;webPart xmlns="http://schemas.microsoft.com/WebPart/v3"&gt;&lt;metaData&gt;&lt;type name="BCM.SharePoint.Shoes.ShoesComponents.FooterLinks, BCM.SharePoint.Shoes.ShoesComponents, Version=1.0.0.0, Culture=neutral, PublicKeyToken=2881713f39360b71" /&gt;&lt;importErrorMessage&gt;Cannot import this Web Part.&lt;/importErrorMessage&gt;&lt;/metaData&gt;&lt;data&gt;&lt;properties&gt;&lt;property name="AllowClose" type="bool"&gt;True&lt;/property&gt;&lt;property name="Width" type="string" /&gt;&lt;property name="MyProperty" type="string"&gt;Hello SharePoint&lt;/property&gt;&lt;property name="AllowMinimize" type="bool"&gt;True&lt;/property&gt;&lt;property name="AllowConnect" type="bool"&gt;True&lt;/property&gt;&lt;property name="ChromeType" type="chrometype"&gt;None&lt;/property&gt;&lt;property name="TitleIconImageUrl" type="string"&gt;/_layouts/images/BCM_SharePoint_Shoes/wp_FooterLinks.gif&lt;/property&gt;&lt;property name="Description" type="string"&gt;FooterLinks Description&lt;/property&gt;&lt;property name="Hidden" type="bool"&gt;False&lt;/property&gt;&lt;property name="TitleUrl" type="string" /&gt;&lt;property name="AllowEdit" type="bool"&gt;True&lt;/property&gt;&lt;property name="Height" type="string" /&gt;&lt;property name="MissingAssembly" type="string"&gt;Cannot import this Web Part.&lt;/property&gt;&lt;property name="HelpUrl" type="string" /&gt;&lt;property name="Title" type="string" /&gt;&lt;property name="CatalogIconImageUrl" type="string"&gt;/_layouts/images/BCM_SharePoint_Shoes/wp_FooterLinks.gif&lt;/property&gt;&lt;property name="Direction" type="direction"&gt;NotSet&lt;/property&gt;&lt;property name="ChromeState" type="chromestate"&gt;Normal&lt;/property&gt;&lt;property name="AllowZoneChange" type="bool"&gt;True&lt;/property&gt;&lt;property name="AllowHide" type="bool"&gt;True&lt;/property&gt;&lt;property name="HelpMode" type="helpmode"&gt;Modeless&lt;/property&gt;&lt;property name="ExportMode" type="exportmode"&gt;All&lt;/property&gt;&lt;/properties&gt;&lt;/data&gt;&lt;/webPart&gt;&lt;/webParts&gt; </AllUsersWebPart> <AllUsersWebPart WebPartZoneID="Left" WebPartOrder="0"> &lt;webParts&gt;&lt;webPart xmlns="http://schemas.microsoft.com/WebPart/v3"&gt;&lt;metaData&gt;&lt;type name="BCM.SharePoint.Shoes.ShoesComponents.SubFooterLinks, BCM.SharePoint.Shoes.ShoesComponents, Version=1.0.0.0, Culture=neutral, PublicKeyToken=2881713f39360b71" /&gt;&lt;importErrorMessage&gt;Cannot import this Web Part.&lt;/importErrorMessage&gt;&lt;/metaData&gt;&lt;data&gt;&lt;properties&gt;&lt;property name="AllowClose" type="bool"&gt;True&lt;/property&gt;&lt;property name="Width" type="string" /&gt;&lt;property name="MyProperty" type="string"&gt;Hello SharePoint&lt;/property&gt;&lt;property name="AllowMinimize" type="bool"&gt;True&lt;/property&gt;&lt;property name="AllowConnect" type="bool"&gt;True&lt;/property&gt;&lt;property name="ChromeType" type="chrometype"&gt;None&lt;/property&gt;&lt;property name="TitleIconImageUrl" type="string"&gt;/_layouts/images/BCM_SharePoint_Shoes/wp_SubFooterLinks.gif&lt;/property&gt;&lt;property name="Description" type="string"&gt;Shoes home page links (under the hero image)&lt;/property&gt;&lt;property name="Hidden" type="bool"&gt;False&lt;/property&gt;&lt;property name="TitleUrl" type="string" /&gt;&lt;property name="AllowEdit" type="bool"&gt;True&lt;/property&gt;&lt;property name="Height" type="string" /&gt;&lt;property name="MissingAssembly" type="string"&gt;Cannot import this Web Part.