setup.py 文件源码

def _parse_requirements(filepath):
    pip_version = list(map(int, pkg_resources.get_distribution('pip').version.split('.')[:2]))
    if pip_version >= [6, 0]:
        raw = parse_requirements(filepath, session=pip.download.PipSession())
    else:
        raw = parse_requirements(filepath)

    return [str(i.req) for i in raw]