Function is_tarfile

Lib/tarfile.py:3016–3032

Return True if name points to a tar archive that we are able to handle, else return False. 'name' should be a string, file, or file-like object.

(name)

#--------------------

def is_tarfile(name):
    """Return True if name points to a tar archive that we
       are able to handle, else return False.

       'name' should be a string, file, or file-like object.
    """
    try:
        if hasattr(name, "read"):
            pos = name.tell()
            t = open(fileobj=name)
            name.seek(pos)
        else:
            t = open(name)
        t.close()
        return True
    except TarError:
        return False

open = TarFile.open