Installing collected packages: pyflakes, pycodestyle, zipp, typing-extensions, importlib-metadata, mccabe, flake8 Successfully installed flake8-3.9.2 importlib-metadata-4.8.1 mccabe-0.6.1 pycodestyle-2.7.0 pyflakes-2.3.1 typing-extensions-3.10.0.2 zipp-3.6.0 WARNING: You are using pip version 19.2.3, however version 21.2.4 is available. You should consider upgrading via the 'pip install --upgrade pip' command. $ flake8 est $ flake8 orangecontrib orangecontrib/est/widgets/utils/noise.py:196:24: F821 undefined name 'ProcessRunnable' Cleaning up project directory and file based variables ERROR: Job failed: exit code 1