Update types.FunctionType to Callable

[hoxbro]

Fixes #5635

When running the test locally with the nightly Numpy build, I get the following errors, which need to be investigated. I will do it when a more stable dev release is released.

FAILED holoviews/tests/core/test_apply.py::test_nested_widgets - AttributeError: 'df_dim' object has no attribute 'ops'
FAILED holoviews/tests/core/test_apply.py::test_slice_iloc - AttributeError: 'dim' object has no attribute 'ops'
FAILED holoviews/tests/core/test_apply.py::test_slice_loc - AttributeError: 'dim' object has no attribute 'ops'
FAILED holoviews/tests/plotting/bokeh/test_elementplot.py::TestOverlayPlot::test_clim_percentile - AttributeError: 'dim' object has no attribute 'ops'
FAILED holoviews/tests/util/test_transform.py::TestDimTransforms::test_cumsum_transform - AttributeError: 'dim' object has no attribute 'ops'
FAILED holoviews/tests/util/test_transform.py::TestDimTransforms::test_max_transform - AttributeError: 'dim' object has no attribute 'ops'
FAILED holoviews/tests/util/test_transform.py::TestDimTransforms::test_min_transform - AttributeError: 'dim' object has no attribute 'ops'
FAILED holoviews/tests/util/test_transform.py::TestDimTransforms::test_pandas_chained_methods - AttributeError: 'df_dim' object has no attribute 'ops'
FAILED holoviews/tests/util/test_transform.py::TestDimTransforms::test_std_transform - AttributeError: 'dim' object has no attribute 'ops'
FAILED holoviews/tests/util/test_transform.py::TestDimTransforms::test_sum_transform - AttributeError: 'dim' object has no attribute 'ops'
FAILED holoviews/tests/util/test_transform.py::TestDimTransforms::test_var_transform - AttributeError: 'dim' object has no attribute 'ops'
FAILED holoviews/tests/util/test_transform.py::TestDimTransforms::test_xarray_coarsen_method - AttributeError: 'xr_dim' object has no attribute 'ops'

The error is coming from here:

holoviews/holoviews/util/transform.py

Line 312 in df71c8c

ops = super().__getattribute__('ops')

[codecov-commenter]

Codecov Report

Merging #5636 (df71c8c) into main (4e83af3) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #5636   +/-   ##
=======================================
  Coverage   88.26%   88.26%           
=======================================
  Files         302      302           
  Lines       62517    62517           
=======================================
  Hits        55180    55180           
  Misses       7337     7337           

Impacted Files	Coverage Δ
holoviews/plotting/bokeh/hex_tiles.py	94.73% <100.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[djhoese]

I can confirm this fixes the issue I was running into. Thanks so much for a quick fix. Any idea on a release timeline that will include this?

[hoxbro]

No imminent release is planned, but A dev release could be done this week.

[djhoese]

Ok, our tests that were failing weren't installing dev versions of holoviz packages so this isn't urgent for us. We'll just have to wait for the full release. If numpy's change is released with numpy 1.25.0 then it probably won't be a problem until July (https://github.com/numpy/numpy/milestone/113).