How to install a specified version with pip

Steps to install the specified version with pip: 1. Determine the exact version number of the Python package you want to install, and find the version information of the specific package on the PyPI website; 2. In the terminal or command prompt, use "pip Install example_package==1.2.3" command can install a specific version of the Python package.

The operating system of this tutorial: windows10 system, Python3.11.4, DELL G3 computer.

Using pip to install a specific version of a Python package is a common task, especially when you need to ensure compatibility or use features of a specific version. The following are detailed steps on how to use pip to install a specified version of a Python package.

Step 1: Determine the version of the package

First, you need to determine the exact version number of the Python package you want to install. It can be found in PyPI (Python Package Index) website to find version information for a specific package. Suppose the package you want to install is example_package, and you want to install version 1.2.3.

Step 2: Use pip to install the specified version

In the terminal or command prompt, use the following command to install the specific version of the Python package:

pip install example_package==1.2.3

In this command, example_package is the name of the package you want to install, and 1.2.3 is the specific version number you want to install. Make sure to separate the package name and version number with a double equal sign ==, and make sure the version number matches the exact version you want to install.

Use pip install to install other versions

You can also use some other tags to install specific versions of Python packages. The following are some commonly used tags:

• >=: indicates a package greater than or equal to the specified version, used to install the specified version and subsequent versions.

• <=: Indicates packages less than or equal to the specified version, used to install the specified version and its previous versions.

• >: Indicates a package greater than the specified version, used to install versions after the specified version.

• <: Indicates a package that is smaller than the specified version and is used to install a version earlier than the specified version.

For example, if you want to install the example_package version greater than or equal to 1.2.3, you can use the following command:

pip install example_package>=1.2.3

Confirm the installed version

After the installation is complete, you can confirm the version of the installed package through the following command:

pip show example_package

This will display the information of the installed example_package package, including the version number. Make sure you install the specific version you want.

Downgrade or upgrade the version of the package

If you need to downgrade or upgrade the version of the installed package, you can use pip install command and specify the new version number. For example, if you want to upgrade the example_package package to version 2.0.0, you can use the following command:

pip install --upgrade example_package==2.0.0

If you want to downgrade to an older version, you can use the following command:

pip install example_package==1.0.0

Conclusion

Using pip to install a specific version of a Python package is a simple and common task. You can easily install, upgrade, or downgrade a specific version of a Python package by following the steps above to determine the version of the package and using the appropriate pip command. This helps ensure that your Python project uses a specific version of a package that is compatible with what you expect.

The above is the detailed content of How to install a specified version with pip. For more information, please follow other related articles on the PHP Chinese website!