Fix warnings

[rouille]

Pull Request doc

Purpose

Fix warnings raised by our test suite. Went from 130 warnings down to 7.

What the code is doing

Most warnings come from pandas. These were:

* FutureWarning: Passing a set as an indexer is deprecated and will raise in a future version. Use a list instead
* FutureWarning: The frame.append method is deprecated and will be removed from pandas in a future version. Use pandas.concat instead.
* SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame
* FutureWarning: Passing method to Int64Index.get_loc is deprecated and will raise in a future version. Use index.get_indexer([item], method=...) instead.

Remaining warnings come from from third party packages and a user warning, see below:

.tox/pytest-local/lib/python3.9/site-packages/pypsa/descriptors.py:31
  /Users/brdo/CEM/PowerSimData/.tox/pytest-local/lib/python3.9/site-packages/pypsa/descriptors.py:31: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
    _nx_version = StrictVersion(nx.__version__)

.tox/pytest-local/lib/python3.9/site-packages/pypsa/linopf.py:37
  /Users/brdo/CEM/PowerSimData/.tox/pytest-local/lib/python3.9/site-packages/pypsa/linopf.py:37: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
    pd_version = LooseVersion(pd.__version__)

.tox/pytest-local/lib/python3.9/site-packages/setuptools/_distutils/version.py:351
  /Users/brdo/CEM/PowerSimData/.tox/pytest-local/lib/python3.9/site-packages/setuptools/_distutils/version.py:351: DeprecationWarning: distutils Version classes are deprecated. Use packaging.version instead.
    other = LooseVersion(other)

powersimdata/design/investment/tests/test_investment_costs.py::test_calculate_gen_inv_costs_not_summed
  /Users/brdo/CEM/PowerSimData/powersimdata/design/investment/investment_costs.py:471: UserWarning: No cost data available for Nuclear for Advanced cost case, using Moderate cost case data instead
    warnings.warn(

powersimdata/input/tests/test_export_to_pypsa.py::test_export_grid_to_pypsa
powersimdata/input/tests/test_export_to_pypsa.py::test_export_grid_to_pypsa
powersimdata/input/tests/test_export_to_pypsa.py::test_export_grid_to_pypsa
  /Users/brdo/CEM/PowerSimData/.tox/pytest-local/lib/python3.9/site-packages/pypsa/components.py:701: FutureWarning: The frame.append method is deprecated and will be removed from pandas in a future version. Use pandas.concat instead.
    new_df = cls_df.append(obj_df, sort=False)

-- Docs: https://docs.pytest.org/en/stable/warnings.html

Testing

Run tox successfully

Where to look

Several modules are concerned. No major refactoring, only converting set to list, etc. The largest change is using get_indexer() in place of get_loc().

Usage Example/Visuals

N/A

Time estimate

5 min

[BainanXia]

What happens with the linter?

[jenhagg]

What happens with the linter?

It's installing a newer version of click which it seems black isn't compatible with. Aaaand it's fixed by black 20 minutes ago https://github.com/psf/black/releases/tag/22.3.0

[BainanXia]

Thanks!