pinstance 0.1.0

Simple singleton class and function decorators with 0 overhead

Pinstance

Simple singleton class decorator with ability to call bounded methods with 0 overhead.

Decorated class can inherit other classes and can be inherited.

Decorated class can not be collected till the end of a programm

Usage

Decorate a class:

@instanceclass
class MyClass:
    def __init__(self, val):
        self.class_var = val

Now you can instanciate it

inst = MyClass(777)
inst.class_var  ## 777

and access the instance anywhere via get_instance() class method:

MyClass.get_instance().class_var  ## 777
MyClass.get_instance().some_var = 555
MyClass.get_instance().class_var  ## 555

Furthermore, to simplify calling methods via instance reference one can decorate desiered @instanceclass methods:

@instancemethod
def my_function(self, param):
    print(f'{self.class_var} | {param}')

and call them like static methods with 0 overhead:

MyClass.my_function('example')  ## 555 | example