pre-commit errors and testing exceptions

[zzeppozz]

Describe the bug

A clear and concise description of what the bug is.

To Reproduce

Run pre-commit and pytest in the main repo directory

Expected behavior

Pass all tests and produce no pre-commit errors

[zzeppozz]

Two errors are related to pre-commit actions/setup-python@v4. Bug in setup-python, Info at actions/setup-python#433 . Fix by adding with: python-version: '3.x'

[zzeppozz]

Have not found source of PytestUnraisableExceptionWarning.
3 failed, 10 errors, 387 passed

FAILED tests/test_plots/test_map_plots.py::test_create_point_heatmap_matrix_known_data
FAILED tests/test_plots/test_map_plots.py::test_create_point_heatmap_matrix_random_data
FAILED tests/test_plots/test_map_plots.py::test_plot_matrix_points - pytest.P...

ERROR tests/test_data_preparation/test_occurrence_splitter.py::test_one_dwca
ERROR tests/test_data_preparation/test_occurrence_splitter.py::test_one_csv
ERROR tests/test_data_preparation/test_occurrence_splitter.py::test_complex
ERROR tests/test_tools/test_split_occurrence_data.py::test_one_dwca - pytest....
ERROR tests/test_tools/test_split_occurrence_data.py::test_one_dwca_config_file
ERROR tests/test_tools/test_split_occurrence_data.py::test_one_csv - pytest.P...
ERROR tests/test_tools/test_split_occurrence_data.py::test_complex - pytest.P...
ERROR tests/test_tools/test_split_occurrence_data.py::test_multiple_key_fields_config
ERROR tests/test_tutorials/test_aggregate_occurrence_data.py::test_instructions_python
ERROR tests/test_tutorials/test_aggregate_occurrence_data.py::test_instructions_console_script

[zzeppozz]

pre-commit hooks pass, testing exceptions fixed (but tests must be updated and extended)