fix import error

.github/workflows/python-app.yml

@@ -23,7 +23,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install flake8 pyqt5 pytest-qt nixio matplotlib
+        pip install flake8 pyqt5 pytest-qt nixio matplotlib ipython
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
     - name: Lint with flake8
       run: |