Preview:
import os

os.chdir('D:\\folder1\\folder2')
files = os.listdir()
for f in files:
    new_name = f.replace('old part', 'name part')
    os.rename(f, new_name)
downloadDownload PNG downloadDownload JPEG downloadDownload SVG

Tip: You can change the style, width & colours of the snippet with the inspect tool before clicking Download!

Click to optimize width for Twitter