Fixing python tests (#428)

* Retrying to fix python tests

* Updating path

* fixing path

* fixing spaces

.github/workflows/python.yaml

@@ -42,6 +42,7 @@ jobs:
         working-directory: "python"
       - name: Run tests
         run: |
+          source .venv/bin/activate
           pytest tests
         working-directory: "python"
   build: