Additional test with pandas 2.2

.github/workflows/unit_tests_pandas.yml

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+# This workflow will install Python dependencies, run tests the specified Python version
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: Python tests for pandas 2.2
+
+on:
+  push:
+    branches:
+      - develop
+      - develop-ref
+      - feature_*
+      - main_*
+      - bugfix_*
+      - issue_*
+      - gha_*
+    paths-ignore:
+      - 'docs/**'
+      - '.github/pull_request_template.md'
+      - '.github/ISSUE_TEMPLATE/**'
+      - '**/README.md'
+      - '**/LICENSE.md'
+
+
+  pull_request:
+    types: [ opened, reopened, synchronize ]
+
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: [ "3.10" ]
+
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Retrieve METcalcpy repository develop branch
+        run: |
+          /usr/bin/git clone https://github.com/dtcenter/METcalcpy
+          cd METcalcpy
+          /usr/bin/git checkout develop
+          python -m pip install -e .
+
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install pytest>=7.1.1
+          python -m pip install pytest_benchmark
+          python -m pip install netcdf4==1.6.2
+          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+          python -m pip install pandas==2.2
+      
+
+      #   Checking the branch name, not necessary but useful when setting things up.
+      #     - name: Extract branch name
+      #       shell: bash
+      #       run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"
+      #       id: extract_branch
+
+
+      - name: Test with pytest
+        run: |
+          echo "GITHUB wspace: $GITHUB_WORKSPACE"
+          export PYTHONPATH=$GITHUB_WORKSPACE/:$GITHUB_WORKSPACE/METdbLoad:$GITHUB_WORKSPACE/METdbLoad/ush:$GITHUB_WORKSPACE/METreformat:$GITHUB_WORKSPACE/METreadnc
+          echo "PYTHONPATH is $PYTHONPATH"
+          cd $GITHUB_WORKSPACE/METreformat
+          cd test
+
+          py.test test_reformatting.py -v -s --benchmark-autosave > /home/runner/work/METdataio/METdataio/METreformat/test/.benchmarks/benchmark.log
+          cd $GITHUB_WORKSPACE/METreadnc
+          cd test
+          pytest test_readnc.py
+
+          echo "Finished unit tests"
+
+      - name: Archive benchmark results
+        uses: actions/upload-artifact@v4
+        with:
+          name: benchmark-report
+          path: /home/runner/work/METdataio/METdatio/METreformat/test/.benchmarks/benchmark.log