fix(utils): embed(texts=[]) crashes with IndexError on empty input (#778)

* fix(utils): raise clear error on empty embed response list

* chore: bump version 7.0.3 -> 7.0.4

---------

Co-authored-by: Ishaan Samantray <ishaansamantray@Ishaans-MacBook-Pro.local>
Co-authored-by: jsklan <jsklan.development@gmail.com>

Author: 3 people

.fern/metadata.json

@@ -97,7 +97,7 @@
   "originGitCommit": "cc4f564d58fa6fbe43292b5ea6bca57aac51946b",
   "originGitCommitIsDirty": true,
   "invokedBy": "ci",
-  "requestedVersion": "7.0.3",
+  "requestedVersion": "7.0.4",
   "ciProvider": "github",
-  "sdkVersion": "7.0.3"
+  "sdkVersion": "7.0.4"
 }

pyproject.toml

@@ -4,7 +4,7 @@ dynamic = ["version"]
 
 [tool.poetry]
 name = "cohere"
-version = "7.0.3"
+version = "7.0.4"
 description = ""
 readme = "README.md"
 authors = []

src/cohere/core/client_wrapper.py

@@ -31,12 +31,12 @@ def get_headers(self) -> typing.Dict[str, str]:
         import platform
 
         headers: typing.Dict[str, str] = {
-            "User-Agent": "cohere/7.0.3",
+            "User-Agent": "cohere/7.0.4",
             "X-Fern-Language": "Python",
             "X-Fern-Runtime": f"python/{platform.python_version()}",
             "X-Fern-Platform": f"{platform.system().lower()}/{platform.release()}",
             "X-Fern-SDK-Name": "cohere",
-            "X-Fern-SDK-Version": "7.0.3",
+            "X-Fern-SDK-Version": "7.0.4",
             **(self.get_custom_headers() or {}),
         }
         if self._client_name is not None:

src/cohere/utils.py

@@ -188,6 +188,9 @@ def merge_meta_field(metas: typing.List[ApiMeta]) -> ApiMeta:
 
 
 def merge_embed_responses(responses: typing.List[EmbedResponse]) -> EmbedResponse:
+    if not responses:
+        raise ValueError("Cannot merge embed responses: no texts were provided to embed")
+
     meta = merge_meta_field([response.meta for response in responses if response.meta])
     response_id = ", ".join(response.id for response in responses)
     texts = [

tests/test_embed_utils.py

@@ -189,6 +189,12 @@ def test_merge_embeddings_floats(self) -> None:
             )
         ))
 
+    def test_merge_embed_responses_empty_list_raises_value_error(self) -> None:
+        # An empty texts list (e.g. Client.embed(texts=[])) yields no responses;
+        # merge_embed_responses must raise a clear ValueError instead of IndexError.
+        with self.assertRaises(ValueError):
+            merge_embed_responses([])
+
     def test_merge_embeddings_by_type_with_none_field_in_later_response(self) -> None:
         resp1 = EmbeddingsByTypeEmbedResponse(
             response_type="embeddings_by_type", id="1",