1# ticket: 480 2 3def f(x): 4 return x 5 6def len_f(x): 7 """ 8 >>> len_f([1,2,3]) 9 3 10 """ 11 return len(f(x)) 12 13def float_len_f(x): 14 """ 15 >>> float_len_f([1,2,3]) 16 3.0 17 """ 18 return float(len(f(x))) 19 20def cast_len_f(x): 21 """ 22 >>> cast_len_f([1,2,3]) 23 3.0 24 """ 25 return <double>len(f(x)) 26