Python Chainable Class Methods

I want to do the following: pattern = cl().a().b('test').c() where cl is a class and a, b, c are class methods. After that I need to call pattern.to_string and it should output a

Solution 1:

Return the class instance at the end of each method and store the intermediate results in a class variable:

classMyClass:
    result = None

    defa(self):
        # do things and store in self.resultself.result = ...
        returnselfdefb(self, value):
        # do things and store in self.resultself.result = ...
        returnself

This allows you to chain the methods as desired: cl().a().b("test").c().

You can then obtain the result by looking at the value of instance.result.