Question

I’m trying to do the following in python:

In a file called foo.py:

# simple function that does something: def myFunction(a,b,c):   print 'call to myFunction:',a,b,c  # class used to store some data: class data:   fn = None  # assign function to the class for storage. data.fn = myFunction 

And then in a file called bar.py: import foo

d = foo.data d.fn(1,2,3) 

However, I get the following error:

TypeError: unbound method f() must be called with data instance as first argument (got int instance instead)

This is fair enough I suppose – python is treating d.myFunction as a class method. However, I want it to treat it as a normal function – so I can call it without having to add an unused ‘self’ parameter to the myFunction definition.

So the question is:

How can I store a function in a class object without the function becoming bound to that class?

Answer 1

data.fn = staticmethod(myFunction) 

should do the trick.