Greetings. We (the group that I work with) have "inherited" some Python
scripts that were written years ago, using Python 2.
We're trying to upgrade the scripts so that they work in our current
environment:
OS: Ubuntu 24.04.2 LTS
$ python --version
Python 3.11.13
>>> matplotlib.__version__
'3.10.0'
The first script that we looked at has a line:
cs = plt.contourf(X, Y, data, LevelsNumber,
cmap=plt.cm.nipy_spectral, norm=norm).collections
If I run that script with python 3, I get a warning:
MatplotlibDeprecationWarning: The collections attribute was
deprecated in Matplotlib 3.8 and will be removed two minor
releases later.
cmap=plt.cm.nipy_spectral, norm=norm).collections
I also get the following error:
paths = cs.get_paths()
^^^^^^^^^^^^
AttributeError: 'list' object has no attribute 'get_paths'
The "paths" object that I get appears to be no more than a collection of
geometric factors, i.e., without additional attributes such as color, for
instance, and statements such as the following fail:
bgra_array = 255*paths[i].get_facecolor()[0]
AttributeError: 'Path' object has no attribute 'get_facecolor'
Unfortunately, all the suggestions that I've found to remedy this suggest
using the "collections" attribute, which is already in the code, and which as
I noted above, has been deprecated (maybe eliminated -- 3.10 vs. 3.8) now.
If you have any suggestions about this, please pass 'em along. Thanks.
-- Michael
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