add action with python code

.github/workflows/test_action.yaml

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+# .github/workflows/test_action.yaml
+name: Test Action
+on: [push]
+
+jobs:
+  get-num-square:
+    runs-on: ubuntu-latest
+    name: Returns the number square
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Fetch num squared
+        id: get_square
+        uses: ./ # Uses an action in the root directory
+        # or use a released GitHub Action
+        # uses: shipyard/github-action/[email protected]
+        with:
+          num: 11
+      - name: Print the square
+        run: echo "${{ steps.get_square.outputs.num_squared }}"

action.yml

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+# action.yaml
+name: 'Custom GitHub Action'
+description: 'A GitHub Action that takes an input and returns the square of the number'
+inputs:
+  num:
+    description: 'Enter a number'
+    required: true
+    default: "1"
+outputs:
+  num_squared:
+    description: 'Square of the input'
+    # need to specify the extra `value` field for `composite` actions
+    value: ${{ steps.get-square.outputs.num_squared }}
+runs:
+  using: 'composite'
+  steps:
+    - name: Install Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: '3.10'  
+    - name: Install Dependencies
+      run: pip install -r requirements.txt
+      shell: bash
+    - name: Pass Inputs to Shell
+      run: |
+              echo "INPUT_NUM=${{ inputs.num }}" >> $GITHUB_ENV
+      shell: bash
+    - name: Fetch the number's square
+      id: get-square
+      run: python src/get_num_square.py
+      shell: bash