def f1(i):
    print('f1 is called')
    print('Before assignment the ID of "i" is: {}'.format(id(i)))
    print('Notice that the ID is the same as initial ID.')
    i = i + 1
    print('After assignment the ID of "i" is: {}'.format(id(i)))
    print('''Not "i" inside the functions refers to the different address,
so the changes to "i" won't be reflected outside the function.''')
 
 
i = 1
print('Initial ID of "i" is: {}'.format(id(i)))
f1(i)

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