Add equality definition for vectors (#11806)

* Add equality definition for vectors

This re-uses the check from sourcing components.

* Use the equality check

* Format

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

spacy/language.py

@@ -706,13 +706,7 @@ class Language:
         # Check source type
         if not isinstance(source, Language):
             raise ValueError(Errors.E945.format(name=source_name, source=type(source)))
-        # Check vectors, with faster checks first
+        if self.vocab.vectors != source.vocab.vectors:
-        if (
-            self.vocab.vectors.shape != source.vocab.vectors.shape
-            or self.vocab.vectors.key2row != source.vocab.vectors.key2row
-            or self.vocab.vectors.to_bytes(exclude=["strings"])
-            != source.vocab.vectors.to_bytes(exclude=["strings"])
-        ):
             warnings.warn(Warnings.W113.format(name=source_name))
         if source_name not in source.component_names:
             raise KeyError(

spacy/tests/vocab_vectors/test_vectors.py

@@ -626,3 +626,23 @@ def test_floret_vectors(floret_vectors_vec_str, floret_vectors_hashvec_str):
             OPS.to_numpy(vocab_r[word].vector),
             decimal=6,
         )
+
+
+def test_equality():
+    vectors1 = Vectors(shape=(10, 10))
+    vectors2 = Vectors(shape=(10, 8))
+
+    assert vectors1 != vectors2
+
+    vectors2 = Vectors(shape=(10, 10))
+    assert vectors1 == vectors2
+
+    vectors1.add("hello", row=2)
+    assert vectors1 != vectors2
+
+    vectors2.add("hello", row=2)
+    assert vectors1 == vectors2
+
+    vectors1.resize((5, 9))
+    vectors2.resize((5, 9))
+    assert vectors1 == vectors2

spacy/vectors.pyx

@@ -243,6 +243,15 @@ cdef class Vectors:
         else:
             return key in self.key2row
 
+    def __eq__(self, other):
+        # Check for equality, with faster checks first
+        return (
+                self.shape == other.shape
+                and self.key2row == other.key2row
+                and self.to_bytes(exclude=["strings"])
+                  == other.to_bytes(exclude=["strings"])
+               )
+
     def resize(self, shape, inplace=False):
         """Resize the underlying vectors array. If inplace=True, the memory
         is reallocated. This may cause other references to the data to become