mapped = Timer(setup=
    """from operator import itemgetter
lst=( ("a",), ("b",), (1,), (2,))""",
    stmt='map(itemgetter(0), lst)')
comprehended = Timer(setup='lst=( ("a",), ("b",), (1,), (2,))', stmt=
    '[i[0] for i in lst]')
comprehended.repeat()
mapped.repeat()
Python: Anyway to use map to get first element of a tuple