[vertexai]: Use one gcs client in Imageutils (#609)

libs/vertexai/langchain_google_vertexai/_anthropic_utils.py

@@ -31,7 +31,7 @@
 from pydantic import BaseModel
 
 if TYPE_CHECKING:
-    from anthropic.types import RawMessageStreamEvent  # type: ignore
+    from anthropic.types import RawMessageStreamEvent
 
 _message_type_lookups = {
     "human": "user",

libs/vertexai/langchain_google_vertexai/_image_utils.py

@@ -4,6 +4,7 @@
 import os
 import re
 from enum import Enum
+from functools import cached_property
 from typing import Dict, Optional, Union
 from urllib.parse import urlparse
 
@@ -43,6 +44,10 @@ def __init__(
         """
         self._project = project
 
+    @cached_property
+    def _storage_client(self):
+        return storage.Client(project=self._project)
+
     def load_bytes(self, image_string: str) -> bytes:
         """Routes to the correct loader based on the image_string.
 
@@ -198,7 +203,7 @@ def _blob_from_gcs(self, gcs_uri: str) -> storage.Blob:
             storage.Blob
         """
 
-        gcs_client = storage.Client(project=self._project)
+        gcs_client = self._storage_client
         blob = storage.Blob.from_string(gcs_uri, gcs_client)
         blob.reload(client=gcs_client)
         return blob

libs/vertexai/langchain_google_vertexai/model_garden.py

@@ -148,7 +148,7 @@ def __init__(self, **kwargs: Any) -> None:
 
     @model_validator(mode="after")
     def validate_environment(self) -> Self:
-        from anthropic import (  # type: ignore
+        from anthropic import (
             AnthropicVertex,
             AsyncAnthropicVertex,
         )