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  • What framework for text rating site?

    - by problemofficer
    I want to start a "rate my"-style site. The rated objects are mostly texts. I want it to be rather simple. Features I need: object rating (thumb up, thumb down) object comments object tags related object presentation based on tags user authentication and management private message system sanity checks for text inputs (i.e. prevention of code injections) cache open source runs on GNU/Linux I would gladly take something that is tailored for my scenario but a generic framework would be fine too. I simply don't want to write stuff like user authentication that is been written a million times and risking security flaws. Programming language is irrelevant but python/php preferred.

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  • What should I learn next?

    - by Krysten
    I am a CS major. I've taken 2 courses in C (Intro to C and CS1) and 1 introductory course to OOP with Java. I really like Java and feel that I have a firm understanding of OOP concepts. I am really interested in web development and would like to learn a programming language that can be used to build dynamic web applications. My question is what language should I learn? I've narrowed it down to python or ruby. Also, I want to learn a programming language that will help me get a job upon graduating. So essentially, I will use this particular language to build applications that will help me get a job in the future.

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  • What encryption algorithm/package should I use in a betting game type situation?

    - by user299648
    I have a betting type site where I publish a number (between 0-100) that is encrypted. Then after a period of time, I would review what the number is and prove it with a key to decrypt the encrypted number to prove that I'm not cheating. I also want it to be easily verifiable by an average user. What encryption algorithm/technique/package should I use? I'm no expert on cryptography. There seems to be so many options out there and I'm not sure what to use. python friendly is a plus.

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  • How can I add a custom item to the Sound Indicator?

    - by con-f-use
    One of the strength of Unity are the various standardized indicators. I want to customize the sound indicator with an additional menu entry that runs a small shell script. I'm not afraid of a little Python code and I hope someone can point me to the right subroutine in the right file. I suspect that will be fairly easy but all the indicators are just so bloated that I can't look through their code in a reasonable time. Any help is appreciated. I know it is possible as the marvelous Skype-Wrapper does it.

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  • Any idea of what to do with an old PC?

    - by phineas
    I got an old PC for free, similar to that one. Additionlly, I'm a hobbyist programmer who does mainly python and java under a linux (mostly ubuntu) development environment. And now I wonder what I could do with such a piece of crappy hardware and would be pleased to get a good answer. It's one thing if you code your app that could run on almost any pc (or webbrowser) but another if you got an own hardware platform which you could extend or more generally customize the way you like. What I would like to hear from you: Are you in a similar situation? Have you already done a project like that? What would be your ideas?

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  • Want to learn a new language. Not sure which to pick.

    - by Regravity
    I've been coding in Batch, VBS and AutoIt for AGES, and while its been great and I've made some pretty complex desktop applications in AutoIt, I'd like to advance to something that is more flexible / powerful. I've found that I really love programming desktop applications to solve a wide variety of problems which is what I've been doing with AutoIt. I've done a lot of research on different languages, but I'm torn between a few, namely C++, C# and Python. Can anyone suggest which language I should tackle next? And reasons why I should?

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  • What can I learn to build a (kind of) recommendation system?

    - by lsmagalhaes
    I'm learning how to develop an android app (nothing serious, just for learning and fun), so I devised the following goal: an app that learns with users actions and, some time later, starts to suggest some useful things. For example: The user add some notes daily, in the morning, and mark some of them as done generally on thursdays and sundays, at evening. Based on that behaviour and the relation of the notes marked as done, the app will prioritize notes that are more propense to be marked, and avoid notifying in days where no note is marked. This is a silly example but I think it ilustrates well what I want to do. I know this is a matter of machine learning, but I don't know where I should start learning. To anyone interested, I'm build a backend in Python, so any libraries or frameworks in this language are very welcome. The frontend, by the way, is sencha touch + phonegap.

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  • How to elegantly work with a lot of print functions?

