Improved typing

Author: ankane

pgvector/sparsevec.py

@@ -64,9 +64,7 @@ def indices(self) -> list[int]:
     def values(self) -> list[float]:
         return self._values
 
-    def to_coo(self) -> Any:
-        from scipy.sparse import coo_array
-
+    def to_coo(self) -> coo_array:
         coords = ([0] * len(self._indices), self._indices)
         return coo_array((self._values, coords), shape=(1, self._dim))