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# batch_file_rename.py
# Created: 6th August 2012
"""
This will batch rename a group of files in a given directory,
once you pass the current and new extensions
"""
# just checking
__author__ = 'Craig Richards'
__version__ = '1.0'
import os
import argparse
def batch_rename(work_dir, old_ext, new_ext):
"""
This will batch rename a group of files in a given directory,
once you pass the current and new extensions
"""
# files = os.listdir(work_dir)
for filename in os.listdir(work_dir):
# Get the file extension
split_file = os.path.splitext(filename)
file_ext = split_file[1]
# Start of the logic to check the file extensions, if old_ext = file_ext
if old_ext == file_ext:
# Returns changed name of the file with new extention
newfile = split_file[0] + new_ext
# Write the files
os.rename(
os.path.join(work_dir, filename),
os.path.join(work_dir, newfile)
)
def get_parser():
parser = argparse.ArgumentParser(description='change extension of files in a working directory')
parser.add_argument('work_dir', metavar='WORK_DIR', type=str, nargs=1,
help='the directory where to change extension')
parser.add_argument('old_ext', metavar='OLD_EXT', type=str, nargs=1, help='old extension')
parser.add_argument('new_ext', metavar='NEW_EXT', type=str, nargs=1, help='new extension')
return parser
def main():
"""
This will be called if the script is directly invoked.
"""
# adding command line argument
parser = get_parser()
args = vars(parser.parse_args())
# Set the variable work_dir with the first argument passed
work_dir = args['work_dir'][0]
# Set the variable old_ext with the second argument passed
old_ext = args['old_ext'][0]
if old_ext[0] != '.':
old_ext = '.' + old_ext
# Set the variable new_ext with the third argument passed
new_ext = args['new_ext'][0]
if new_ext[0] != '.':
new_ext = '.' + new_ext
batch_rename(work_dir, old_ext, new_ext)
if __name__ == '__main__':
main()
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