    - by user1824372
    I'm working on a Python project that is executed on a terminal (or console) for which I am planning to implement a GUI. I did not major in CS so I really have no idea how to effectively design a terminal GUI such that: the user interface looks good in GUI, it is directed to a certain widget, let's say, a text label, or a bottom bar, or a hide-able frame. Do you have any suggestions? Currently, I am using the print function to provide essential information on STDOUT during execution, so a lot of print calls are distributed here and there in the code. I'm thinking of using macro-like variables such as 'FILE_NOT_EXISTS_MESSAGE' for printing, and all of them and their values would be defined in one file. Is that a standard way to do this? Should I introduce a logging system? In summary, I'm looking for a pattern for handling console output that is effective and adaptable.

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  • What languages should I learn before I go to college? [closed]

    - by CLUEL3SS
    I've been working with PHP, MySQL, and some html for the past 3-4 years now just as a hobby. I'm only 19 and college is going to come soon, I want to go for Web and Software development and/or Network Security and Administration, I know the networking is a whole different ballpark, but as for programming, which languages do you suggest I get under my belt before college? I was thinking the C languages (C++, C#), Java, .NET; Should I learn any more Server Side Scripting languages? Python, Perl, Ruby? I used to be somewhat familiar with writing Java, but haven't written in Java in a good while, what would you suggest? Thanks!

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  • What languages should I leaarn before I go to college? [closed]

    - by CLUEL3SS
    I've been working with PHP, MySQL, and some html for the past 3-4 years now just as a hobby.. I'm only 19 and college is going to come soon, I want to go for Web and Software development and/or Network Security and Administration, I know the networking is a whole different ballpark, but as for programming, which languages do you suggest I get under my belt before college? I was thinking the C languages (C++, C#), Java, .NET; Should I learn any more Server Side Scripting languages? Python, Perl, Ruby? I used to be somewhat familiar with writing Java, but haven't written in Java in a good while, what would you suggest? Thanks!

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  • SFINAE + sizeof = detect if expression compiles

    - by FredOverflow
    I just found out how to check if operator<< is provided for a type. template<class T> T& lvalue_of_type(); template<class T> T rvalue_of_type(); template<class T> struct is_printable { template<class U> static char test(char(*)[sizeof( lvalue_of_type<std::ostream>() << rvalue_of_type<U>() )]); template<class U> static long test(...); enum { value = 1 == sizeof test<T>(0) }; typedef boost::integral_constant<bool, value> type; }; Is this trick well-known, or have I just won the metaprogramming Nobel prize? ;) EDIT: I made the code simpler to understand and easier to adapt with two global function template declarations lvalue_of_type and rvalue_of_type.

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  • Understanding the singleton class when aliasing a instance method

    - by Backo
    I am using Ruby 1.9.2 and the Ruby on Rails v3.2.2 gem. I am trying to learn Metaprogramming "the right way" and at this time I am aliasing an instance method in the included do ... end block provided by the RoR ActiveSupport::Concern module: module MyModule extend ActiveSupport::Concern included do # Builds the instance method name. my_method_name = build_method_name.to_sym # => :my_method # Defines the :my_method instance method in the including class of MyModule. define_singleton_method(my_method_name) do |*args| # ... end # Aliases the :my_method instance method in the including class of MyModule. singleton_class = class << self; self end singleton_class.send(:alias_method, :my_new_method, my_method_name) end end "Newbiely" speaking, with a search on the Web I came up with the singleton_class = class << self; self end statement and I used that (instead of the class << self ... end block) in order to scope the my_method_name variable, making the aliasing generated dynamically. I would like to understand exactly why and how the singleton_class works in the above code and if there is a better way (maybe, a more maintainable and performant one) to implement the same (aliasing, defining the singleton method and so on), but "the right way" since I think it isn't so.

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  • Problems with tk85.dll when shutting down an application that embeds the Python interpreter.

