Renaming files with date in python

Question

I would like to rename files from one folder and send them to another one, but I wanted it to contain the date or at least put a number after the name if I already had one. The code is this below, but since there are several files I need to change to the same folder, I would change to put the date at the end of the name or an increasing number?

os.rename('C:/scrapy/' + 'conta-completa.pdf','C:/scrapy/teste1/' + 'Teste.pdf')

Answer 1

My advice is to simply rename increasingly, as putting the date as suffix/prefix (eg dd-mm-yyy_hh:mm:ss) in a cycle like this example would risk many files with equal names (would be changed in the same second or even millisecond):

As a comment I realized that maybe you have to run this over and over again, so you need to get the last one n of the last file changed to rename the first one as (n+1)_foo.pdf:

import os

original_dir = 'caminho/para/pasta/original'
files = os.listdir(original_dir) # todos os ficheiros

last_num = max(int(i.split('_', 1)[0]) for i in files if '_' in i) # ultimo numero
no_changed_files = (i for i in files if '_' not in i) # ficheiros ainda nao mudados
for n, file_name in enumerate(no_changed_files, last_num + 1): # renomear os que ainda nao foram
    full_path = os.path.join(original_dir, file_name)
    if (os.path.isfile(full_path)): # se for ficheiro
        os.rename(full_path, '{}/{}_{}'.format(original_dir, n, file_name))