The purpose and advantages of switching sources

Why use pip to change sources? What are its benefits?

In the process of developing using Python, we often use the pip package management tool to install, upgrade and uninstall various Python packages. However, due to network reasons, sometimes we may encounter pip installation packages that are very slow or even fail. In order to solve this problem, we can use pip to change the source and change the default source to a domestic source. This article will introduce why you should use pip to change sources and its benefits, and give specific code examples.

Why use pip to change sources?

1. Improve installation speed: By default, pip will use the official source (https://pypi.org/simple/) to download packages. However, since the official source may be on an overseas server, the download speed may be very slow, especially in a domestic network environment. Therefore, using domestic sources can speed up package downloads and save time.
2. Troubleshooting connection issues: Sometimes, connecting to the official source may fail due to network issues or server issues. As a result, we cannot use pip to install the package normally. Using domestic sources can reduce the probability of connection failure and ensure that we can successfully download the required packages.
3. Faster update speed: Domestic sources generally mirror commonly used packages and provide them to users after optimization and synchronization. This means that domestic sources will be updated faster, and we can get the latest packages and versions in a timely manner.

Benefits of pip source change:

1. Accelerate dependency installation: During development, we may use many third-party packages. Using domestic sources can greatly speed up package installation and avoid long waits.
2. Support virtual environment: Virtual environment is a commonly used tool in Python development. It can help us manage the dependencies of multiple projects in one system at the same time. Using domestic sources can make the installation of packages in the virtual environment faster and more stable.
3. Ensure the stability of the project: During the development process, we may encounter situations where some packages cannot be found in the official sources or fail to download. Domestic sources can provide more stable and reliable download services to ensure that project dependencies can be installed normally.

The following are some common domestic sources:

1. Alibaba Cloud: https://mirrors.aliyun.com/pypi/simple/
2. Tsinghua University University: https://pypi.tuna.tsinghua.edu.cn/simple/
3. University of Science and Technology of China: https://pypi.mirrors.ustc.edu.cn/simple/

Next, I will give specific code examples to show how to use pip to change sources.

1. Use Alibaba Cloud Source:

Execute the following command in the terminal:

pip config set global.index-url https://mirrors.aliyun.com/pypi/simple/

2. Use Tsinghua Source:

Execute the following command in the terminal:

pip config set global.index-url https://pypi.tuna.tsinghua.edu.cn/simple/

3. Use the University of Science and Technology of China source:

Execute the following command in the terminal:

pip config set global.index-url https://pypi.mirrors.ustc.edu.cn/simple/

Note : The above command will modify the global configuration file of pip to the specified source. If you only want to take effect on the current virtual environment, you can change global to --user or execute the above command in the virtual environment.

Summary:

Using pip to change sources can speed up package installation, solve connection problems, and ensure the stability of the project. By modifying the global configuration file of pip, we can easily switch to domestic sources. Whether developing new projects or maintaining existing projects, using domestic sources can provide us with a better development experience.

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