Create check.yml.

.github/workflows/check.yml

@@ -0,0 +1,21 @@
+name: Check
+
+on: [push]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+        pip install flake8
+    - name: Analysing the code with flake8
+      run: |
+        flake8 $(git ls-files '*.py')