    - by George Edison
    My C++ application embeds the Python interpreter, but seems to be having some trouble when it shuts down. Right after the main window closes, I get a segmentation fault (this is Windows, but we'll call it a segmentation fault anyway). The stack trace is below: #0 102AD580 tk85!Tk_MainWindow() (C:\Users\Nathan\Documents\Projects\PowerPad 1.3\bin\Debug\lib\tk85.dll:??) #1 103082DD tk85!XSetStipple() (C:\Users\Nathan\Documents\Projects\PowerPad 1.3\bin\Debug\lib\tk85.dll:??) #2 102214A3 ??() (C:\Users\Nathan\Documents\Projects\PowerPad 1.3\bin\Debug\lib\tk85.dll:??) #3 10220000 ??() (??:??) #4 00000000 ??() (??:??) Where would I even begin to debug this problem?

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  • Storing hierarchical (parent/child) data in Python/Django: MPTT alternative?

    - by Parand
    I'm looking for a good way to store and use hierarchical (parent/child) data in Django. I've been using django-mptt, but it seems entirely incompatible with my brain - I end up with non-obvious bugs in non-obvious places, mostly when moving things around in the tree: I end up with inconsistent state, where a node and its parent will disagree on their relationship. My needs are simple: Given a node: find its root find its ancestors find its descendants With a tree: easily move nodes (ie. change parent) My trees will be smallish (at most 10k nodes over 20 levels, generally much much smaller, say 10 nodes with 1 or 2 levels). I have to think there has to be an easier way to do trees in python/django. Are there other approaches that do a better job of maintaining consistency?

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  • Parsing HTML with Python 2.7 - HTMLParser, SGMLParser, or Beautiful Soup?

    - by Eric Wilson
    I want to do some screen-scraping with Python 2.7, and I have no context for the differences between HTMLParser, SGMLParser, or Beautiful Soup. Are these all trying to solve the same problem, or do they exist for different reasons? Which is simplest, which is most robust, and which (if any) is the default choice? Also, please let me know if I have overlooked a significant option. Edit: I should mention that I'm not particularly experienced in HTML parsing, and I'm particularly interested in which will get me moving the quickest, with the goal of parsing HTML on one particular site.

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  • Blogger (Python) API: How do I retrieve a post by post ID?

    - by larsks
    Having previously obtained a post ID from a call to gdata.blogger.client.add_post()... post = client.add_post(...) post_id = post.get_post_id() ...how do I use that post id to retrieve the post in the future? I thought maybe gdata.blogger.client.Query would be the way to go, but this doesn't support post id as a query term. The example code distributed with the Python gdata module doesn't have an example of this use case, and after poking around gdata.blogger.client.* for a while I'm not making much progress. I could obviously iterate through all the posts in the blog until find the one with the corresponding id, but that would be a terrible, terrible idea.

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  • How can I connect to a mail server using SMTP over SSL using Python?

