what happened when using the same variable in two layer loops in python?

Question

I test the following code:

for i in range(3):
    for i in range(3,5):
        print \"inner i: %d\"%(i)
    print \"outer i: %d\"%(i)

and

Answer 1

Check @heltonbiker answer :

>>> for i in range(3):
    print "1-",locals()
    for i in range(3,5):
        print "2-",locals()


1- {'__builtins__': , '__package__': None, 'i': 0, '__name__': '__main__', '__doc__': None}
2- {'__builtins__': , '__package__': None, 'i': 3, '__name__': '__main__', '__doc__': None}
2- {'__builtins__': , '__package__': None, 'i': 4, '__name__': '__main__', '__doc__': None}
1- {'__builtins__': , '__package__': None, 'i': 1, '__name__': '__main__', '__doc__': None}
2- {'__builtins__': , '__package__': None, 'i': 3, '__name__': '__main__', '__doc__': None}
2- {'__builtins__': , '__package__': None, 'i': 4, '__name__': '__main__', '__doc__': None}
1- {'__builtins__': , '__package__': None, 'i': 2, '__name__': '__main__', '__doc__': None}
2- {'__builtins__': , '__package__': None, 'i': 3, '__name__': '__main__', '__doc__': None}
2- {'__builtins__': , '__package__': None, 'i': 4, '__name__': '__main__', '__doc__': None}
>>> 

You read i data on wrong time (place)!

If there is a single BUS or Variable name You must use the FIFO method.

FIFO << Here information