funvert

Function Inverter

Methods are just functions, therefore we should be able to call functions as though they were methods.

This is accomplished by:

• The Funverted class, which wraps the original object and overloads __getattr__() to look for functions
• The funvert() function, which is the recommended way to wrap and prevents double-wrapping
• the ._obj property, which gives the unwrapped object if needed.

Example:

from funvert import funvert as fv

def incd(x, by=1):
    return x + by

print('7 ==', fv(1).incd().incd(2).incd(by=3))
#=>  7 == 7

# You can use a funverted object in arithmetic expressions:
print('8 ==', fv(1).incd().incd(2).incd(by=3) + 1)
#==> 8 == 8

# use ._obj to get the plain type object
print('8 ==', fv(1).incd().incd(2).incd(by=3),_obj + 1)
#=> 8 == 8

A funverted object still has its own methods available:

class Dog:
    def bark(self):
        print('Woof!')

d = fv(Dog())
d.bark()
#=> Woof!

Ideally you can use a funverted object anywhere you'd use the object it wraps, however this may not be true in some cases. Basic arithmetic operators are implemented. Other operators or "dunder methods" will be implemented as needed or as requested.

One day all classes will inherit from Funverted and bound methods will be a thing of the past!

That day is not today. Inheriting from Funverted is not currently supported, and calling a function in this way often creates a new Funverted object, which may impose a performance penalty.