sisoku.py

#coding: utf-8

from itertools import permutations
operators = ('+', '-', '*', '/', '==')

for ordered_operators in permutations(operators):
    equation = '5.%s4.%s3.%s2.%s1.%s0.' % ordered_operators
    try:
        if eval(equation):
            print equation
    except ZeroDivisionError:
        pass