Windows 上的 Python Matplotlib : Issue on updating matplotlib to 3. 1.2

Question

在将 Matplotlib 发布到 3.1.2 版本之后，我在更新包版本时遇到了问题。

我试过:

conda install -c conda-forge matplotlib=3.1.2在 Jupyter notebook 中(没有成功，代码在我中断之前一直运行了 20 分钟)；在 Anaconda 提示中出现以下失败结果:

(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结果如下:

(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.

并在重新启动系统和 Jupyter 后，如您所料:

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

matplotlib: 3.1.1

关于下一步可能是什么的任何想法？

提前谢谢了

Answer 1

你要么:

conda update --all

或者你尝试:

conda install matplotlib=3.1.2