add python unittest (#487)

### 背景
> 描述这个 Pull Request 之前代码的状态

### 目标
> 描述这个 Pull Request 要完成的功能

### 其他信息
> 描述这个 Pull Request 相关的其他信息

.github/workflows/python.yaml

@@ -0,0 +1,58 @@
+name: Python
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  build_and_test_python:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.9"
+
+       # 以下步骤将在 3kctl 目录下执行
+      - name: Change to 3kctl directory
+        run: cd 3kctl
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        working-directory: 3kctl
+
+      - name: Lint with flake8
+        run: |
+          pip install flake8
+          # stop the build if there are Python syntax errors or undefined names
+          flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+          flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+        working-directory: 3kctl
+
+      - name: Test with pytest
+        run: |
+          pip install pytest
+          pytest
+        working-directory: 3kctl
+
+      - name: Test with coverage
+        run: |
+          pip install pytest-cov
+          pytest --cov=./ --cov-report=xml
+        working-directory: 3kctl
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          file: ./coverage.xml
+          fail_ci_if_error: true
+          verbose: true
+        working-directory: 3kctl

3kctl/deploy/test_utils.py

@@ -0,0 +1,33 @@
+import unittest
+from unittest.mock import mock_open, patch
+from .utils import dict_to_obj, parse_yaml, parse_ini
+
+
+class TestDictToObj(unittest.TestCase):
+
+    def test_dict_to_obj(self):
+        test_dict = {"a": 1, "b": 2}
+        obj = dict_to_obj(test_dict)
+        self.assertEqual(obj.a, 1)
+        self.assertEqual(obj.b, 2)
+
+
+class TestParseYaml(unittest.TestCase):
+
+    @patch("builtins.open", new_callable=mock_open, read_data="a: 1\nb: 2")
+    def test_parse_yaml(self, mock_file):
+        result = parse_yaml()
+        self.assertEqual(result.a, 1)
+        self.assertEqual(result.b, 2)
+
+
+class TestParseIni(unittest.TestCase):
+
+    @patch("builtins.open", new_callable=mock_open, read_data="[section]\nkey=value")
+    def test_parse_ini(self, mock_file):
+        config = parse_ini()
+        self.assertEqual(config.section.key, 'value')
+
+
+if __name__ == '__main__':
+    unittest.main()