Compare yarl vs. zope.interface

All components of a URL, including scheme, user, password, host, port, path, query, and fragment, can be accessed through their respective properties. Every manipulation of a URL results in a newly generated URL object, and the strings provided to the constructor or modification functions are automatically encoded to yield a canonical format. While standard properties return percent-decoded values, the raw_ variants should be used to obtain encoded strings. A human-readable version of the URL can be accessed using the .human_repr() method. Binary wheels for yarl are available on PyPI for operating systems such as Linux, Windows, and MacOS. In cases where you wish to install yarl on different systems like Alpine Linux—which does not comply with manylinux standards due to the absence of glibc—you will need to compile the library from the source using the provided tarball. This process necessitates having a C compiler and the necessary Python headers installed on your machine. It is important to remember that the uncompiled, pure-Python version is significantly slower. Nevertheless, PyPy consistently employs a pure-Python implementation, thus remaining unaffected by performance variations. Additionally, this means that regardless of the environment, PyPy users can expect consistent behavior from the library.

This package is designed for independent reuse across any Python project and is maintained by the Zope Toolkit initiative. It serves as an implementation of "object interfaces" within the Python ecosystem. Interfaces act as a way to designate objects as adhering to a specific API or contract, making this package a practical example of applying the Design By Contract methodology in Python. Essentially, interfaces are objects that detail (document) the expected external behavior of the objects that implement them. An interface articulates behavior through a combination of informal documentation within a docstring, attribute definitions, and invariants, which are the necessary conditions that must be satisfied by the objects implementing the interface. Attribute definitions specify particular attributes, outlining their names while offering documentation and constraints regarding the allowed values for those attributes. These definitions can take various forms, allowing for flexibility in how they are expressed. Furthermore, the ability to define interfaces enhances the clarity and reliability of code by ensuring that objects conform to specified behaviors.