langchain-mistralai[patch]: Add ruff bandit rules to linter, formatting (#31803)

- Add ruff bandit rules
- Address a s101 error
- Formatting

libs/partners/mistralai/langchain_mistralai/chat_models.py

@@ -139,7 +139,8 @@ def _convert_mistral_chat_message_to_message(
     _message: dict,
 ) -> BaseMessage:
     role = _message["role"]
-    assert role == "assistant", f"Expected role to be 'assistant', got {role}"
+    if role != "assistant":
+        raise ValueError(f"Expected role to be 'assistant', got {role}")
     content = cast(str, _message["content"])
 
     additional_kwargs: dict = {}
@@ -398,7 +399,8 @@ class ChatMistralAI(BaseChatModel):
     max_tokens: Optional[int] = None
     top_p: float = 1
     """Decode using nucleus sampling: consider the smallest set of tokens whose
-       probability sum is at least top_p. Must be in the closed interval [0.0, 1.0]."""
+    probability sum is at least ``top_p``. Must be in the closed interval
+    ``[0.0, 1.0]``."""
     random_seed: Optional[int] = None
     safe_mode: Optional[bool] = None
     streaming: bool = False

libs/partners/mistralai/langchain_mistralai/embeddings.py

@@ -56,19 +56,21 @@ class MistralAIEmbeddings(BaseModel, Embeddings):
     Key init args — client params:
         api_key: Optional[SecretStr]
             The API key for the MistralAI API. If not provided, it will be read from the
-        environment variable `MISTRAL_API_KEY`.
+            environment variable ``MISTRAL_API_KEY``.
         max_retries: int
             The number of times to retry a request if it fails.
         timeout: int
             The number of seconds to wait for a response before timing out.
         wait_time: int
-        The number of seconds to wait before retrying a request in case of 429 error.
+            The number of seconds to wait before retrying a request in case of 429
+            error.
         max_concurrent_requests: int
             The maximum number of concurrent requests to make to the Mistral API.
 
     See full list of supported init args and their descriptions in the params section.
 
     Instantiate:
+
         .. code-block:: python
 
             from __module_name__ import MistralAIEmbeddings
@@ -80,6 +82,7 @@ class MistralAIEmbeddings(BaseModel, Embeddings):
             )
 
     Embed single text:
+
         .. code-block:: python
 
             input_text = "The meaning of life is 42"
@@ -91,6 +94,7 @@ class MistralAIEmbeddings(BaseModel, Embeddings):
             [-0.024603435769677162, -0.007543657906353474, 0.0039630369283258915]
 
     Embed multiple text:
+
         .. code-block:: python
 
             input_texts = ["Document 1...", "Document 2..."]
@@ -105,6 +109,7 @@ class MistralAIEmbeddings(BaseModel, Embeddings):
             [-0.024603435769677162, -0.007543657906353474, 0.0039630369283258915]
 
     Async:
+
         .. code-block:: python
 
             vector = await embed.aembed_query(input_text)
@@ -188,8 +193,8 @@ class MistralAIEmbeddings(BaseModel, Embeddings):
         return self
 
     def _get_batches(self, texts: list[str]) -> Iterable[list[str]]:
-        """Split a list of texts into batches of less than 16k tokens
+        """Split a list of texts into batches of less than 16k tokens for Mistral
-        for Mistral API."""
+        API."""
         batch: list[str] = []
         batch_tokens = 0
 

libs/partners/mistralai/pyproject.toml

@@ -48,7 +48,7 @@ disallow_untyped_defs = "True"
 target-version = "py39"
 
 [tool.ruff.lint]
-select = ["E", "F", "I", "T201", "UP"]
+select = ["E", "F", "I", "T201", "UP", "S"]
 ignore = [ "UP007", ]
 
 [tool.coverage.run]
@@ -61,3 +61,9 @@ markers = [
     "compile: mark placeholder test used to compile integration tests without running them",
 ]
 asyncio_mode = "auto"
+
+[tool.ruff.lint.extend-per-file-ignores]
+"tests/**/*.py" = [
+    "S101", # Tests need assertions
+    "S311", # Standard pseudo-random generators are not suitable for cryptographic purposes
+]