from functools import reduce

def str2num(s):

    try :

        ss = int(s)

    except ValueError:

        print('the %s vaule not is int type' % s)

    finally :

        try :

            ss =float(s)

        except ValueError:

            print('the %s value not is float type' % s)

        return ss

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()