&lt;/property&gt;&lt;property name="HelpUrl" type="string" /&gt;&lt;property name="Title" type="string" /&gt;&lt;property name="CatalogIconImageUrl" type="string"&gt;/_layouts/images/BCM_SharePoint_Shoes/wp_SubFooterLinks.gif&lt;/property&gt;&lt;property name="Direction" type="direction"&gt;NotSet&lt;/property&gt;&lt;property name="ChromeState" type="chromestate"&gt;Normal&lt;/property&gt;&lt;property name="AllowZoneChange" type="bool"&gt;True&lt;/property&gt;&lt;property name="AllowHide" type="bool"&gt;True&lt;/property&gt;&lt;property name="HelpMode" type="helpmode"&gt;Modeless&lt;/property&gt;&lt;property name="ExportMode" type="exportmode"&gt;All&lt;/property&gt;&lt;/properties&gt;&lt;/data&gt;&lt;/webPart&gt;&lt;/webParts&gt; </AllUsersWebPart> <NavBarPage Name="$Resources:core,nav_Home;" ID="1002" Position="Start" /> <NavBarPage Name="$Resources:core,nav_Home;" ID="0" Position="Start" /> </File> </Module> </Modules> LOG OUTPUT: 05/21/2010 12:22:55.11 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 72nz Medium Videntityinfo::isFreshToken reported failure. 05/21/2010 12:22:55.19 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services Fields 88yv Medium Creating default lists 05/21/2010 12:22:55.19 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 72lp Medium Creating directory Lists 05/21/2010 12:22:55.26 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services Fields 88yf Medium Creating list "Master Page Gallery" in web "http://mmm-dev-ll/sites/Shoes/test" at URL "_catalogs/masterpage", (setuppath: "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\Template\global\lists\mplib") 05/21/2010 12:22:55.28 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services Fields 88y1 Medium No document templates uploaded for list "Master Page Gallery" -- none found for list template "100". 05/21/2010 12:22:55.28 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 72kc Medium Failed to find generic XML file at "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\Template\xml\onet.xml", falling back to global site definition. 05/21/2010 12:22:56.22 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services Fields 88yz Medium Creating default modules at URL "http://mmm-dev-ll/sites/Shoes/test" 05/21/2010 12:22:56.22 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 8e27 Medium Ensuring module folder _catalogs/masterpage 05/21/2010 12:22:56.89 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 72h7 Medium Applying template "SubSite#1" to web at URL "http://mmm-dev-ll/sites/Shoes/test". 05/21/2010 12:22:57.09 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services Fields 88yy Medium Activating web-scoped features for template "SubSite#1" at URL "http://mmm-dev-ll/sites/Shoes/test" 05/21/2010 12:22:57.12 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 8l1c Medium Preparing 20 features for activation 05/21/2010 12:22:57.14 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 8l1d Medium Feature Activation: Batch Activating Features at URL http://mmm-dev-ll/sites/Shoes/test 'AnnouncementsList' (ID: '00bfea71-d1ce-42de-9c63-a44004ce0104'), 'ContactsList' (ID: '00bfea71-7e6d-4186-9ba8-c047ac750105'), 'CustomList' (ID: '00bfea71-de22-43b2-a848-c05709900100'), 'DataSourceLibrary' (ID: '00bfea71-f381-423d-b9d1-da7a54c50110'), 'DiscussionsList' (ID: '00bfea71-6a49-43fa-b535-d15c05500108'), 'DocumentLibrary' (ID: '00bfea71-e717-4e80-aa17-d0c71b360101'), 'EventsList' (ID: '00bfea71-ec85-4903-972d-ebe475780106'), 'GanttTasksList' (ID: '00bfea71-513d-4ca0-96c2-6a47775c0119'), 'GridList' (ID: '00bfea71-3a1d-41d3-a0ee-651d11570120'), 'IssuesList' (ID: '00bfea71-5932-4f9c-ad71-1557e5751100'), 'LinksList' (ID: '00bfea71-2062-426c-90bf-714c59600103'), 'NoCodeWorkflowLibrary' (ID: '00bfe... 05/21/2010 12:22:57.14* w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 8l1d Medium ...a71-f600-43f6-a895-40c0de7b0117'), 'PictureLibrary' (ID: '00bfea71-52d4-45b3-b544-b1c71b620109'), 'SurveysList' (ID: '00bfea71-eb8a-40b1-80c7-506be7590102'), 'TasksList' (ID: '00bfea71-a83e-497e-9ba0-7a5c597d0107'), 'WebPageLibrary' (ID: '00bfea71-c796-4402-9f2f-0eb9a6e71b18'), 'workflowProcessList' (ID: '00bfea71-2d77-4a75-9fca-76516689e21a'), 'WorkflowHistoryList' (ID: '00bfea71-4ea5-48d4-a4ad-305cf7030140'), 'XmlFormLibrary' (ID: '00bfea71-1e1d-4562-b56a-f05371bb0115'), 'TeamCollab' (ID: '00bfea71-4ea5-48d4-a4ad-7ea5c011abe5'), . 