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Asked: 2026-06-15T22:31:14+00:00

I have the following problem: self.myWrapper = wrapper.Wrapper self.myWrapper.set_entities(self.myWrapper, self.testEntity) produces an error message,

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I have the following problem:

    self.myWrapper = wrapper.Wrapper
    self.myWrapper.set_entities(self.myWrapper, self.testEntity)

produces an error message, so does

 self.myWrapper = wrapper.Wrapper   
 self.myWrapper.set_entities(self.myWrapper, self.testEntity)

The error message is:

TypeError: unbound method set_entities() must be called with Wrapper
instance as first argument (got type instance instance instead)

What is wrong here? Where is the difference ob an object instance and a type instance?

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1 Answer

  1. Editorial Team

    Assuming wrapper.Wrapper is a class, you need to actually initialize an instance.

    self.myWrapper = wrapper.Wrapper()

    Note the parenthesis. Also, note this isn’t a problem of getter/setter calling (though you should read up a bit more on Python if you are using the getter/setter pattern for member attributes, as it’s not recommended in most cases in Python), but rather a problem of instance vs class and attribute access.

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