    - by jakecar
    Hello, So I have been having a hard time sending email from my school's email address. It is SSL and I could only find this code online by Matt Butcher that works with SSL: import smtplib, socket version = "1.00" all = ['SMTPSSLException', 'SMTP_SSL'] SSMTP_PORT = 465 class SMTPSSLException(smtplib.SMTPException): """Base class for exceptions resulting from SSL negotiation.""" class SMTP_SSL (smtplib.SMTP): """This class provides SSL access to an SMTP server. SMTP over SSL typical listens on port 465. Unlike StartTLS, SMTP over SSL makes an SSL connection before doing a helo/ehlo. All transactions, then, are done over an encrypted channel. This class is a simple subclass of the smtplib.SMTP class that comes with Python. It overrides the connect() method to use an SSL socket, and it overrides the starttles() function to throw an error (you can't do starttls within an SSL session). """ certfile = None keyfile = None def __init__(self, host='', port=0, local_hostname=None, keyfile=None, certfile=None): """Initialize a new SSL SMTP object. If specified, `host' is the name of the remote host to which this object will connect. If specified, `port' specifies the port (on `host') to which this object will connect. `local_hostname' is the name of the localhost. By default, the value of socket.getfqdn() is used. An SMTPConnectError is raised if the SMTP host does not respond correctly. An SMTPSSLError is raised if SSL negotiation fails. Warning: This object uses socket.ssl(), which does not do client-side verification of the server's cert. """ self.certfile = certfile self.keyfile = keyfile smtplib.SMTP.__init__(self, host, port, local_hostname) def connect(self, host='localhost', port=0): """Connect to an SMTP server using SSL. `host' is localhost by default. Port will be set to 465 (the default SSL SMTP port) if no port is specified. If the host name ends with a colon (`:') followed by a number, that suffix will be stripped off and the number interpreted as the port number to use. This will override the `port' parameter. Note: This method is automatically invoked by __init__, if a host is specified during instantiation. """ # MB: Most of this (Except for the socket connection code) is from # the SMTP.connect() method. I changed only the bare minimum for the # sake of compatibility. if not port and (host.find(':') == host.rfind(':')): i = host.rfind(':') if i >= 0: host, port = host[:i], host[i+1:] try: port = int(port) except ValueError: raise socket.error, "nonnumeric port" if not port: port = SSMTP_PORT if self.debuglevel > 0: print>>stderr, 'connect:', (host, port) msg = "getaddrinfo returns an empty list" self.sock = None for res in socket.getaddrinfo(host, port, 0, socket.SOCK_STREAM): af, socktype, proto, canonname, sa = res try: self.sock = socket.socket(af, socktype, proto) if self.debuglevel > 0: print>>stderr, 'connect:', (host, port) self.sock.connect(sa) # MB: Make the SSL connection. sslobj = socket.ssl(self.sock, self.keyfile, self.certfile) except socket.error, msg: if self.debuglevel > 0: print>>stderr, 'connect fail:', (host, port) if self.sock: self.sock.close() self.sock = None continue break if not self.sock: raise socket.error, msg # MB: Now set up fake socket and fake file classes. # Thanks to the design of smtplib, this is all we need to do # to get SSL working with all other methods. self.sock = smtplib.SSLFakeSocket(self.sock, sslobj) self.file = smtplib.SSLFakeFile(sslobj); (code, msg) = self.getreply() if self.debuglevel > 0: print>>stderr, "connect:", msg return (code, msg) def setkeyfile(self, keyfile): """Set the absolute path to a file containing a private key. This method will only be effective if it is called before connect(). This key will be used to make the SSL connection.""" self.keyfile = keyfile def setcertfile(self, certfile): """Set the absolute path to a file containing a x.509 certificate. This method will only be effective if it is called before connect(). This certificate will be used to make the SSL connection.""" self.certfile = certfile def starttls(): """Raises an exception. You cannot do StartTLS inside of an ssl session. Calling starttls() will return an SMTPSSLException""" raise SMTPSSLException, "Cannot perform StartTLS within SSL session." And then my code: import ssmtplib conn = ssmtplib.SMTP_SSL('HOST') conn.login('USERNAME','PW') conn.ehlo() conn.sendmail('FROM_EMAIL', 'TO_EMAIL', "MESSAGE") conn.close() And got this error: /Users/Jake/Desktop/Beth's Program/ssmtplib.py:116: DeprecationWarning: socket.ssl() is deprecated. Use ssl.wrap_socket() instead. sslobj = socket.ssl(self.sock, self.keyfile, self.certfile) Traceback (most recent call last): File "emailer.py", line 5, in conn = ssmtplib.SMTP_SSL('HOST') File "/Users/Jake/Desktop/Beth's Program/ssmtplib.py", line 79, in init smtplib.SMTP.init(self, host, port, local_hostname) File "/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/smtplib.py", line 239, in init (code, msg) = self.connect(host, port) File "/Users/Jake/Desktop/Beth's Program/ssmtplib.py", line 131, in connect self.sock = smtplib.SSLFakeSocket(self.sock, sslobj) AttributeError: 'module' object has no attribute 'SSLFakeSocket' Thank you!

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  • How to setup RAM disk drive using python or WMI?

