pool map cycle

[skorost5]

Trying to run twice pool map cycle.

from multiprocessing import Pool
b=["0","0","0","0","0","0"]

def f(c):
    b[5]=c
    return b
for i1 in range(1,3):
    if __name__ == '__main__':
        p = Pool(1)
        print(p.map(f, ["f", "n","x"]))
    b[2]="3"

The program displays the following response:

Output:
[['0', '0', '3', '0', '0', 'f'], ['0', '0', '3', '0', '0', 'n'], ['0', '0', '3', '0', '0', 'x']]
[['0', '0', '3', '0', '0', 'f'], ['0', '0', '3', '0', '0', 'n'], ['0', '0', '3', '0', '0', 'x']]

And I need it to be:

Output:
[['0', '0', '0', '0', '0', 'f'], ['0', '0', '0', '0', '0', 'n'], ['0', '0', '0', '0', '0', 'x']]
[['0', '0', '3', '0', '0', 'f'], ['0', '0', '3', '0', '0', 'n'], ['0', '0', '3', '0', '0', 'x']]

Why does the first line print 3 ?