Add pylint in CI

Signed-off-by: JimmyYang20 <[email protected]>

Author: JimmyYang20

.github/workflows/main.yaml

@@ -11,6 +11,9 @@ jobs:
   verify-and-lint:
     runs-on: ubuntu-latest
     name: Verify codegen/vendor/licenses, do lint
+    strategy:
+      matrix:
+        python-version: [ "3.6" ]
     env:
       GOPATH: ${{ github.workspace }}
 
@@ -50,6 +53,16 @@ jobs:
         run: pycodestyle lib
         working-directory: ${{ env.CODE_DIR }}
 
+      - name: Set python version
+        uses: actions/setup-python@v3
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Run python lint test
+        run: |
+          python -m pip install  pylint
+          pylint lib
+        working-directory: ${{ env.CODE_DIR }}
+
   build:
     runs-on: ubuntu-latest
     name: build gm and lc