    - by Ming Xie
    Hi, The background of my question is associated with Tesseract, the free OCR engine (1985-1995 by HP, now hosting in Google). It specifically requires an input file and an output file; the argument only takes filename (not stream / binary string), so in order to use the wrapper API such as pytesser and / or python-tesser.py, the OCR temp files must be created. I, however, have a lot of images need to OCR; frequent disk write and remove is inevitable (and of course the performance hit). The only choice I could think about is changing the wrapper class and point the temp file to RAM disk, which bring this problem up. If you have better solution, please let me know. Thanks a lot. -M

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  • Segmentation fault when running a python script/GTKBuilder app?

    - by pythonscript
    I'm trying to learn GUI programming using python2 and GTKBuilder, but I get a segmentation fault when I run the code. This is my file, created in Glade as a GTKBuilder file: <?xml version="1.0" encoding="UTF-8"?> <interface> <!-- interface-requires gtk+ 3.0 --> <object class="GtkWindow" id="mainWindow"> <property name="can_focus">False</property> <child> <object class="GtkBox" id="box1"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="orientation">vertical</property> <child> <object class="GtkBox" id="box2"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="halign">start</property> <property name="margin_left">146</property> <property name="margin_right">276</property> <child> <object class="GtkLabel" id="label1"> <property name="visible">True</property> <property name="can_focus">False</property> <property name="label" translatable="yes">label</property> </object> <packing> <property name="expand">True</property> <property name="fill">False</property> <property name="position">0</property> </packing> </child> <child> <object class="GtkEntry" id="entryName"> <property name="visible">True</property> <property name="can_focus">True</property> <property name="margin_bottom">4</property> <property name="hexpand">True</property> <property name="vexpand">True</property> <property name="invisible_char">?</property> <property name="placeholder_text">Please enter your name here...</property> </object> <packing> <property name="expand">True</property> <property name="fill">True</property> <property name="position">1</property> </packing> </child> </object> <packing> <property name="expand">False</property> <property name="fill">True</property> <property name="position">0</property> </packing> </child> <child> <object class="GtkButton" id="buttonWriteNameToFile"> <property name="label" translatable="yes">button</property> <property name="use_action_appearance">False</property> <property name="visible">True</property> <property name="can_focus">True</property> <property name="receives_default">True</property> <property name="use_action_appearance">False</property> <signal name="clicked" handler="buttonWriteNameToFile_clicked" swapped="no"/> </object> <packing> <property name="expand">False</property> <property name="fill">True</property> <property name="position">1</property> </packing> </child> <child> <placeholder/> </child> <child> <placeholder/> </child> </object> </child> </object> </interface> My python code, based on this question, is this: #!/usr/bin/env python import gtk class NameApp: def __init__(self): filename = "project.glade" builder = gtk.Builder() builder.add_from_file(filename) builder.connect_signals(self) builder.get_object("mainWindow").show_all() def buttonWriteNameToFile_clicked(self, widget): print("File write code...") if __name__ == "__main__": app = NameApp() gtk.main() Running the file with python2 yields this error: name.py:9: Warning: cannot create instance of abstract (non-instantiatable) type `GtkBox' builder.add_from_file(filename) ./geany_run_script.sh: line 5: 14897 Segmentation fault python2 "name.py" I thought I followed that example as closely as possible, and I don't see any differences outside of the GTKBuilder file. However, the example in the linked question runs successfully on my machine. I don't know if it's relevant, but I'm running Arch Linux x86_64.

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  • Has anyone combined soap.py or suds with python-ntlm?

    - by Chris R
    I'd like to replace an app's current (badly busted and crufty) cURL-based (cURL command-line based!) SOAP client with suds or soap.py. Trouble is, we have to contact an MS CRM service, and therefore must use NTLM. For a variety of reasons the NTLM proxy is a bit of a pain to use, so I'm looking into python-ntlm to provide that support. Can suds or soap.py be made to use this authentication method? If so, how? If not, any other suggestions would be fantastic.

