Mysterious for loop in python

Question

Let exp = [1,2,3,4,5]

If I then execute x in exp, it will give me False. But if I execute :

for x in exp:
             


        

Answer 1

for x in ... inherently assigns values to x, because x is the loop variable in a for loop.

Each iteration of the loop assigns a value into x; Python doesn't create a new variable scope for loops.

for x in (1, 2, 3):
    foo(x)

is the equivalent of...

x = 1
foo(x)
x = 2
foo(x)
x = 3
foo(x)