05/21/2010 12:22:57.15 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 8l1f Medium Feature Activation: Batch Activated Features at URL http://mmm-dev-ll/sites/Shoes/test 'AnnouncementsList' (ID: '00bfea71-d1ce-42de-9c63-a44004ce0104'), 'ContactsList' (ID: '00bfea71-7e6d-4186-9ba8-c047ac750105'), 'CustomList' (ID: '00bfea71-de22-43b2-a848-c05709900100'), 'DataSourceLibrary' (ID: '00bfea71-f381-423d-b9d1-da7a54c50110'), 'DiscussionsList' (ID: '00bfea71-6a49-43fa-b535-d15c05500108'), 'DocumentLibrary' (ID: '00bfea71-e717-4e80-aa17-d0c71b360101'), 'EventsList' (ID: '00bfea71-ec85-4903-972d-ebe475780106'), 'GanttTasksList' (ID: '00bfea71-513d-4ca0-96c2-6a47775c0119'), 'GridList' (ID: '00bfea71-3a1d-41d3-a0ee-651d11570120'), 'IssuesList' (ID: '00bfea71-5932-4f9c-ad71-1557e5751100'), 'LinksList' (ID: '00bfea71-2062-426c-90bf-714c59600103'), 'NoCodeWorkflowLibrary' (ID: '00bfea... 05/21/2010 12:22:57.15* w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 8l1f Medium ...71-f600-43f6-a895-40c0de7b0117'), 'PictureLibrary' (ID: '00bfea71-52d4-45b3-b544-b1c71b620109'), 'SurveysList' (ID: '00bfea71-eb8a-40b1-80c7-506be7590102'), 'TasksList' (ID: '00bfea71-a83e-497e-9ba0-7a5c597d0107'), 'WebPageLibrary' (ID: '00bfea71-c796-4402-9f2f-0eb9a6e71b18'), 'workflowProcessList' (ID: '00bfea71-2d77-4a75-9fca-76516689e21a'), 'WorkflowHistoryList' (ID: '00bfea71-4ea5-48d4-a4ad-305cf7030140'), 'XmlFormLibrary' (ID: '00bfea71-1e1d-4562-b56a-f05371bb0115'), 'TeamCollab' (ID: '00bfea71-4ea5-48d4-a4ad-7ea5c011abe5'), . 05/21/2010 12:22:57.15 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 88jb Medium Feature Activation: Activating Feature 'RadEditorFeatureRichText' (ID: '747755cd-d060-4663-961c-9b0cc43724e9') at URL http://mmm-dev-ll/sites/Shoes/test. 05/21/2010 12:22:57.15 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 75fb Medium Calling 'FeatureActivated' method of SPFeatureReceiver for Feature 'RadEditorFeatureRichText' (ID: '747755cd-d060-4663-961c-9b0cc43724e9'). 05/21/2010 12:22:57.20 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 75f8 Medium Feature Activation: Feature 'RadEditorFeatureRichText' (ID: '747755cd-d060-4663-961c-9b0cc43724e9') was activated at URL http://mmm-dev-ll/sites/Shoes/test. 05/21/2010 12:22:57.51 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services Fields 88yv Medium Creating default lists 05/21/2010 12:22:57.51 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 72lp Medium Creating directory Lists 05/21/2010 12:22:57.51 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services Fields 88yz Medium Creating default modules at URL "http://mmm-dev-ll/sites/Shoes/test" 05/21/2010 12:22:57.51 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 8e27 Medium Ensuring module folder _catalogs/masterpage 05/21/2010 12:22:57.56 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 72ix Medium Not enough information to determine a list for module "Default". Assuming no list for this module. 05/21/2010 12:22:57.87 w3wp.exe (0x1E40) 0x18A4 Windows SharePoint Services General 72h8 Medium Successfully applied template "SubSite#1" to web at URL "http://mmm-dev-ll/sites/Shoes/test". 05/21/2010 12:22:59.48 w3wp.exe (0x1E40) 0x0980 Windows SharePoint Services General 8e2s Medium Unknown SPRequest error occurred. More information: 0x80070057 05/21/2010 12:23:07.06 OWSTIMER.EXE (0x0884) 0x106C Office Server Setup and Upgrade 8u3j High Registry key value {SearchThrottled} was not found under registry hive {Software\Microsoft\Office Server\12.0}. Assuming search sku is not throttled. 