# -*- coding: utf-8 -*-
from functools import reduce

def str2float(s):
    dict = {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9}
    dec_list = s.split('.')
    dec_list[0] = reduce(lambda x, y: x * 10 + y, map(lambda x: dict[x], dec_list[0]))
    dec_list[1] = reduce(lambda x, y: x * 0.1 + y , list(map(lambda x: dict[x], dec_list[1]))[::-1])
    return dec_list[0] + dec_list[1] * 0.1