Python list all files in dir recursivelly

import osidx=0
def list_dir_files(dir_name):global idxif os.path.exists(dir_name):all_items=os.listdir(dir_name)for item in all_items:full_path=os.path.join(dir_name,item)if os.path.isfile(full_path):idx+=1print('file:',idx,os.path.join(dir_name,item))elif os.path.isdir(full_path): print("dir:",full_path)list_dir_files(full_path)if __name__=="__main__":dir=r"D:\C"list_dir_files(dir)