include python

Author: kevinjqliu

.github/workflows/python-ci.yml

@@ -75,6 +75,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v5
+    - uses: actions/setup-python@v6
+      with:
+        python-version: ${{ matrix.python }}
     - name: Install system dependencies
       run: sudo apt-get update && sudo apt-get install -y libkrb5-dev # for kerberos
     - name: Install