How to call a function from another function in a class in Python

Question

In the example below, How do I call function 1 in function 2 . I have tried it just like in the example, but does not recognise para in function 2 and I have also tried replacing it with self.para which gets a undefined error..what is the right way to call function 1 ? I can't add another argument in function2(self) .

class Example:
    #def...

    def function1(self, para):
        #bla bla
    
    def function2(self):
        xxx = self.function1(para)
        # how do I call a function such as this

Answer 1

class Example:
    #def...

    def function1(self, para):
        #bla bla
    
    def function2(self):

        para = 12  # make sure the variable you pass to function1 is defined        

        xxx = self.function1(para)
        # how do I call a function such as this

You can only reference self.para if class Example has been instantiated and has an attribute called para .

If class Example has attributes that are static, you can reference those through an instance (self) or through the class.

Instantiating and referencing self:

class Example:
    def __init__(self):  # constructor method
        self.value = 12  # instance attribute

    def func1(self, parameter):
        # do stuff
        return ...

    def func2(self):
        x = func1(self.value)

or from static context:

class Example:

    value = 12  # class attribute

    def func1(self, parameter):
        # do stuff
        return ...

    def func2(self):
        x = func1(Example.value)