setup.py 文件源码

def main():
    """ Perform setup with optional C speedups.

    Optional extension compilation stolen from markupsafe, which again stole
    it from simplejson. Creds to Bob Ippolito for the original code.
    """
    is_jython = 'java' in sys.platform
    is_pypy = hasattr(sys, 'pypy_translation_info')

    if is_jython or is_pypy:
        del setup_options['ext_modules']

    try:
        setup(**setup_options)
    except BuildError as be:
        sys.stderr.write('''
BUILD ERROR:
  %s
RETRYING WITHOUT C EXTENSIONS
''' % (be,))
        del setup_options['ext_modules']
        setup(**setup_options)