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  • python interpreter waits for child process to die

    - by Moulik Kallupalam
    Contents of check.py: from multiprocessing import Process import time import sys def slp(): time.sleep(30) f=open("yeah.txt","w") f.close() if __name__=="__main__" : x=Process(target=slp) x.start() sys.exit() In windows 7, from cmd, if I call python check.py, it doesn't immediately exit, but instead waits for 30 seconds. And if I kill cmd, the child dies too- no "yeah.txt" is created. How do I make ensure the child continues to run even if parent is killed and also that the parent doesn't wait for child process to end?

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  • Bi-partitle matching in Python

    - by vailen
    Does anybody know any module in Python that computes the best bi-partite matching? I have tried the following two: munkres hungarian However, in my case, I have to deal with non-complete graph (i.e., there might not be an edge between two nodes), and therefore, there might not be a match if the node has no edge. The above two packages seem not be able to deal with this. Any advise?

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  • Creating a relative path to a Database in Asp.net for a library

    - by Greener
    In school I am part of a team of four working to create a GUI to translate the paper records of a made-up company and their functionality to a digital format. We're using an ASP.NET website for this purpose. Basically we use stored procedures and C# classes to represent the database. The folder we're using for the project contains the site and the libraries in separate folders. If I try to open the site from the folder containing both these elements the site will not run. I want to know if there is some way I can set up a relative path to the database in the Settings.Settings.cs file (or by some other means) of my libraries so I don't have to constantly change the database location for the connection string value every time we move the project. I suppose I should also mention that the database is in an App_Data folder.

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  • Are classes in Python in different files?

    - by Asaf
    Much like Java (or php), I'm use to seperating the classes to files. Is it the same deal in Python? plus, how should I name the file? Lowercase like classname.py or the same like ClassName.py? Do I need to do something special if I want to create an object from this class or does the fact that it's in the same "project" (netbeans) makes it ok to create an object from it?

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  • python objects confusion

    - by james
    wow i thought i knew python untill tonight.. what is the correct way to do something like this.. heres my code a = ["one", "two", "three"] b = a #here i want a complete copy that when b is changed, has absolutely no effect on a b.append["four"] print a #a now has "four" in it.. so basically i want to know, instead of the b = a step, how would i correctly make a copy of a list or dictionary so that when b is changed a does not change along with it.. thanks guys

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  • Need to constantly monitor serial data in Python

    - by jakke34
    Right now I am using an arduino to send data from an analog sensor to COM4. I am trying to make a python script that continuously monitors that data and looks for a certain parameter. I tried something like this but it isn't outputing the data like I want. import serial port = "COM4" ser = serial.Serial(port,9600, timeout =1) value = 0 while 1: value = ser.read() print value

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  • Safest python code running

    - by Oduvan
    How can I protect my web server, if I run custom users code on server. If any user can submit his python source on my server and run it. Maybe some modules or linux tools for close any network and hardware activity for this script. Thank's all for help!

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  • Parsing timestamp with retarded Python

    - by jellybean
    I want to parse a timestamp from a log file that has been written via datetime.datetime.now().strftime('%Y%m%d%H%M%S') and then compute the number of seconds that have passed since this timestamp. I know I could do it with datetime.datetime.strptime to get back a datetime object and then compute a timedelta. Problem is, the strptime function has been introduced with Python 2.5 and I'm using Python2.4.4 (an upgrade is not possible in my context). Any easy way to do this?

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  • [python] traversing an object tree

    - by jml
    Hi there, I'm trying to find information on different ways to traverse an object tree in python. I don't know much about the language in general yet, so any suggestions/techniques would be welcome. Thanks so much jml

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  • What are my alternatives to manage Python packages for clients?

    - by c00kiemonster
    So the setup is a slew of proprietary server/client Python applications running on one Linux box (the server) and a set of Windows 7 workstations (the clients). Everything is running smoothly until any of the proprietary Python packages needs updating. For now I am using distutils eggs which are very easily updated with easy_install, but it is still a manual process which quickly becomes tedious as the number of applications and client workstations grow. The ideal setup IMHO is to have the Python packages on the server so when a client application is launched on a workstation the client application can check to see whether its current Python packages are up-to-date. If not, the client application should download the newer Python package from the server, install it, and then launch as per normal. Does this sounds familiar to anyone? I have tried to find alternatives myself, but as far as I can see there is no Python module offering this functionality. Does anyone have any home made solutions for this?

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  • Python new-style classes and __subclasses__ function

    - by Fraser Graham
    Can somebody explain to me why this works (in Python 2.5) : class Foo(object): pass class Bar(Foo): pass print(Foo.__subclasses__()) but this doesn't : class Foo(): pass class Bar(Foo): pass print(Foo.__subclasses__()) The latter returns "AttributeError: class Foo has no attribute '__subclasses__'" but i'm not sure why. I know this is related to old-style vs. new-style classes but i'm not clear on why that would make this functionality unavailable.

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  • change file descriptor for socket in python

    - by Dani
    Hello everybody I'm trying to manually create the file descriptor associated with a socket in python and then loaded directly into memory with mmap. Create a file into memory with mmap is simple, but I can not find a way to associate the file with a socket. Anyone know how? thank you very much.

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  • How to make an executable file in python?

    - by aF
    Hello, I want to make an executable file (.exe) of my python's application. I want to know how to do it but have this in mind: I use a c++ dll! Do I have to put the dll along side with the .exe or is there some other way? Thanks in advance!

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  • NetBeans and Python

    - by spacemonkey
    When I run some python code in NetBeans, which raises an error, the output in NetBeans just gives an error message and no further information, such as line number. Is there any way to fix that?

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  • Help with PHPExcel Library and mySQL data from a table

    - by user547363
    Hello! Everyone.. I have this script $query = "SELECT id,last_name,first_name FROM users WHERE tmima_id='6'"; $result = @mysql_query($query); while($row = mysql_fetch_array($result)) { $i = 3; $emp_id = $row['id']; $cell = 'A'.$i; $objPHPExcel->setActiveSheetIndex(0) ->setCellValue($cell, $row['last_name']. $row['first_name']); $i++; } But in the .xls file it prints only one user. Why id doesnt print all of the users ? W Thanks in advance.

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  • running a python script on a remote computer

    - by Richard
    Hello all, I have a python script and am wondering is there any way that I can ensure that the script run's continuously on a remote computer? Like for example, if the script crashes for whatever reason, is there a way to start it up automatically instead of having to remote desktop. Are there any other factors I have to be aware of? The script will be running on a window's machine.

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  • How to share a dictionary between multiple processes in python without locking

    - by RandomVector
    I need to share a huge dictionary (around 1 gb in size) between multiple processs, however since all processes will always read from it. I dont need locking. Is there any way to share a dictionary without locking? The multiprocessing module in python provides an Array class which allows sharing without locking by setting lock=false however There is no such option for Dictionary provided by manager in multiprocessing module.

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  • Fast matrix transposition in Python

    - by psihodelia
    Is there any fast method to make a transposition of a rectangular 2D matrix in Python (non-involving any library import).? Say, if I have an array X=[[1,2,3], [4,5,6]] I need an array Y which should be a transposed version of X, so Y=[[1,4],[2,5],[3,6]].

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  • Scientific Plotting in Python

    - by user100046
    I have a large data set of tuples containing (time of event, latitude, longitude) that I need to visualize. I was hoping to generate a 'movie'-like xy-plot, but was wondering if anyone has a better idea or if there is an easy way to do this in Python? Thanks in advance for the help, --Leo

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