Python Utilities I wrote

This repository contains a few python utilities I think may be useful to some people, but really they're mostly funny coding exercises I posed myself. They do things like make a callable strict (that is, only allow it to accept and return the types given in its annotations, if those exist) (see utils.decorators.strict)

modules

Currently I have some decorators, some things to do with types, and a cache module

decorators

• overload allows you to specify different implementations of a function based on the types given to it
• strict allows you to make a function strict, as described above
• template allows you to make a "class template", as seen in C++ (except of course, everything in python happens at runtime, including type creation)
• convert allows you to convert any or all arguments to a function using converter function annotations
• factory lets you specify factory functions for function parameters
• auto_slots creates a __slots__ class attribute from assignments in the class' __init__ method
• contracts lets you check functions' contracts at runtime, erroring if they are not obeyed (both preconditions and postconditions can be checked)
• evaluated immediately evaluates the decorated function with given arguments

types

• NaturalNumber and StrictNaturalNumber
• my own isinstance function that lets you check Union types as well

cache

• a cache decorator that lets you specify a cache policy at function call time