Expert Python Programming Second Edition by 2016

Author:2016
Language: eng
Format: epub, mobi
Publisher: Packt Publishing

Cython used as a source compilation tool for the Python language has another benefit. Source to source compilation to extensions can be a fully optional part of source distribution installation process. If the environment where the package needs to be installed does not have Cython or any other building prerequisites, it can be installed as a normal pure Python package. The user should not notice any functional difference in the behavior of code distributed that way.

A common approach for distributing extensions built with Cython is to include both Python/Cython sources and C code that would be generated from these source files. This way the package can be installed in three different ways depending on the existence of building prerequisites:

If the installation environment has Cython available, the extension C code is generated from the Python/Cython sources that are provided

If Cython is not available but there are available building prerequisites (C compiler, Python/C API headers), the extension is built from distributed pre-generated C files

If neither of the preceding prerequisites is available but the extension is created from pure Python sources, the modules are installed like ordinary Python code, and the compilation step is skipped

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