reordering scripts

reorder.py

#!/usr/bin/env python3
# Public domain

import argparse
import os
import os.path
import shutil
import sys

def reorder(directory, sorted_, recurse, verbose):
    if verbose:
        print("{}: Reordering".format(directory))
    backup = directory + '~'
    if os.path.exists(backup):
        print("{}: Exists".format(backup), file=sys.stderr)
    os.replace(directory, backup)
    os.mkdir(directory)
    for file in sorted_(os.listdir(backup)):
        target = os.path.join(directory, file)
        os.replace(os.path.join(backup, file), target)
        if verbose:
            print("{}: Moved back".format(target))
        if recurse and os.path.isdir(target):
            reorder(target, sorted_, recurse, verbose)
    os.rmdir(backup)

def main():
    parser = argparse.ArgumentParser("Reorder files in a directory")
    parser.add_argument('directories', metavar='directory', nargs='+')
    parser.add_argument('-v', '--verbose', action='store_true', default=False)
    parser.add_argument('-r', '--recursive', action='store_true',
                        default=False)
    parser.add_argument('-n', '--natsort', action='store_true', default=False)
    args = parser.parse_args()

    if args.natsort:
        from natsort import natsorted
        sorted_ = natsorted
    else:
        sorted_ = sorted
    for directory in args.directories:
        if directory.endswith('/'):
            directory = directory[:-1]
        if not os.path.isdir(directory):
            print("{}: Not a directory".format(directory), file=sys.stderr)
            continue
        reorder(directory, sorted_, args.recursive, args.verbose)

if __name__ == "__main__":
    main()

reorder.sh

#!/bin/bash
# Public domain

DIR=$1
SORT=sort
if [ -n "$(which natsort 2> /dev/null)" ]
  then SORT=natsort
fi

if [ -d "$DIR~" ]
  then printf "Directory %s~ already exists. Aborting.", $DIR
  exit 2
fi

mv "$DIR" "$DIR~"
mkdir "$DIR"
for file in $(ls "$DIR~" |$SORT)
  do mv "$DIR~/$file" "$DIR/$file"
done
rmdir "$DIR~"