virtualEnvironment/lib/python2.7/site-packages/pip/download.py
def is_archive_file(name):
    """Return True if `name` is a considered as an archive file."""
    archives = (
        '.zip', '.tar.gz', '.tar.bz2', '.tgz', '.tar', '.whl'
    )
    ext = splitext(name)[1].lower()
    if ext in archives:
        return True
    return False
def is_archive_file(name):
    """Return True if `name` is a considered as an archive file."""
    archives = (
        '.zip', '.tar.gz', '.tar.bz2', '.tgz', '.tar', '.whl'
    )
    ext = splitext(name)[1].lower()
    if ext in archives:
        return True
    return False
Return True if `name` is a considered as an archive file.