05/21/2010 12:23:07.08 OWSTIMER.EXE (0x0884) 0x106C Search Server Common MS Search Administration 90gf Medium SQL: dbo.proc_MSS_PropagationGetQueryServers 05/21/2010 12:23:07.09 OWSTIMER.EXE (0x0884) 0x106C Search Server Common MS Search Administration 8wni High Resuming default catalog with reason 'GPR_PROPAGATION' for application 'SharedServices1'... 05/21/2010 12:23:07.11 OWSTIMER.EXE (0x0884) 0x106C Search Server Common MS Search Administration 8wnj High Resuming anchor text catalog with reason GPR_PROPAGATION' for application 'SharedServices1'... 05/21/2010 12:23:07.14 OWSTIMER.EXE (0x0884) 0x106C Search Server Common MS Search Administration 8dvl Medium Search application '3c6751cc-37b0-470a-bfa2-bfd0b5635fe1': Provision start addresses in default content source. 05/21/2010 12:23:07.15 OWSTIMER.EXE (0x0884) 0x106C Search Server Common MS Search Administration 7hmh High exception in SearchUpgradeProvisioner Keyword Config System.InvalidOperationException: jobServerSearchServiceInstance is null at Microsoft.Office.Server.Search.Administration.SearchUpgradeProvisioner..ctor(SearchServiceInstance searchServiceInstance) at Microsoft.Office.Server.Search.Administration.OSSPrimaryGathererProject.ProvisionContentSources() 05/21/2010 12:23:29.19 OWSTIMER.EXE (0x0884) 0x0FFC SharePoint Portal Server Business Data 79bv High Initiating BDC Cache Invalidation Check in AppDomain 'DefaultDomain' 05/21/2010 12:23:29.19 OWSTIMER.EXE (0x0884) 0x0FFC SharePoint Portal Server Business Data 79bx High Completed BDC Cache Invalidation Check in AppDomain 'DefaultDomain' 05/21/2010 12:23:45.84 OWSTIMER.EXE (0x0884) 0x08A8 SharePoint Portal Server SSO 8inc Medium In SSOService::Synch(), sso database conn string: 05/21/2010 12:23:50.80 OWSTIMER.EXE (0x0884) 0x0F14 Excel Services Excel Services Administration 8tqi Medium ExcelServerSharedWebApplication.Synchronize: Starting synchronize for instance of Excel Services in SSP 'SharedServices1'. 05/21/2010 12:23:50.80 OWSTIMER.EXE (0x0884) 0x0F14 Excel Services Excel Services Administration 8tqj Medium ExcelServerSharedWebApplication.Synchronize: Successfully synchronized instance of Excel Services in SSP 'SharedServices1'. 05/21/2010 12:23:52.31 w3wp.exe (0x1E40) 0x0980 SharePoint Portal Server Runtime 8gp7 Medium Topology cache updated. (AppDomain: /LM/W3SVC/1963195510/Root-1-129188762904047141)

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  • Followup: Python 2.6, 3 abstract base class misunderstanding

    - by Aaron
    I asked a question at Python 2.6, 3 abstract base class misunderstanding. My problem was that python abstract base classes didn't work quite the way I expected them to. There was some discussion in the comments about why I would want to use ABCs at all, and Alex Martelli provided an excellent answer on why my use didn't work and how to accomplish what I wanted. Here I'd like to address why one might want to use ABCs, and show my test code implementation based on Alex's answer. tl;dr: Code after the 16th paragraph. In the discussion on the original post, statements were made along the lines that you don't need ABCs in Python, and that ABCs don't do anything and are therefore not real classes; they're merely interface definitions. An abstract base class is just a tool in your tool box. It's a design tool that's been around for many years, and a programming tool that is explicitly available in many programming languages. It can be implemented manually in languages that don't provide it. An ABC is always a real class, even when it doesn't do anything but define an interface, because specifying the