(tensorflow) C:\Users\lihaoran>conda install pydot-ng Collecting package metadata (current_repodata.json): done Solving environment: failed with initial frozen solve. Retrying with flexible solve. Solving environment: failed with repodata from current_repodata.json, will retry with next repodata source. 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 UnsatisfiableError: The following specifications were found to be incompatible with the existing python installation in your environment: Specifications: - pydot-ng -> python[version='2.7.*|3.4.*'] Your python: python=3.7 If python is on the left-most side of the chain, that's the version you've asked for. When python appears to the right, that indicates that the thing on the left is somehow not available for the python version you are constrained to. Note that conda will not change your python version to a different minor version unless you explicitly specify that.

这个错误是因为你的当前环境是 Python 3.7，但是 `pydot-ng` 要求 Python 版本为 2.7 或 3.4。你可以尝试在创建一个新的虚拟环境，并指定 Python 版本为 3.6 或以下版本，然后在该环境下安装 `pydot-ng`。你可以使用以下命令创建一个名为 `env_name` 的虚拟环境，并指定 Python 版本为 3.6：

conda create -n env_name python=3.6

然后激活该环境并安装 `pydot-ng`：

conda activate env_name
conda install pydot-ng

这样应该就可以成功安装了。

相关问题

conda install opencv-python Collecting package metadata (current_repodata.json): done

根据提供的引用内容，当使用conda安装包时，可能会出现"Collecting package metadata (current_repodata.json): failed"的错误。这个错误通常是由于conda无法获取到正确的包元数据导致的。为了解决这个问题，可以尝试更换conda源。

以下是更换conda源的方法：

conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/msys2/
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/
conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
conda config --set show_channel_urls yes

这些命令将会将conda源更换为清华大学镜像源，这通常可以解决"Collecting package metadata (current_repodata.json): failed"的问题。

现在回答你的问题，当你运行"conda install opencv-python"时，如果之前更换了conda源并且成功配置，那么conda将会尝试从清华大学镜像源中获取并安装"opencv-python"包。

(base) PS C:\Users\HP> conda install openpyxl Collecting package metadata (current_repodata.json): done Solving environment: done

Openpyxl是一个用于读写Excel文件的Python库。它提供了一组功能强大的API，可以让你轻松地操作Excel文件，包括创建、修改和保存Excel文件。你可以使用conda来安装openpyxl库，具体的安装命令如下：

conda install openpyxl

安装完成后，你就可以在Python中使用openpyxl库来处理Excel文件了。