find-and-replace.py

import re
import random
import time


WORD_LIST = [
    'glibc-x86_64.tar.gz',
    'rock_pesado.mp3',
    'spotify_64bits.tar.gz',
    'firefox-x86-64.tar.gz',
]

class Timer():
    def __init__(self):
        self.start = time.time()
    def __enter__(self):
        return self
    def __exit__(self, exc_type, exc_val, exc_tb):
        end = time.time()
        runtime = end - self.start
        msg = 'The function took {time} seconds to complete'
        print(msg.format(time=runtime))

def far_without_lib(word_list):
    return [it.replace('x86_64', '64bits') for it in word_list]

def far_with_regex(word_list):
    pattern = r'x86_64'
    replace = r'64bits'

    return [re.sub(pattern, replace, it) for it in word_list]


if __name__ == "__main__":
    with Timer():
        print(far_without_lib(WORD_LIST))

    with Timer():
        print(far_with_regex(WORD_LIST))

log.txt

$ python find-and-replace.py 
['glibc-64bits.tar.gz', 'rock_pesado.mp3', 'spotify_64bits.tar.gz', 'firefox-x86-64.tar.gz']
The function took 2.7894973754882812e-05 seconds to complete
['glibc-64bits.tar.gz', 'rock_pesado.mp3', 'spotify_64bits.tar.gz', 'firefox-x86-64.tar.gz']
The function took 0.0001327991485595703 seconds to complete