Programmatically turn module/set of functions into a Python class

Question

Suppose I have a file with a bunch methods as bunch_methods.py:

def one(x):
  return int(x)

def two(y)
  return str(y)

Is there a way to take th

Answer 1

You can also solve this problem using the type meta-class. The format for using type to generate a class is as follows:

type(name of the class, 
   tuple of the parent class (for inheritance, can be empty), 
   dictionary containing attributes names and values)

First, we need to rework your functions to take a class as the first attribute.

def one(cls, x):
    return int(x)

def two(cls, y):
    return str(y)

Save this as bunch_method.py, and now we can construct our class as follows.

>>> import bunch_methods as bm
>>> Bunch_Class = type('Bunch_Class', (), bm.__dict__)
>>> bunch_object = Bunch_Class()
>>> bunch_object.__class__

>>> bunch_object.one(1)
1
>>> bunch_object.two(1)
'1'

See the following post for a excellent (and long) guide on meta-classes. What is a metaclass in Python?