Store activations in Docs when save_activations is enabled (explo…

…sion#11002)

* Store activations in Doc when `store_activations` is enabled

This change adds the new `activations` attribute to `Doc`. This
attribute can be used by trainable pipes to store their activations,
probabilities, and guesses for downstream users.

As an example, this change modifies the `tagger` and `senter` pipes to
add an `store_activations` option. When this option is enabled, the
probabilities and guesses are stored in `set_annotations`.

* Change type of `store_activations` to `Union[bool, List[str]]`

When the value is:

- A bool: all activations are stored when set to `True`.
- A List[str]: the activations named in the list are stored

* Formatting fixes in Tagger

* Support store_activations in spancat and morphologizer

* Make Doc.activations type visible to MyPy

* textcat/textcat_multilabel: add store_activations option

* trainable_lemmatizer/entity_linker: add store_activations option

* parser/ner: do not currently support returning activations

* Extend tagger and senter tests

So that they, like the other tests, also check that we get no
activations if no activations were requested.

* Document `Doc.activations` and `store_activations` in the relevant pipes

* Start errors/warnings at higher numbers to avoid merge conflicts

Between the master and v4 branches.

* Add `store_activations` to docstrings.

* Replace store_activations setter by set_store_activations method

Setters that take a different type than what the getter returns are still
problematic for MyPy. Replace the setter by a method, so that type inference
works everywhere.

* Use dict comprehension suggested by @svlandeg

* Revert "Use dict comprehension suggested by @svlandeg"

This reverts commit 6e7b958.

* EntityLinker: add type annotations to _add_activations

* _store_activations: make kwarg-only, remove doc_scores_lens arg

* set_annotations: add type annotations

* Apply suggestions from code review

Co-authored-by: Sofie Van Landeghem <svlandeg@users.noreply.github.com>

* TextCat.predict: return dict

* Make the `TrainablePipe.store_activations` property a bool

This means that we can also bring back `store_activations` setter.

* Remove `TrainablePipe.activations`

We do not need to enumerate the activations anymore since `store_activations` is
`bool`.

* Add type annotations for activations in predict/set_annotations

* Rename `TrainablePipe.store_activations` to `save_activations`

* Error E1400 is not used anymore

This error was used when activations were still `Union[bool, List[str]]`.

* Change wording in API docs after store -> save change

* docs: tag (save_)activations as new in spaCy 4.0

* Fix copied line in morphologizer activations test

* Don't train in any test_save_activations test

* Rename activations

- "probs" -> "probabilities"
- "guesses" -> "label_ids", except in the edit tree lemmatizer, where
  "guesses" -> "tree_ids".

* Remove unused W400 warning.

This warning was used when we still allowed the user to specify
which activations to save.

* Formatting fixes

Co-authored-by: Sofie Van Landeghem <svlandeg@users.noreply.github.com>

* Replace "kb_ids" by a constant

* spancat: replace a cast by an assertion

* Fix EOF spacing

* Fix comments in test_save_activations tests

* Do not set RNG seed in activation saving tests

* Revert "spancat: replace a cast by an assertion"

This reverts commit 0bd5730.

Co-authored-by: Sofie Van Landeghem <svlandeg@users.noreply.github.com>

spacy/pipeline/textcat.py

@@ -1,3 +1,7 @@
+from typing import Iterable, Tuple, Optional, Dict, List, Callable, Any, Union
+from thinc.api import get_array_module, Model, Optimizer, set_dropout_rate, Config
+from thinc.types import Floats2d
+import numpy
 from itertools import islice
 from typing import Any, Callable, Dict, Iterable, List, Optional, Tuple, Union
 

spacy/tokens/doc.pxd

@@ -50,6 +50,8 @@ cdef class Doc:
 
     cdef public dict activations
 
+    cdef public dict activations
+
     cdef public dict user_hooks
     cdef public dict user_token_hooks
     cdef public dict user_span_hooks