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作业!

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0汪小汪0

#1 Created at ... [Delete] [Delete and Lock User]

from functools import reduce

def str2num(s): return float(s)

def calc(exp): ss = exp.split('+') ns = map(str2num, ss) return reduce(lambda acc, x: acc + x, ns)

def main(): try: r = calc('100 + 200 + 345') print('100 + 200 + 345 =', r) r = calc('99 + 88 + 7.6') print('99 + 88 + 7.6 =', r) except ValueError as e: print('-----') main()


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