__init__.py 文件源码

def safe_version(version):
    """
    Convert an arbitrary string to a standard version string
    """
    try:
        # normalize the version
        return str(packaging.version.Version(version))
    except packaging.version.InvalidVersion:
        version = version.replace(' ','.')
        return re.sub('[^A-Za-z0-9.]+', '-', version)