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#1
June 5th, 2004, 12:07 PM
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Socket Module Implementation
When looking in the socket module code the first comment reads:
Code:
# Wrapper module for _socket, providing some additional facilities # implemented in Python. Does anyone know where _socket is? Also, is it possible to write a lower level socket module?
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#2
June 5th, 2004, 12:44 PM
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Under windows i'd assume it were in the DLL folder within Pythons main directory. If you do a search for _socket.pyd then you should find it
 .The socket module is a wrapper over that defined by C/C++ so i would highly dout it although if you look into how C/C++ implements this then maybe... Mark. Last edited by netytan : June 5th, 2004 at 12:47 PM.
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#3
June 5th, 2004, 02:57 PM
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Quote:
socket is a low level socket with blocking
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#4
June 6th, 2004, 01:41 PM
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Quote:
Weird... it doesn't find it?
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#5
June 6th, 2004, 01:44 PM
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Mmm, thats strange. Does the socket module import properly. You might also want to try searching for _socket.dll though it should b _socket.pyd by convention.
Mark.
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#6
June 6th, 2004, 03:32 PM
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Code:
[Aurora:~] chris% python Python 2.3 (#1, Sep 13 2003, 00:49:11) [GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import socket >>> sock = socket.socket() >>> sock <socket._socketobject object at 0x538a0> >>> I'm on Mac OS X, so it wouldn't be .dll. I just searched for "_socket" and it found nothing. I downloaded the 2.3.4 source and I can't find it in there either.
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#7
June 6th, 2004, 04:22 PM
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Let's say you can import _socket (you should be able to):
Code:
>>> import _socket >>> print _socket.__file__ You should get the implementation file. Of course, this is nicer and works with many more objects: Code:
>>> import inspect >>> import _socket >>> print inspect.getfile(_socket)
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#8
June 6th, 2004, 05:13 PM
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Code:
[Aurora:~] chris% python Python 2.3 (#1, Sep 13 2003, 00:49:11) [GCC 3.3 20030304 (Apple Computer, Inc. build 1495)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import _socket >>> print _socket.__file__ /System/Library/Frameworks/Python.framework/Versions/2.3/lib/python2.3/lib-dynload/_socket.so This seems to point me to the shared library. Do you know where I can get the Python source for it (_socket is written in Python, isn't it?)?
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#9
June 6th, 2004, 05:20 PM
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No. The _socket module is not written in Python. It's written in C.
You can find the wrapper source in Python-Src/Modules/socketmodule.c and the header file in Python-Src/Modules/socketmodule.h.
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#10
June 6th, 2004, 06:33 PM
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Sorry to drag this on longer, but I just need one more clarification: Does socketmodule.c wrap _socket (socket->sockmodule->_socket) or is socketmodule.c the file for _socket?
Bah... I don't even understand how Python can import a C file...
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#11
June 6th, 2004, 09:09 PM
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The better question is - what do you need a lower level socket for?
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#13
June 7th, 2004, 11:25 AM
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But what exactly would you need to make it a lower-level one? The socket module provides you pretty much the same control over sockets as the equivalent C socket library would. In other words, they are already fairly low-level in that you have a good amount of control over them, but they are high-level in the respect that they are wrapped in a nice interface that you can easily use without a lot of setup.
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#14
June 7th, 2004, 12:49 PM
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Quote:
I'm interested in low-level stuff (don't tell me to "use C then", because I already do ). Although, it was the actual implementation of the socket module for Python that interested me, and writing it over again would be a waste so the alternative was to write a lower level one.
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