Python 3.x 无法卸载较旧版本的"；matplotlib“；使用康达

免责声明：我不是techie/Python开发人员，但正在尝试学习它&利用Jupyter笔记本中的EDA解决ML问题

团队-查找conda卸载错误消息的摘录，尽管它显示已安装的多个matplotlib版本。要么我遇到了软件包不可用（如果我卸载了最新版本3.3.2），要么安装后我无法使用它Jupyter笔记本

C:\WINDOWS\system32>conda search matplotlib

Loading channels: done
# Name                       Version           Build  Channel
matplotlib                     1.1.1      np16py27_2  repository/conda_gold_group
matplotlib                     1.2.0      np16py27_0  repository/conda_gold_group
matplotlib                     1.2.0      np16py27_1  repository/conda_gold_group
matplotlib                     1.2.0      np17py27_1  repository/conda_gold_group
matplotlib                     1.2.1      np17py27_0  repository/conda_gold_group
matplotlib                     1.2.1      np17py27_1  repository/conda_gold_group
matplotlib                     1.3.0      np17py27_0  repository/conda_gold_group
matplotlib                     1.3.1      np17py27_0  repository/conda_gold_group
matplotlib                     1.3.1      np17py27_1  repository/conda_gold_group
matplotlib                     1.3.1      np18py27_1  repository/conda_gold_group
matplotlib                     1.3.1      np18py27_2  repository/conda_gold_group
matplotlib                     1.4.0      np18py27_0  repository/conda_gold_group
matplotlib                     1.4.0      np19py27_0  repository/conda_gold_group
matplotlib                     1.4.1      np19py27_0  repository/conda_gold_group
matplotlib                     1.4.2      np19py27_0  repository/conda_gold_group
matplotlib                     1.4.3     np110py27_1  repository/conda_gold_group
matplotlib                     1.4.3     np110py27_2  repository/conda_gold_group
matplotlib                     1.4.3     np110py27_3  repository/conda_gold_group
matplotlib                     1.4.3      np19py27_0  repository/conda_gold_group
matplotlib                     1.4.3      np19py27_1  repository/conda_gold_group
matplotlib                     1.4.3      np19py27_3  repository/conda_gold_group
matplotlib                     1.5.0     np110py27_0  repository/conda_gold_group
matplotlib                     1.5.1     np110py27_0  repository/conda_gold_group
matplotlib                     1.5.1     np111py27_0  repository/conda_gold_group
matplotlib                     1.5.3     np111py27_0  repository/conda_gold_group
matplotlib                     1.5.3     np111py27_1  repository/conda_gold_group
matplotlib                     1.5.3     np111py36_1  repository/conda_gold_group
matplotlib                     2.0.0     np111py27_0  repository/conda_gold_group
matplotlib                     2.0.0     np111py36_0  repository/conda_gold_group
matplotlib                     2.0.0     np112py27_0  repository/conda_gold_group
matplotlib                     2.0.0     np112py36_0  repository/conda_gold_group
matplotlib                     2.0.1     np111py27_0  repository/conda_gold_group
matplotlib                     2.0.1     np111py36_0  repository/conda_gold_group
matplotlib                     2.0.1     np112py27_0  repository/conda_gold_group
matplotlib                     2.0.1     np112py36_0  repository/conda_gold_group
matplotlib                     2.0.2     np111py27_0  repository/conda_gold_group
matplotlib                     2.0.2     np111py36_0  repository/conda_gold_group
matplotlib                     2.0.2     np112py27_0  repository/conda_gold_group
matplotlib                     2.0.2     np112py36_0  repository/conda_gold_group
matplotlib                     2.0.2     np113py27_0  repository/conda_gold_group
matplotlib                     2.0.2     np113py36_0  repository/conda_gold_group
matplotlib                     2.0.2  py27hd2e917d_1  repository/conda_gold_group
matplotlib                     2.0.2  py36h58ba717_1  repository/conda_gold_group
matplotlib                     2.1.0  py27h86412ea_0  repository/conda_gold_group
matplotlib                     2.1.0  py36h11b4b9c_0  repository/conda_gold_group
matplotlib                     2.1.1  py27h3be7b3c_0  repository/conda_gold_group
matplotlib                     2.1.1  py36h2062329_0  repository/conda_gold_group
matplotlib                     2.1.2  py27ha51faf0_0  repository/conda_gold_group
matplotlib                     2.1.2  py36h016c42a_0  repository/conda_gold_group
matplotlib                     2.2.0  py27hf8772e1_0  repository/conda_gold_group
matplotlib                     2.2.0  py36h4dabdea_0  repository/conda_gold_group
matplotlib                     2.2.2  py27h8803d4e_0  repository/conda_gold_group
matplotlib                     2.2.2  py27h8803d4e_1  repository/conda_gold_group
matplotlib                     2.2.2  py36h153e9ff_0  repository/conda_gold_group
matplotlib                     2.2.2  py36h153e9ff_1  repository/conda_gold_group
matplotlib                     3.0.3          py36_0  repository/conda_gold_group
matplotlib                     3.3.2  py36h9f0ad1d_1  repository/conda_gold_group

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打开cmd并使用命令

conda remove package\u name--yes

或者，如果您不喜欢环境，请使用

conda remove-n环境包\u name--yes

资料来源：

尽管它显示多个已安装的matplotlib版本

您在

conda search

所做的事情上犯了错误。它只显示您可以安装的所有版本，即哪些版本可从您的操作系统配置的频道获得，这在某种程度上等同于使用anaconda.org上的搜索功能

您想到的命令是

conda list

（），它显示当前安装的软件包列表

因此，您当前可能没有安装matplotlib，因为您的卸载命令会产生

PackagesNotFoundError: The following packages are missing from the target environment:
  - matplotlib

现在，您只需安装所需的版本，即对于2.12，只需执行以下操作即可

conda install matplotlib=2.12

或者您可能需要的任何其他版本

conda install matplotlib=2.12