#!/usr/bin/env python
# -*- coding: utf-8 -*-


"""
Napisz funkcję pokemon_speak, która zamienia w podanym napisie co drugą literę
na wielką. Np. pokemon_speak('pokemon') powinno zwrócić 'PoKeMoN'.
"""

def pokemon_speak(text):
    txtstr= ''
    if text.isupper():
        return(text)
    else:
        for i in range (len(text)):
            if (i % 2 == 0):
                txtstr +=text[i].upper()
            else:
                txtstr += text[i]
        return(txtstr)




def tests(f):
    inputs = [['pokemon'], ['do not want'], ['POKEMON']]
    outputs = ['PoKeMoN', 'Do nOt wAnT', 'POKEMON']

    for input, output in zip(inputs, outputs):
        if f(*input) != output:
            return "ERROR: {}!={}".format(f(*input), output)
            break
    return "TESTS PASSED"

if __name__ == "__main__":
    print(tests(pokemon_speak))