Rename DJI images

rename.py

#!/usr/bin/env python3

#    ________  ____  ____ _____ ___  ___
#   / ___/ _ \/ __ \/ __ `/ __ `__ \/ _ \
#  / /  /  __/ / / / /_/ / / / / / /  __/
# /_/   \___/_/ /_/\__,_/_/ /_/ /_/\___/

"""
Replace a character from 'old' to 'new' at specific 'index'

Basic usage:

    >>> python rename.py -i 4 -c 1 -e jpg
"""

import pathlib
import argparse


parser = argparse.ArgumentParser(description='Process some integers.')
parser.add_argument('--index', '-i', required=True, type=int, help='index')
parser.add_argument('--character', '-c', required=True, help='character')
parser.add_argument('--extension', '-e', required=True, help='extension')

args = parser.parse_args()

index = args.index
character = args.character
extension = args.extension

pattern = f'*.{extension}' if extension else '*'
files = pathlib.Path().glob(pattern)

for file in files:
    if file.is_file():
        old_stem = file.stem
        try:
            old_extension = file.suffix
            new_stem = old_stem[:index] + character + old_stem[index+1:]
            file.rename(pathlib.Path('.', new_stem + old_extension))
        except IndexError as err:
            print(err)
        except FileExistsError as err:
            print(err)