Some problems with pip installing third-party packages

pip command example

正常安装：pip install [包名]

The following is a summary of some basic knowledge and questions about the pip install process

1. Download the specified version of the extension library without installing it

pip download [包名] [==版本]  

2. List all modules currently installed

pip list

3. Install the specified version of the module online

pip install [包名][==version]

4. Upgrade package module

pip install --upgrade [包名]

5. Uninstall the specified version of the package

pip uninstall [包名][==version]

6. If you want to install the same python package module as your classmates, you can do this

Execute the (migrate module) command in the terminal

pip freeze [> requirements.txt]

Generate requirements.txt (document name randomly named) file under user name

Then put the file in the path displayed on the terminal you opened

Execute the command to complete the installation

pip install -r requirements.txt

When you are installing the module, the following message appears

 You should enter the root directory to install (change to ./pip install [package name] to install)

If the online installation fails, you can download the compiled whl file from the http://www.lfd.uci.edu/~gohlke/pythonlibs/ extension library, and then use the pip command to install it.

Tip: Put the whl file in that path, open the terminal in that path, and execute the pip command

If access is denied during the installation of the package, you can install it as an administrator

You can also install it with the command

pip install [包名] --user