Append and Prepend, a pair of simple scripts to append or prepend text to a set of filenames

append.py

#!/usr/bin/python3
help = """Simple script to append text to specified files before the extension
usage: append (-n)(-i) "text to append" files
   -n: dry-run, will show before and after filenames without making changes
   -i: ignore file extensions and just append to the end of the filename

   append " (2017)" *.docx
        'outline.docx' -> 'outline (2017).docx'

   append -i ".(DRAFT)" *
        'plans.for.2019' -> 'plans.for.2019.(DRAFT)''

   append \ \(Finished\ reading\) *.epub
        'amazing stories.epub' -> 'amazing stories (Finished reading).epub'
"""
import sys
from sys import argv as args
import os

if len(args) < 3:
    print(help)
    sys.exit(0)
dry_run = False
extensions = True
action = 'Renaming'
if '-n' in args:
    action = 'Would have renamed'
    print('Dry-run enabled. No files will be changed.')
    dry_run = True
    args.remove('-n')
if '-i' in args:
    print('ignoring extensions in filenames.')
    extensions = False
    args.remove('-i')

append_string = args[1]
files = args[2:]

for f in files:
    before = f
    if extensions and '.' in before:
        name, ext = before.rsplit('.', 1)
        after = f'{name}{append_string}.{ext}'
    else:
        after = f'{before}{append_string}'
    print(f'{action}: \'{before}\' -to- \'{after}\'')
    if not dry_run:
        os.rename(before, after)

prepend.py

#!/usr/bin/python3
help = """Simple script to prepend text to specified files
usage: prepend (-n) "text to prepend" files
   -n: dry-run, will show before and after filenames without making changes

   prepend "Project 1 - " *.docx
        'outline.docx' -> 'Project 1 - outline.docx'

   prepend \(Finished\ reading\)\  *.epub
        'amazing stories.epub' -> '(Finished reading) amazing stories.epub'
"""
import sys
from sys import argv as args
import os

if len(args) < 3:
    print(help)
    sys.exit(0)
dry_run = False
action = 'Renaming'
if '-n' in args:
    action = 'Would have renamed'
    print('Dry-run enabled. No files will be changed.')
    dry_run = True
    args.remove('-n')

prepend_string = args[1]
files = args[2:]

for f in files:
    before = f
    after = f'{prepend_string}{f}'
    print(f'{action}: \'{before}\' -to- \'{after}\'')
    if not dry_run:
        os.rename(before, after)