Python 2.7: initializing static variables by calling a staticmethod

Question

I am attempting to initialize some static class variables using static functions defined in the class. Python is throwing an error, indicating that the class name is not defined when I call said static function during initialization. Is there a better way to do this? Thank you.

>>> class Example:
... varA = 5
... @staticmethod
... def func():
... return Example.varA + 1
... varB = func.__func__()
... 
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "<stdin>", line 6, in Example
 File "<stdin>", line 5, in func
NameError: global name 'Example' is not defined

• TimW: I suppose one workaround is to pass varA into func.

Answer 1

You can only access a class after it is defined. Therefore di after the definition:

class Example(object):
 varA = 5
 @staticmethod
 def func():
 return Example.varA + 1
Example.varB = Example.func()

This achieves what you want without any static method:

class Example(object):
 varA = 5
 varB = varA + 1

BTW, in Python 2 you should always inherit form objectin order to get a new style class.