interface is what an ABC does. If that was all an ABC could do, that would be enough reason to have it in your toolbox, but in Python and some other languages they can do more. The basic reason to use an ABC is when you have a number of classes that all do the same thing (have the same interface) but do it differently, and you want to guarantee that that complete interface is implemented in all objects. A user of your classes can rely on the interface being completely implemented in all classes. You can maintain this guarantee manually. Over time you may succeed. Or you might forget something. Before Python had ABCs you could guarantee it semi-manually, by throwing NotImplementedError in all the base class's interface methods; you must implement these methods in derived classes. This is only a partial solution, because you can still instantiate such a base class. A more complete solution is to use ABCs as provided in Python 2.6 and above. Template methods and other wrinkles and patterns are ideas whose implementation can be made easier with full-citizen ABCs. Another idea in the comments was that Python doesn't need ABCs (understood as a class that only defines an interface) because it has multiple inheritance. The implied reference there seems to be Java and its single inheritance. In Java you "get around" single inheritance by inheriting from one or more interfaces. Java uses the word "interface" in two ways. A "Java interface" is a class with method signatures but no implementations. The methods are the interface's "interface" in the more general, non-Java sense of the word. Yes, Python has multiple inheritance, so you don't need Java-like "interfaces" (ABCs) merely to provide sets of interface methods to a class. But that's not the only reason in software development to use ABCs. Most generally, you use an ABC to specify an interface (set of methods) that will likely be implemented differently in different derived classes, yet that all derived classes must have. Additionally, there may be no sensible default implementation for the base class to provide. Finally, even an ABC with almost no interface is still useful. We use something like it when we have multiple except clauses for a try. Many exceptions have exactly the same interface, with only two differences: the exception's string value, and the actual class of the exception. In many exception clauses we use nothing about the exception except its class to decide what to do; catching one type of exception we do one thing, and another except clause catching a different exception does another thing. According to the exception module's doc page, BaseException is not intended to be derived by any user defined exceptions. If ABCs had been a first class Python concept from the beginning, it's easy to imagine BaseException being specified as an ABC. But enough of that. Here's some 2.6 code that demonstrates how to use ABCs, and how to specify a list-like ABC. Examples are run in ipython, which I like much better than the python shell for day to day work; I only wish it was available for python3. Your basic 2.6 ABC: from abc import ABCMeta, abstractmethod class Super(): __metaclass__ = ABCMeta @abstractmethod def method1(self): pass Test it (in ipython, python shell would be similar): In [2]: a = Super() --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /home/aaron/projects/test/<ipython console> in <module>() TypeError: Can't instantiate abstract class Super with abstract methods method1 Notice the end of the last line, where the TypeError exception tells us that method1 has not been implemented ("abstract methods method1"). That was the method designated as @abstractmethod in the preceding code. Create a subclass that inherits Super, implement