setup.py 文件源码

def finalize_options(self):
        try:
            import cython
            import numpy
        except ImportError:
            raise ImportError(
"""Could not import cython or numpy. Building yt from source requires
cython and numpy to be installed. Please install these packages using
the appropriate package manager for your python environment.""")
        if LooseVersion(cython.__version__) < LooseVersion('0.24'):
            raise RuntimeError(
"""Building yt from source requires Cython 0.24 or newer but
Cython %s is installed. Please update Cython using the appropriate
package manager for your python environment.""" %
                cython.__version__)
        if LooseVersion(numpy.__version__) < LooseVersion('1.10.4'):
            raise RuntimeError(
"""Building yt from source requires NumPy 1.10.4 or newer but
NumPy %s is installed. Please update NumPy using the appropriate
package manager for your python environment.""" %
                numpy.__version__)
        from Cython.Build import cythonize
        self.distribution.ext_modules[:] = cythonize(
                self.distribution.ext_modules)
        _build_ext.finalize_options(self)
        # Prevent numpy from thinking it is still in its setup process
        # see http://stackoverflow.com/a/21621493/1382869
        if isinstance(__builtins__, dict):
            # sometimes this is a dict so we need to check for that
            # https://docs.python.org/3/library/builtins.html
            __builtins__["__NUMPY_SETUP__"] = False
        else:
            __builtins__.__NUMPY_SETUP__ = False
        self.include_dirs.append(numpy.get_include())