pip基本命令

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.

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).

Upgrade a Package:

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

Uninstall a Package:

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

List Installed Packages:

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

Show Information about a Package:

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

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.

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.

Check for Packages with Known Issues:

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

Download a Package:

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

Install a Package at a Specific Version:

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

Upgrade pip Itself:

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