# ticket: 480
def f(x):
return x
def len_f(x):
"""
>>> len_f([1,2,3])
3
"""
return len(f(x))
def float_len_f(x):
"""
>>> float_len_f([1,2,3])
3.0
"""
return float(len(f(x)))
def cast_len_f(x):
"""
>>> cast_len_f([1,2,3])
3.0
"""
return <double>len(f(x))