Python Matplotlib: Issue on updating matplotlib to 3.1.2 on windows

Question

Following the release of Matplotlib to the 3.1.2 version I am having issues updating my package version.

I tried:

• conda install -c conda-forge matplotlib=3.1.2 in Jupyter notebook (Without success, the code kept running for 20 mins before I interrupted); in the Anaconda prompt with the following failed result:

(base) C:\Users\Adrien>conda install -c conda-forge matplotlib=3.1.2 Collecting package metadata (current_repodata.json): done Solving environment: failed with initial frozen solve. Retrying with flexible solve. Collecting package metadata (repodata.json): done Solving environment: failed with initial frozen solve. Retrying with flexible solve. Solving environment: | Found conflicts. Looking for incompatible packages. This can take several minutes. Press CTRL-C to abort. failed

• conda update matplotlib with the following result:

(base) C:\Users\Adrien>conda update matplotlib Collecting package metadata (current_repodata.json): done Solving environment: /

Updating matplotlib is constricted by

anaconda -> requires matplotlib==3.1.1=py37hc8f65d3_0

If you are sure you want an update of your package either try conda update --all or install a specific version of the package you want using conda install <pkg>=<version>

done

Package Plan

environment location: C:\Users\Adrien\Anaconda3

added / updated specs: - matplotlib

The following packages will be downloaded:

 package | build ---------------------------|----------------- backports.functools_lru_cache-1.6.1| py_0 11 KB conda-4.8.3 | py37_0 2.8 MB future-0.18.2 | py37_0 656 KB ------------------------------------------------------------ Total: 3.5 MB

The following packages will be UPDATED:

backports.functoo~ 1.5-py_2 --> 1.6.1-py_0 conda 4.8.2-py37_0 --> 4.8.3-py37_0 future 0.17.1-py37_0 --> 0.18.2-py37_0

Proceed ([y]/n)? y

Downloading and Extracting Packages conda-4.8.3 | 2.8 MB |

################################################################## | 100% future-0.18.2 | 656 KB | ################################################################## | 100% backports.functools_ | 11 KB | ################################################################## | 100% Preparing transaction: done Verifying transaction: done

Executing transaction: done

(base) C:\Users\Adrien>import matplotlib 'import' is not recognized as an internal or external command, operable program or batch file.

And after restarting the system and Jupyter as you guess:

import matplotlib
print('matplotlib: {}'.format(matplotlib.__version__))

matplotlib: 3.1.1

Any idea on what could be the next step?

Many thanks in advance

Answer 1

Either you do:

conda update --all

or you try:

conda install matplotlib=3.1.2