The pip interface

fyn provides a fast, pip-compatible interface for common pip, pip-tools, and virtualenv commands. These commands work directly with the virtual environment, in contrast to fyn's primary interfaces where the virtual environment is managed automatically. The fyn pip interface exposes the speed and functionality of fyn to power users and projects that are not ready to transition away from pip and pip-tools.

The following sections discuss the basics of using fyn pip:

• Creating and using environments
• Installing and managing packages
• Inspecting environments and packages
• Declaring package dependencies
• Locking and syncing environments

Please note these commands do not exactly implement the interfaces and behavior of the tools they are based on. The further you stray from common workflows, the more likely you are to encounter differences. Consult the pip-compatibility guide for details.

Important

fyn does not rely on or invoke pip. The pip interface is named as such to highlight its dedicated purpose of providing low-level commands that match pip's interface and to separate it from the rest of fyn's commands which operate at a higher level of abstraction.