compat.py 文件源码

def get_md5(*args, **kwargs):
    """
    Attempts to get an md5 hashing object.

    :param raise_error_if_unavailable: raise an error if md5 is unavailable on
        this system. If False, None will be returned if it is unavailable.
    :type raise_error_if_unavailable: bool
    :param args: Args to pass to the MD5 constructor
    :param kwargs: Key word arguments to pass to the MD5 constructor
    :return: An MD5 hashing object if available. If it is unavailable, None
        is returned if raise_error_if_unavailable is set to False.
    """
    if MD5_AVAILABLE:
        return hashlib.md5(*args, **kwargs)
    else:
        raise MD5UnavailableError()