Reuse example virtual env

.github/workflows/ci.yml

@@ -318,9 +318,15 @@ jobs:
           dora start dataflow.yml --name ci-python-test
           sleep 10
           dora stop --name ci-python-test  --grace-duration 5s
-          pip install -r ../examples/python-dataflow/requirements.txt
-          dora start ../examples/python-dataflow/dataflow_dynamic.yml --name ci-python-dynamic
-          python ../examples/python-dataflow/plot_dynamic.py
+          cd ..
+          if [ ! -d "examples/.env/bin" ]; then # Reuse Example venv
+            mv examples/.env/Scripts examples/.env/bin    # venv is placed under `Scripts` on Windows
+          fi
+          source examples/.env/bin/activate
+          dora destroy # Restart the daemon with the current virtual environment 
+          dora up 
+          dora start examples/python-dataflow/dataflow_dynamic.yml --name ci-python-dynamic
+          python examples/python-dataflow/plot_dynamic.py
           sleep 5
           dora stop --name ci-python-test  --grace-duration 5s
           dora destroy