setup.py 文件源码

def run(self):
        # Make sure the compiled Cython files in the distribution are
        # up-to-date

        try:
            import pypandoc
        except ImportError:
            raise RuntimeError(
                'Trying to create a source distribution without pypandoc. '
                'The readme will not render correctly on pypi without '
                'pypandoc so we are exiting.'
            )
        # Make sure the compiled Cython files in the distribution are up-to-date
        from Cython.Build import cythonize
        cythonize(cython_extensions)
        _sdist.run(self)