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习题打卡

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from functools import reduce

def str2num(s):

    return float(s)

def calc(exp):

    ss = exp.split('+')     #ss=[100,200,300]

    ns = map(str2num, ss)     #ns=100,200,300

    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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