Error importing copulas.visualization due to removal of checkdep_ghostscript in matplotlib>=3.3.0

[vinhloc30796]

Environment Details

Please indicate the following details about the environment in which you found the bug:

• Copulas version: 0.5.0
• Python version: 3.8.5
• Operating System: Windows 10

Error Description

Trying to import copulas with matplotlib==3.3.4, which doesn't succeed due to ImportError.

It seems like matplotlib has removed checkdep_ghostscript required for matplotlib.use('PS') starting from matplotlib>=3.3.0 https://github.com/matplotlib/matplotlib/blob/7303d81eb2390208d3bac67dd51d390b585e411f/doc/api/prev_api_changes/api_changes_3.3.0/removals.rst

Steps to reproduce

from copulas.bivariate import Clayton
from copulas.visualization import compare_3d

returns traceback:

---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-82-b1eb6fe857f6> in <module>
     12 # Copulas sdv-dev/Copulas
     13 from copulas.bivariate import Clayton
---> 14 from copulas.visualization import compare_3d

C:\ProgramData\Anaconda3\lib\site-packages\copulas\visualization.py in <module>
      3 from mpl_toolkits import mplot3d  # noqa: importing this fixes import error in py35
      4 
----> 5 matplotlib.use('PS')   # Avoid crash on macos
      6 import matplotlib.pyplot as plt   # noqa isort:skip
      7 

C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\__init__.py in use(backend, force)
   1169         If True, initialize with default parameters before updating with those
   1170         in the given file. If False, the current configuration persists
-> 1171         and only the parameters specified in the file are updated.
   1172 
   1173     """

C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\pyplot.py in switch_backend(newbackend)
    274     return matplotlib.is_interactive()
    275 
--> 276 
    277 def ioff():
    278     """Turn the interactive mode off."""

C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\pyplot.py in backend_mod()
    275 
    276 
--> 277 def ioff():
    278     """Turn the interactive mode off."""
    279     matplotlib.interactive(False)

C:\ProgramData\Anaconda3\lib\importlib\__init__.py in import_module(name, package)
    125                 break
    126             level += 1
--> 127     return _bootstrap._gcd_import(name[level:], package, level)
    128 
    129 

C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\backends\backend_ps.py in <module>
     19 
     20 import matplotlib as mpl
---> 21 from matplotlib import (
     22     cbook, _path, __version__, rcParams, checkdep_ghostscript)
     23 from matplotlib.backend_bases import (

ImportError: cannot import name 'checkdep_ghostscript' from 'matplotlib' (C:\ProgramData\Anaconda3\lib\site-packages\matplotlib\__init__.py)