Batch File Renaming with Python

I bet everyone has already had this problem. You have a couple of hundreds of files (e.g. photos) and want to rename them all at once using some pattern.

I woke up today and asked myself, why not write a small python script. Here it is:

1. #!/usr/bin/env python
3. import re
4. import os
6. # regex matching the file name blablaqwe123456.txt
7. regex = '^s_Entrepreneurship_Corner_Podcasts_(\S+)(\d\d)(\d\d)(\d\d)\.(txt)$'
9. # prepare the regex
10. r = re.compile(regex)
12. # list files in the current directory
13. all = os.listdir('.')
15. for fname in all:
16. m = r.match(fname)
17. if m:
18. # extract the different parts from the old name
19. name = m.group(1)
20. year = "20" + m.group(2)
21. month = m.group(3)
22. day = m.group(4)
23. ext = m.group(5)
25. # create the new name
26. newfname = year + "-" + month + "-" + day + "-" + name + "." + ext
28. # rename the file
29. print "renaming " + fname + " to " + newfname + "..."
30. os.rename(fname, newfname)

Feel free to use it!