pip基本命令

1. Install a Package:

   • Command: pip install package_name
   • Usage: Installs the specified package. You can also specify a version number with package_name==version_number.

2. Install Packages from a Requirements File:

   • Command: pip install -r requirements.txt
   • Usage: Installs all the packages listed in the specified requirements file (requirements.txt is a common filename).

3. Upgrade a Package:

   • Command: pip install --upgrade package_name
   • Usage: Upgrades the specified package to the latest version.

4. Uninstall a Package:

   • Command: pip uninstall package_name
   • Usage: Uninstalls the specified package from the environment.

5. List Installed Packages:

   • Command: pip list
   • Usage: Lists all packages installed in the current environment along with their versions.

6. Show Information about a Package:

   • Command: pip show package_name
   • Usage: Displays detailed information about a specific package, including its version, dependencies, and location.

7. Search for a Package:

   • Command: pip search search_term
   • Usage: Searches the Python Package Index (PyPI) for packages whose name or summary contains the search term.

8. Freeze Installed Packages:

   • Command: pip freeze
   • Usage: Outputs a list of all installed packages in a requirements format. Often used to create a requirements.txt file.

9. Check for Packages with Known Issues:

   • Command: pip check
   • Usage: Checks for installed packages with known issues, such as broken dependencies.

10. Download a Package:

    • Command: pip download package_name
    • Usage: Downloads a package and its dependencies but does not install them.

11. Install a Package at a Specific Version:

    • Command: pip install package_name==version_number
    • Usage: Installs a specific version of a package.

12. Upgrade pip Itself:

    • Command: pip install --upgrade pip
    • Usage: Upgrades pip to the latest version.