Help! IndentationError: unindent does not match any outer indication level

Another problem is not like. Maybe in writing by tab and share space and an error occurs.

And I think the factional value will come out properly if the result = is set to 1, not 0.

import sys

def Factorial(n): # return factorial
    result = 1
    for i in range (1,n):
        result = result * i
    print "factorial is ",result
    return result

print Factorial(10)

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