Python Class Setup For Serialization Without Pickle

Scenario I am looking for an object oriented approach in python that makes it possible to save an instance of a class in a data file and also load it again in at a later point in t

Solution 1:

I think this is a case for the @classmethod decorator. For example, if you change the Load method to the following:

    @classmethoddefLoad(cls, Filename):
        # Do stuffreturn cls(ComplexA, ComplexB)

Then you could override the constructor:

classB(A):def__init__(self, complexA, complexB):
        # Whatever you want, including calling the parent constructor

And, finally, you could call B.Load(some_file) which would invoke B.__init__.

Solution 2:

Overloading in not needed, just use a classmethod for alternative contructor methods. Look at this questions and it's answers.

classA(object):

    @classmethod
    def Load(cls, Filename):
        #read ComplexParam1 and ComplexParam2 and call constructorreturn cls(ComplexParam1, ComplexParam2)

By using the cls parameter for the class, it works nice with inheritance.