qwerty_switcher.py

#!/usr/bin/python3
# -*- coding: utf-8 -*-

qwerty  = "qwertyuiop[]asdfghjkl;'zxcvbnm,./QWERTYUIOP{}ASDFGHJKL:\"ZXCVBNM<>?"
RUWERTY = "йцукенгшщзхъфывапролджэячсмитьбю.ЙЦУКЕНГШЩЗХЪФЫВАПРОЛДЖЭЯЧСМИТЬБЮ."
qwerty_list = list(qwerty)
RUWERTY_LIST = list(RUWERTY)

in_str = input()
out_str = ""

for char in in_str:
    if char in qwerty:
        index = qwerty_list.index(char)
        out_str += RUWERTY_LIST[index]
    elif char in RUWERTY:
        index = RUWERTY_LIST.index(char)
        out_str += qwerty_list[index]
    else:
        out_str += char

print(out_str)