CODEWITHSUNDEEP
pythondjangoproperties
ostergaard
ostergaard

Reputation: 3507

Python "property object has no attribute" Exception

confirmation = property(_get_confirmation, _set_confirmation)
confirmation.short_description = "Confirmation"

When I try the above I get an Exception I don't quite understand:

AttributeError: 'property' object has no attribute 'short_description'

This was an answer to another question on here but I couldn't comment on it as I don't have enough points or something. :-(

In other tests I've also got this error under similar circumstances:

TypeError: 'property' object has only read-only attributes (assign to .short_description)

Any ideas anybody?

Upvotes: 5

Views: 8368

Answers (1)

Aaron Digulla
Aaron Digulla

Reputation: 328614

The result of property() is an object where you can't add new fields or methods. It's immutable which is why you get the error.

One way to achieve what you want is with using four arguments to property():

confirmation  = property(_get_confirmation, _set_confirmation, None, "Confirmation.")

or put the explanation into the docstring of _get_confirmation.

(see docs here, also supported in Python 2)

[EDIT] As for the answer, you refer to: I think the indentation of the example was completely wrong when you looked at it. This has been fixed, now.

Upvotes: 2

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