Python Pip and Requirements Files
pip is the package installer for Python. You can use it to install packages from the Python Package Index (PyPI) and other indexes.
Basic Commands
Install a Package
pip install package_nameInstall a Specific Version
pip install package_name==1.0.4Uninstall a Package
pip uninstall package_nameList Installed Packages
pip listShow Package Information
Displays information about a specific package.
pip show package_nameRequirements Files
Requirements files (requirements.txt) are used to specify a list of packages and their versions to be installed. This is crucial for reproducing environments.
Creating a Requirements File
You can save the list of currently installed packages to a file.
pip freeze > requirements.txtInstalling from a Requirements File
To install all packages listed in the file:
pip install -r requirements.txtUpgrading Packages
To upgrade a package to the newest available version:
pip install --upgrade package_nameChecking for Outdated Packages
pip list --outdated