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| -rw-r--r-- | Doc/extending/extending.rst | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/Doc/extending/extending.rst b/Doc/extending/extending.rst index 12868d3..17cfdeb 100644 --- a/Doc/extending/extending.rst +++ b/Doc/extending/extending.rst @@ -20,12 +20,17 @@ source file by including the header ``"Python.h"``. The compilation of an extension module depends on its intended use as well as on your system setup; details are given in later chapters. -Do note that if your use case is calling C library functions or system calls, -you should consider using the :mod:`ctypes` module rather than writing custom -C code. Not only does :mod:`ctypes` let you write Python code to interface -with C code, but it is more portable between implementations of Python than -writing and compiling an extension module which typically ties you to CPython. +.. note:: + The C extension interface is specific to CPython, and extension modules do + not work on other Python implementations. In many cases, it is possible to + avoid writing C extensions and preserve portability to other implementations. + For example, if your use case is calling C library functions or system calls, + you should consider using the :mod:`ctypes` module or the `cffi + <http://cffi.readthedocs.org>`_ library rather than writing custom C code. + These modules let you write Python code to interface with C code and are more + portable between implementations of Python than writing and compiling a C + extension module. .. _extending-simpleexample: |