rename files iteratively

rename.py

from pathlib import Path
import sys
import os


mapping = {'cz': 'czech',
            'pl': 'poland'}

start_dir = sys.argv[1]

rootdir = Path(start_dir)

# For absolute paths instead of relative the current dir
file_list = [f for f in rootdir.resolve().glob('**/*') if f.is_file()]

for f in file_list:
    dir_name = os.path.dirname(f)
    f_name = os.path.basename(f)
    org_name = f_name
    for country_code, country_name in mapping.items():
        f_name = f_name.replace(country_code, country_name)

    os.rename(os.path.join(dir_name, org_name), os.path.join(dir_name, f_name))