Functional Programming

Practical Function Specialization in Python with functools.partial

Functions often expose more parameters than a particular caller needs to choose. A parser may always use the same base, a callback may need access to one application object, or a formatting function may use a fixed prefix throughout one subsystem. Python’s functools.partial() can turn such a general callable into a more focused callable by binding some arguments in advance. The result remains callable, so it can be passed to APIs that expect a function-like object without introducing a wrapper function solely to carry configuration.