method1 in the subclass and you're done. My problem, which caused me to ask the original question, was how to specify an ABC that itself defines a list interface. My naive solution was to make an ABC as above, and in the inheritance parentheses say (list). My assumption was that the class would still be abstract (can't instantiate it), and would be a list. That was wrong; inheriting from list made the class concrete, despite the abstract bits in the class definition. Alex suggested inheriting from collections.MutableSequence, which is abstract (and so doesn't make the class concrete) and list-like. I used collections.Sequence, which is also abstract but has a shorter interface and so was quicker to implement. First, Super derived from Sequence, with nothing extra: from abc import abstractmethod from collections import Sequence class Super(Sequence): pass Test it: In [6]: a = Super() --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /home/aaron/projects/test/<ipython console> in <module>() TypeError: Can't instantiate abstract class Super with abstract methods __getitem__, __len__ We can't instantiate it. A list-like full-citizen ABC; yea! Again, notice in the last line that TypeError tells us why we can't instantiate it: __getitem__ and __len__ are abstract methods. They come from collections.Sequence. But, I want a bunch of subclasses that all act like immutable lists (which collections.Sequence essentially is), and that have their own implementations of my added interface methods. In particular, I don't want to implement my own list code, Python already did that for me. So first, let's implement the missing Sequence methods, in terms of Python's list type, so that all subclasses act as lists (Sequences). First let's see the signatures of the missing abstract methods: In [12]: help(Sequence.__getitem__) Help on method __getitem__ in module _abcoll: __getitem__(self, index) unbound _abcoll.Sequence method (END) In [14]: help(Sequence.__len__) Help on method __len__ in module _abcoll: __len__(self) unbound _abcoll.Sequence method (END) __getitem__ takes an index, and __len__ takes nothing. And the implementation (so far) is: from abc import abstractmethod from collections import Sequence class Super(Sequence): # Gives us a list member for ABC methods to use. def __init__(self): self._list = [] # Abstract method in Sequence, implemented in terms of list. def __getitem__(self, index): return self._list.__getitem__(index) # Abstract method in Sequence, implemented in terms of list. def __len__(self): return self._list.__len__() # Not required. Makes printing behave like a list. def __repr__(self): return self._list.__repr__() Test it: In [34]: a = Super() In [35]: a Out[35]: [] In [36]: print a [] In [37]: len(a) Out[37]: 0 In [38]: a[0] --------------------------------------------------------------------------- IndexError Traceback (most recent call last) /home/aaron/projects/test/<ipython console> in <module>() /home/aaron/projects/test/test.py in __getitem__(self, index) 10 # Abstract method in Sequence, implemented in terms of list. 11 def __getitem__(self, index): ---> 12 return self._list.__getitem__(index) 13 14 # Abstract method in Sequence, implemented in terms of list. IndexError: list index out of range Just like a list. It's not abstract (for the moment) because we implemented both of Sequence's abstract methods. Now I want to add my bit of interface, which will be abstract in Super and therefore required to implement in any subclasses. And we'll cut to the chase and add subclasses that inherit from our ABC Super. from abc import abstractmethod from collections import Sequence class Super(Sequence): # Gives us a list member for ABC methods to use. def __init__(self): self._list = [] # Abstract method in Sequence, implemented in terms of list. def __getitem__(self, index): return self._list.