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Questions tagged [python-extensions]

Python is an interpreted, general-purpose high-level programming language whose design philosophy emphasizes code readability.

323 questions
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How to return a value from C to python from C's PyObject type of functions?

I was trying to pass a value by calling C file from python and then return that value from C to python again. My question is how to do this? Can it possible to use return Py_BuildValue(a+b) kind of thing? #include static PyObject…
kshitijsoni1
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How should I unit-test python wrapper generated by SWIG

I need to create python wrapper for the library using SWIG and write unit tests for it. I don't know how to do this. My first take on this problem is to mock dynamic library with the same interface as those library that I'm writing wrapper for. This…
Evgeny Lazin
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Sphinx documentation via autodoc for C Python modules

I am trying to document pycurl which is largely a C extension module. In this extension module there are some classes, written in C. They have methods. The methods have docstrings defined on them: >>> help(pycurl.Curl().close) Help on built-in…
user3294948
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Conflict between two linux shared objects defining the same function name

My problem deals with Python, Qt, PyQt and other stuff, but the question is actually about how Linux's ld.so actually works. THE QUESTION If a program loads two different shared libraries which both have the same entry point name (i.e. they both…
deStrangis
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cross compiling python native C extensions with distutilscross, setup.py won't accept '-x' argument

I have a working cross compile of Python, however I've tried cross compiling the py-smbus extension from i2c-tools using distutilscross and can't get past the command line. The documentation (https://pypi.python.org/pypi/distutilscross) suggests…
Sparky
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What is the opposite of PyMODINIT_FUNC in Python 2.x C extension modules?

I need to import one of the core modules (datetime) inside my C extension module since I want to return a datetime.date from some functions of my module. It appears that Python C extension modules have no complement for the PyMODINIT_FUNC upon…
0xC0000022L
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manually building a python extension in cygwin with boost.python

Sorry for such a general title, but i'm not quite sure what exactly i'm missing or what i'm doing wrong. My aim is to build a python extension using boost.python under cygwin and avoiding boost.build tools, that is using make instead of bjam. The…
user938720
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Why I get "C extension could not be compiled" when installing simplejson?

btw, i am using windows, so do i have to install visual studio? (py) D:\python>pip install simplejson Downloading/unpacking simplejson Downloading simplejson-2.6.2.tar.gz (53kB): 53kB downloaded Running setup.py egg_info for package…
hugemeow
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Can I use ctypes to call back C function from python embedded in C?

I have a C program with embedded python code. I have compiled python 2.7.2 from source and linked my program against libpython2.7.a. Now in my python code I wish to call back functions from other C libraries linked into my C program. I can write a…
Avner
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Adding output file to Python extension

I've defined a custom build_ext to build a funky extension that I'm trying to make pip-friendly. The following is a trimmed version of what I'm doing. foo_ext = Extension( name='foo/_foo', sources=foo_sources, ) class MyBuildExt(build_ext): …
sholsapp
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Monkey patching C extension in Python

Using the method discussed in question 972, I was unable to monkey patch the cursor() method in psycopg: Tried to patch a methond in psycopg2 with types but it did not work: >>> import psycopg2, types import psycopg2, types >>> db =…
Lester Cheung
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compile libdnet for python 2.7

I'm trying to use scapy on win32 python2.7 I've manage to compile all the other dependencies expect this one can some help in the goal of reaching this executable ? "dnet-1.12.win32-py2.7.exe" (I promise to update the this question too and the scapy…
Fruch
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Error while fetching extension. XHR failed

This is my first time installing and using VSCode, and when I try to install a python extension inside a VSCode application I get the error "Error While fetching extension. XHR failed" . How do I fix it? image
DonnyDongoran
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How to define a Python metaclass from C extension?

In pure Python, it is relatively simple to define and use a metaclass. class Meta(type): def __new__(cls, name, bases, dict): x = super().__new__(cls, name, bases, dict) print("I'm called on class construction time!") …
Edward Z. Yang
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Accessing a c++ vector/array from python via cython

I am wrapping a c++ program via cython and would like to make a vector from this program available in Python. I have written a getter method for the vector, which works fine except that it returns a copy of the data: # in cython from libcpp.vector…
Samufi
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