from functools import reduce def str2num(s): s = s.strip() if s.replace('.','').isdigit(): if s.count('.') == 0: return int(s) else: return float(s) else: raise ValueError('input error') def calc(exp): ss = exp.split('+') print('ss=',ss) 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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Roger_R36