__getitem__(index) # Abstract method in Sequence, implemented in terms of list. def __len__(self): return self._list.__len__() # Not required. Makes printing behave like a list. def __repr__(self): return self._list.__repr__() @abstractmethod def method1(): pass class Sub0(Super): pass class Sub1(Super): def __init__(self): self._list = [1, 2, 3] def method1(self): return [x**2 for x in self._list] def method2(self): return [x/2.0 for x in self._list] class Sub2(Super): def __init__(self): self._list = [10, 20, 30, 40] def method1(self): return [x+2 for x in self._list] We've added a new abstract method to Super, method1. This makes Super abstract again. A new class Sub0 which inherits from Super but does not implement method1, so it's also an ABC. Two new classes Sub1 and Sub2, which both inherit from Super. They both implement method1 from Super, so they're not abstract. Both implementations of method1 are different. Sub1 and Sub2 also both initialize themselves differently; in real life they might initialize themselves wildly differently. So you have two subclasses which both "is a" Super (they both implement Super's required interface) although their implementations are different. Also remember that Super, although an ABC, provides four non-abstract methods. So Super provides two things to subclasses: an implementation of collections.Sequence, and an additional abstract interface (the one abstract method) that subclasses must implement. Also, class Sub1 implements an additional method, method2, which is not part of Super's interface. Sub1 "is a" Super, but it also has additional capabilities. Test it: In [52]: a = Super() --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /home/aaron/projects/test/<ipython console> in <module>() TypeError: Can't instantiate abstract class Super with abstract methods method1 In [53]: a = Sub0() --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /home/aaron/projects/test/<ipython console> in <module>() TypeError: Can't instantiate abstract class Sub0 with abstract methods method1 In [54]: a = Sub1() In [55]: a Out[55]: [1, 2, 3] In [56]: b = Sub2() In [57]: b Out[57]: [10, 20, 30, 40] In [58]: print a, b [1, 2, 3] [10, 20, 30, 40] In [59]: a, b Out[59]: ([1, 2, 3], [10, 20, 30, 40]) In [60]: a.method1() Out[60]: [1, 4, 9] In [61]: b.method1() Out[61]: [12, 22, 32, 42] In [62]: a.method2() Out[62]: [0.5, 1.0, 1.5] [63]: a[:2] Out[63]: [1, 2] In [64]: a[0] = 5 --------------------------------------------------------------------------- TypeError Traceback (most recent call last) /home/aaron/projects/test/<ipython console> in <module>() TypeError: 'Sub1' object does not support item assignment Super and Sub0 are abstract and can't be instantiated (lines 52 and 53). Sub1 and Sub2 are concrete and have an immutable Sequence interface (54 through 59). Sub1 and Sub2 are instantiated differently, and their method1 implementations are different (60, 61). Sub1 includes an additional method2, beyond what's required by Super (62). Any concrete Super acts like a list/Sequence (63). A collections.Sequence is immutable (64). Finally, a wart: In [65]: a._list Out[65]: [1, 2, 3] In [66]: a._list = [] In [67]: a Out[67]: [] Super._list is spelled with a single underscore. Double underscore would have protected it from this last bit, but would have broken the implementation of methods in subclasses. Not sure why; I think because double underscore is private, and private means private. So ultimately this whole scheme relies on a gentleman's agreement not to reach in and muck with Super._list directly, as in line 65 above. Would love to know if there's a safer way to do that.

