mypy fail test

Author: AtsushiSakai

.github/workflows/pythonpackage.yml

@@ -34,7 +34,7 @@ jobs:
       run: pip install mypy
     - name: mypy check
       run: |
-        - find . -name "*.py" | xargs mypy
+        find . -name "*.py" | xargs mypy
     - name: do all unit tests
       run: bash runtests.sh