CODEWITHSUNDEEP
pythonclassstatic-methods
Dschoni
Dschoni

Reputation: 3862

Calling a static method inside a class in python

I run into a situation, where I call a static method of a class from another static method. To be sure, that I don't ask an X-Y-question, I'm trying to give some background.

I have a class, that holds a data container and several methods to convert data inside the container. As I also want the converters to be callable from the outside without a class instance, I choose static methods:

class SomeClass(object):

  def __init__(self,some_data):
    self.data = some_data

  @staticmethod
  def convert_1(data_item):
    return 1+data_item

  @staticmethod
  def convert_2(data_item):
    return 2*data_item

Now I can do SomeClass.convert_1(data_item) without the need to create an instance of SomeClass.

Let's say, I want to have a method inside SomeClass, that does the two converts successively, and also want to have that method as a static method.

Can I do

@staticmethod
def combined_convert(data_item):
  data_item = SomeClass.convert_1(data_item)
  data_item = SomeClass.convert_2(data_item)
  return data_item

inside SomeClass? This feels wrong, as I call the class inside its own definition, but I cannot come up with another 'more pythonic' way.

Upvotes: 3

Views: 332

Answers (1)

Amarpreet Singh
Amarpreet Singh

Reputation: 2260

You can create a class method.

@classmethod
def combined_convert(cls,data_item):
    data_item = cls.convert_1(data_item)
    data_item = cls.convert_2(data_item)
    return data_item

Upvotes: 1

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