import sys if 'setuptools' in sys.modules: try: from setuptools.command.build_ext import build_ext as _build_ext except ImportError: # We may be in the process of importing setuptools, which tries # to import this. from distutils.command.build_ext import build_ext as _build_ext else: from distutils.command.build_ext import build_ext as _build_ext class new_build_ext(_build_ext, object): def finalize_options(self): if self.distribution.ext_modules: from Cython.Build.Dependencies import cythonize self.distribution.ext_modules[:] = cythonize( self.distribution.ext_modules) super(build_ext, self).finalize_options() # This will become new_build_ext in the future. from Cython.Distutils.old_build_ext as build_ext