Undefined names in pycodesign.py

[cclauss]

$ flake8 . --count --select=E9,F63,F7,F82,Y --show-source --statistics

./pycodesign.py:120:31: F821 undefined name 'args'
        print(f'Config file "{args.config}" is missing values:')
                              ^
./pycodesign.py:121:32: F821 undefined name 'missing_values'
        for section, values in missing_values.items():
                               ^
2     F821 undefined name 'args'
2