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explain KB change and how to remedy (#12189)

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Sofie Van Landeghem 2023-01-27 15:13:20 +01:00 committed by GitHub
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@ -155,6 +155,21 @@ An error is now raised when unsupported values are given as input to train a
`textcat` or `textcat_multilabel` model - ensure that values are `0.0` or `1.0` `textcat` or `textcat_multilabel` model - ensure that values are `0.0` or `1.0`
as explained in the [docs](/api/textcategorizer#assigned-attributes). as explained in the [docs](/api/textcategorizer#assigned-attributes).
### Using the default knowledge base
As `KnowledgeBase` is now an abstract class, you should call the constructor of
the new `InMemoryLookupKB` instead when you want to use spaCy's default KB
implementation:
```diff
- kb = KnowledgeBase()
+ kb = InMemoryLookupKB()
```
If you've written a custom KB that inherits from `KnowledgeBase`, you'll need to
implement its abstract methods, or alternatively inherit from `InMemoryLookupKB`
instead.
### Updated scorers for tokenization and textcat {id="scores"} ### Updated scorers for tokenization and textcat {id="scores"}
We fixed a bug that inflated the `token_acc` scores in v3.0-v3.4. The reported We fixed a bug that inflated the `token_acc` scores in v3.0-v3.4. The reported