changed pylint workflow to use poetry and fixed the test files

.github/workflows/pylint.yml

@@ -14,10 +14,15 @@ jobs:
       uses: actions/setup-python@v3
       with:
         python-version: ${{ matrix.python-version }}
-    - name: Install dependencies
+    - name: Install Poetry
       run: |
-        python -m pip install --upgrade pip
-        pip install pylint
-    - name: Analysing the code with pylint
+        curl -sSL https://install.python-poetry.org | python3 -
+        echo "export PATH=$HOME/.local/bin:$PATH" >> $GITHUB_ENV
+
+    - name: Install dependencies using Poetry
+      run: |
+        poetry install
+
+    - name: Run Pylint
       run: |
-        pylint $(git ls-files '*.py')
+        poetry run pylint $(git ls-files '*.py')

test/test_validation.py

@@ -9,6 +9,6 @@ def test_length_of_container_number():
     """Test if the length of the container number is 11"""
     container_number = "MSFU8626370"  # A valid 11-character container number
     is_valid = ctn.validate_container_number(container_number)
-    
+
     assert len(container_number) == 11
     assert is_valid is True