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

What argument do you want to pass to para? self.function1(<that argument goes here>) — Mathias R. Jessen
– Mathias R. Jessen, Commented Sep 26, 2022 at 10:59

Angelo van Meurs · Accepted Answer · 2022-09-26 11:26:06Z

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)

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