#!/usr/bin/env python3

# -*- coding: utf-8 -*-

from functools import reduce

CHAR_TO_INT = {

'0': 0,

'1': 1,

'2': 2,

'3': 3,

'4': 4,

'5': 5,

'6': 6,

'7': 7,

'8': 8,

'9': 9

}

def str2int(s):

ints = map(lambda ch: CHAR_TO_INT[ch], s)

return reduce(lambda x, y: x * 10 + y, ints)

print(str2int('0'))

print(str2int('12300'))

print(str2int('0012345'))

CHAR_TO_FLOAT = {

'0': 0,

'1': 1,

'2': 2,

'3': 3,

'4': 4,

'5': 5,

'6': 6,

'7': 7,

'8': 8,

'9': 9,

'.': -1

}

def str2float(s):

nums = map(lambda ch: CHAR_TO_FLOAT[ch], s)

point = 0

def to_float(f, n):

nonlocal point

if n == -1:

point = 1

return f

if point == 0:

return f * 10 + n

else:

point = point * 10

return f + n / point

return reduce(to_float, nums, 0.0)

print(str2float('0'))

print(str2float('123.456'))

print(str2float('123.45600'))

print(str2float('0.1234'))

print(str2float('.1234'))

print(str2float('120.0034'))