Simple python mass-renamer
usage: mren.py filetpe newname [-h] [-v] [-n <int>] [-d <directory>]
rename all files of chosen type in a directory.
positional arguments:
filetype choose filetype for all the files you want to rename.
newname choose new name for all files chosen.
optional arguments:
-h, --help show this help message and exit
-v, --verbose make output verbose.
-n <int>, --number <int>
set number of placeholder digits in filenumber.
default is 4. maximum is 10.
-d <directory>, --directory <directory>
Specify a directory. Default is current working
directory.