Deprecation warnings are raised due to invalid escape sequences. This can be fixed by using raw strings or escaping the literals. pyupgrade also helps in automatic conversion :https://github.com/asottile/pyupgrade/

find . -iname '*.py' | xargs -P4 -I{} python3.8 -Wall -m py_compile {}./tests/test_layouts.py:23: DeprecationWarning: invalid escape sequence \   '''