fix: InitializableComponent type hints (#12692)

* fix: InitializableComponent type hints

* fix: avoid circular dependency

* style: clean imports in language.py

* style: use relative imports

Co-authored-by: Adriane Boyd <adrianeboyd@gmail.com>

* fix: apply black

---------

Co-authored-by: Adriane Boyd <adrianeboyd@gmail.com>

spacy/language.py

@@ -1,6 +1,6 @@
 from typing import Iterator, Optional, Any, Dict, Callable, Iterable
 from typing import Union, Tuple, List, Set, Pattern, Sequence
-from typing import NoReturn, TYPE_CHECKING, TypeVar, cast, overload
+from typing import NoReturn, TypeVar, cast, overload
 
 from dataclasses import dataclass
 import random
@@ -1269,7 +1269,10 @@ class Language:
                 "No 'get_examples' callback provided to 'Language.initialize', creating dummy examples"
             )
             doc = Doc(self.vocab, words=["x", "y", "z"])
-            get_examples = lambda: [Example.from_dict(doc, {})]
+
+            def get_examples():
+                return [Example.from_dict(doc, {})]
+
         if not hasattr(get_examples, "__call__"):
             err = Errors.E930.format(
                 method="Language.initialize", obj=type(get_examples)

spacy/ty.py

@@ -1,11 +1,13 @@
 from typing import TYPE_CHECKING
 from typing import Optional, Any, Iterable, Dict, Callable, Sequence, List
+
 from .compat import Protocol, runtime_checkable
 
 from thinc.api import Optimizer, Model
 
 if TYPE_CHECKING:
     from .training import Example
+    from .language import Language
 
 
 @runtime_checkable
@@ -32,7 +34,7 @@ class InitializableComponent(Protocol):
     def initialize(
         self,
         get_examples: Callable[[], Iterable["Example"]],
-        nlp: Iterable["Example"],
+        nlp: "Language",
         **kwargs: Any
     ):
         ...