# list_flat.py

# list_flat.py

def flat(lst):
    '''
    return a tuple making from all values from the flatten list of lists (or tuple of tuples, etc.)
    '''
    return reduce(lambda l, e: (isinstance(e, list) or isinstance(e, tuple)) and l + flat(e) or l + (e,), lst, ())

print flat([])# == ()
print flat((1,))# == (1,)
print flat([1, 2, 3])# == (1, 2, 3)
print flat([(1,2),[3,4,[5,6]],7,8,(9,(0,))])# == (1, 2, 3, 4, 5, 6, 7, 8, 9, 0)