all_python_files: add docstring

Author: myakove

apps/utils.py

@@ -62,6 +62,9 @@ def convert(self, cli_value, param, ctx):
 
 
 def all_python_files():
+    """
+    Get all python files from current directory and subdirectories
+    """
     exclude_dirs = [".tox", "venv", ".pytest_cache", "site-packages", ".git"]
     for root, _, files in os.walk(os.path.abspath(os.curdir)):
         if [_dir for _dir in exclude_dirs if _dir in root]: