pymv.py

# Renames all the files in a directory with the root filename
# To run this:
# $ python pymv.py MyFileNameRoot
# > Renaming: Screen Shot 2020-04-23 at 10.07.21 AM.png => flare0.png
  
import os
import sys
  
# Function to rename multiple files 
def main(): 
    if(len(sys.argv) < 2):
        print("Please pass filename into command")
        print("Example: python pymv.py NewFilename")
        exit()

    for count, filename in enumerate(os.listdir(".")): 
        if filename == "pymv.py":
            continue
        
        ext = filename.rsplit('.', 1)[1]
        new_name = "{}{}.{}".format(sys.argv[1],str(count), ext)

        print "Renaming: {} => {}".format(filename, new_name)
        # os.rename(filename, new_name) 

if __name__ == '__main__': 
    main()