Python: batch modify the suffix of pictures

1 New in the picture folder py Script rename.py

import os
# Want to change the root directory where the picture is located
rootdir="./"
# Get the list of file names in the directory
files=os.listdir(rootdir)
# Process each file name in the file name list
for filename in files:
portion=os.path.splitext(filename) #portion Separate the list of names and suffixes #os.path.splitext() Separate the file name from the extension
if portion[1]==".bmp": # If tiff Then change the name
newname=portion[0]+".jpg" # New suffix to be changed # A new name
print(filename) # Print out the file name you want to change
os.chdir(rootdir) # Modify the work path
os.rename(filename,newname) # Rename the file name under the working path 

2 stay cmd Window run rename.py

Input cmd open windows

rename.py 

perhaps

python rename.py

  Successful transformation

If it is Shift+ Right click The open powershell Window  

python rename.py