importing filename and using regex to change the filename and save back-CodePudding

I have files with filenames as "lsud-ifgufib-1234568789.png" I want to rename this file as digits only which are followed by last "-" and then save them back in the folder.

Basically I want the final filename to be the digits that are followed by "-".

~  path = 'C:/Users/abc/downloads'
  for filename in os.listdir(path):
      r = re.compile("(\d )")
      newlist = filter(r.match, filename) 
      print(newlist)

~ How do I proceed further?

CodePudding user response：

You could try a regex search followed by a path join:

import re
import os

path = 'C:/Users/abc/downloads'
for filename in os.listdir(path):
    os.rename(filename, os.path.join(path, re.search("\d (?=\D ?$)", filename).group()))

CodePudding user response：

import re
import pathlib

fileName = "lsud-ifgufib-1234568789.png"
_extn = pathlib.Path(fileName).suffix

_digObj = re.compile(r'\d ')
digFileName = ''.join(_digObj.findall(fileName))

replFileName = digFileName   _extn

CodePudding user response：

Assumptions:

You want to rename files if the file has a hyphen before the number.
The file may or may not have an extention.
If the file has an extention, preserve it.

Then would you please try the following:

import re, os

path = 'C:/Users/abc/downloads'
for filename in os.listdir(path):
    m = re.search(r'.*-(\d .*)', filename)
    if (m):
        os.rename(os.path.join(path, filename), os.path.join(path, m.group(1)))