arrow in python function

1"""
2The arrow in python functions denotes the return value of the function. Note
3that the arrow doesn't enforce anything, and nothing prevents a developer from
4returning some value that isn't what is indicated. Obviously, this is bad
5practice, and should never happen.
6
7In the example below c is gotten from a function that claims to return an int,
8but instead returns a float. Despite this, Python has no problem using the
9float methods in c.
10"""
11
12def int_returner() -> int:
13    return 1
14
15def float_returner() -> float:
16    return 1.0
17
18def fake_int_returner() -> int:
19    return 1.0
20
21
22a = int_returner()
23b = float_returner()
24c = fake_int_returner()
25
26print(type(a)) #int
27print(type(b)) #float
28print(type(c)) #float (function hints an 'int')
29
30# is_integer() is a built-in function for floats that integers don't have.
31try:
32    a.is_integer()
33except:
34    print ("a has no method 'is_integer' meaning it isn't of type float")
35try:
36    b.is_integer()
37except:
38    print ("b has no method 'is_integer' meaning it isn't of type float")
39try:
40    c.is_integer()
41except:
42    print ("c has no method 'is_integer' meaning it isn't of type float")
43
44