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test_number

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from functools import reduce

def str2num(s): try: return int(s) except Exception as e: print('Error:',e) try: return float(s) except : print('Error:a valid number!')

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

def main(): r = calc('100 + 200 + 345') print('100 + 200 + 345 =', r) r = calc('99 + 88 + 7.6') print('99 + 88 + 7.6 =', r)

main()


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