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  • Installing a clean Python 2.6 on SuSE (SLES) 11 using system-wide libraries

    - by optilude
    Hi, I've spent most of the day on this, and it is driving me absolutely insane. On all other Unixes I've used, this is a walk in the park, but SLES 11 has me dumbfounded. I need to build Zope on SLES 11 64 bit: Linux <name> 2.6.27.45-0.1-default #1 SMP 2010-02-22 16:49:47 +0100 x86_64 x86_64 x86_64 GNU/Linux I first tried to just use the YaST-installed Python 2.6. I've also installed python-devel, libjpeg-devel, readline-devel, libopenssl-devel, libz2-devel, zlib-devel, and libgcrypt-devel. The global python2.6 has a lot of cruft in it, and seems to execute stuff in /etc/pythonstart when I use it, which doesn't help. However, the error I get is this: Getting distribution for 'Zope2==2.12.3'. src/AccessControl/cAccessControl.c:596: warning: initialization from incompatible pointer type src/AccessControl/cAccessControl.c:598: warning: ‘intargfunc’ is deprecated src/AccessControl/cAccessControl.c:598: warning: initialization from incompatible pointer type src/AccessControl/cAccessControl.c:599: warning: ‘intargfunc’ is deprecated src/AccessControl/cAccessControl.c:599: warning: initialization from incompatible pointer type src/AccessControl/cAccessControl.c:600: warning: ‘intintargfunc’ is deprecated src/AccessControl/cAccessControl.c:600: warning: initialization from incompatible pointer type src/AccessControl/cAccessControl.c:601: warning: initialization from incompatible pointer type src/AccessControl/cAccessControl.c:602: warning: initialization from incompatible pointer type src/AccessControl/cAccessControl.c:606: warning: ‘intargfunc’ is deprecated src/AccessControl/cAccessControl.c:606: warning: initialization from incompatible pointer type /usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../x86_64-suse-linux/bin/ld: skipping incompatible /usr/lib/libpython2.6.so when searching for -lpython2.6 /usr/lib64/gcc/x86_64-suse-linux/4.3/../../../../x86_64-suse-linux/bin/ld: cannot find -lpython2.6 collect2: ld returned 1 exit status error: Setup script exited with error: command 'gcc' failed with exit status 1 An error occured when trying to install Zope2 2.12.3. Look above this message for any errors that were output by easy_install. I don't know what "incompatible" is referring to here; my guess would be the hardware architecture, but I'm not sure what's incompatible with what in the statement above. I've had problems with system-installed Pythons before, so I tried to compile my own (hence the list of -devel packages above), downloading the Python 2.6 tarball and running: ./configure --disable-tk --prefix=${HOME}/python make make install This installs, but it seems to be unable to find any system-wide libraries. Here's a sample interpreter session: Python 2.6.5 (r265:79063, Mar 29 2010, 17:04:12) [GCC 4.3.2 [gcc-4_3-branch revision 141291]] on linux2 Type "help", "copyright", "credits" or "license" for more information. Traceback (most recent call last): File "/etc/pythonstart", line 7, in <module> import readline ImportError: No module named readline >>> from hashlib import md5 Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/osc/python-2.6/lib/python2.6/hashlib.py", line 136, in <module> md5 = __get_builtin_constructor('md5') File "/home/osc/python-2.6/lib/python2.6/hashlib.py", line 63, in __get_builtin_constructor import _md5 ImportError: No module named _md5 Both readline and hashlib (via libgrypt) should be installed, and the relevant -devel packages are also installed. On Ubuntu or OS X, this works just fine. On SuSE, no luck. Any help greatly appreciated! Martin

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