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  • how to extract elements from a list in python ?

    - by Stefano Borini
    I feel suddenly uneasy of not being able to perform this operation easily. It could be that I'm tired, or that there's really no way (google didn't help), but... if you have a list in python, and want to extract element at indices say 1, 2 and 5 into a new list, how do you do ? This is how I did it, but I'm not very satisfied >>> a [10, 11, 12, 13, 14, 15] >>> [x[1] for x in enumerate(a) if x[0] in [1,2,5]] [11, 12, 15] any better way ? more in general, given a tuple with indices, how to use this tuple to extract the corresponding elements from a list, eventually with duplication (e.g. tuple (1,1,2,1,5) produces [11,11,12,11,15] )

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  • What's the best way to do literate programming in Python on Windows?

    - by JasonFruit
    I've been playing with various ways of doing literate programming in Python. I like noweb, but I have two main problems with it: first, it is hard to build on Windows, where I spend about half my development time; and second, it requires me to indent each chunk of code as it will be in the final program --- which I don't necessarily know when I write it. I don't want to use Leo, because I'm very attached to Emacs. Is there a good literate programming tool that: Runs on Windows Allows me to set the indentation of the chunks when they're used, not when they're written Still lets me work in Emacs Thanks! Correction: noweb does allow me to indent later --- I misread the paper I found on it. By default, notangle preserves whitespace and maintains indentation when expanding chunks. It can therefore be used with languages like Miranda and Haskell, in which indentation is significant That leaves me with only the "Runs on Windows" problem.

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  • Python: Why can't I use `super` on a class?

    - by cool-RR
    Why can't I use super to get a method of a class's superclass? Example: Python 3.1.3 >>> class A(object): ... def my_method(self): pass >>> class B(A): ... def my_method(self): pass >>> super(B).my_method Traceback (most recent call last): File "<pyshell#2>", line 1, in <module> super(B).my_method AttributeError: 'super' object has no attribute 'my_method' (Of course this is a trivial case where I could just do A.my_method, but I needed this for a case of diamond-inheritance.) According to super's documentation, it seems like what I want should be possible. This is super's documentation: (Emphasis mine) super() - same as super(__class__, <first argument>) super(type) - unbound super object super(type, obj) - bound super object; requires isinstance(obj, type) super(type, type2) - bound super object; requires issubclass(type2, type) [non-relevant examples redacted]

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  • Python noob question - why is my simple regex not working?

    - by coson
    Good Day, I have a simple Python question that I'm having brain freeze on. This code snippet works. But when I substitue "258 494-3929" with phoneNumber, I get the following error below: # Compare phone number phone_pattern = '^\d{3} ?\d{3}-\d{4}$' # phoneNumber = str(input("Please enter a phone number: ")) if re.search(phone_pattern, "258 494-3929"): print "Pattern matches" else: print "Pattern doesn't match!" ####################################################### Pattern does not match Please enter a phone number: 258 494-3929 Traceback (most recent call last): File "pattern_match.py", line 16, in phoneNumber = str(input("Please enter a phone number: ")) File "", line 1 258 494-3929 ^ SyntaxError: invalid syntax C:\Users\Developer\Documents\PythonDemo btw. I did import re and tried using rstrip in case of the \n What else could I be missing? TIA, coson

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  • What is your strategy to avoid dynamic typing errors in Python (NoneType has no attribute x)?

    - by Koen Bok
    Python is one of my favorite languages, but I really have a love/hate relationship with it's dynamicness. Apart from the advantages, it often results in me forgetting to check a type, trying to call an attribute and getting the NoneType (or any other) has no attribute x error. A lot of them are pretty harmless but if not handled correctly they can bring down your entire app/process/etc. Over time I got better predicting where these could pop up and adding explicit type checking, but because I'm only human I miss one occasionally and then some end-user finds it. So I'm interested in your strategy to avoid these. Do you use type-checking decorators? Maybe special object wrappers? Please share...

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