Rename by creation date

rename.py

#!/usr/bin/env python
from stat import S_ISREG, ST_CTIME, ST_MODE
import os, sys, time

def digit(input,nb):
    output=str(input)
    while(len(output)<nb):
        output="0"+output
    return output

# path to the directory (relative or absolute)
dirpath = sys.argv[1] if len(sys.argv) == 2 else r'.'

# get all entries in the directory w/ stats
entries = (os.path.join(dirpath, fn) for fn in os.listdir(dirpath))
entries = ((os.stat(path), path) for path in entries)

# leave only regular files, insert creation date
entries = ((stat[ST_CTIME], path)
           for stat, path in entries if S_ISREG(stat[ST_MODE]))
#NOTE: on Windows `ST_CTIME` is a creation date 
#  but on Unix it could be something else
#NOTE: use `ST_MTIME` to sort by a modification date

i=0
for cdate, path in sorted(entries):
    new_name="["+digit(i,3)+"] "+os.path.basename(path)
    print(new_name)
    os.rename(os.path.abspath(path),new_name)
    i+=1