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| from itertools import permutations | |
| def exp(a, b, *c): | |
| if c: | |
| for op in '+-*/': | |
| yield from exp(f'({a}{op}{b})', *c) | |
| yield from exp(f'({b}{op}{a})', *c) | |
| for i in range(1, len(c) + 1): | |
| yield from exp(*c[:i], f'({a}{op}{b})', *c[i:]) | |
| yield from exp(*c[:i], f'({b}{op}{a})', *c[i:]) | |
| else: | |
| for op in '+-*/': | |
| yield f'({a}{op}{b})' | |
| yield f'({b}{op}{a})' | |
| def make(numbers, target): | |
| for e in set(e for n in permutations(numbers) for e in exp(*n)): | |
| try: | |
| if eval(e) == target: | |
| yield e | |
| except ZeroDivisionError: | |
| pass | |
| def main(): | |
| print(list(make([1, 1, 9, 9], 10))) | |
| if __name__ == "__main__": | |
| main() |
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