style: remove Defaults to None (#33404)

libs/core/langchain_core/prompts/chat.py

@@ -135,7 +135,7 @@ class MessagesPlaceholder(BaseMessagePromptTemplate):
 
     n_messages: PositiveInt | None = None
     """Maximum number of messages to include. If `None`, then will include all.
-    Defaults to `None`."""
+    """
 
     def __init__(
         self, variable_name: str, *, optional: bool = False, **kwargs: Any
@@ -241,7 +241,7 @@ class BaseStringMessagePromptTemplate(BaseMessagePromptTemplate, ABC):
                 `"{variable1} {variable2}"`, and `partial_variables` is
                 `{"variable1": "foo"}`, then the final prompt will be
                 `"foo {variable2}"`.
-                Defaults to `None`.
+
             **kwargs: keyword arguments to pass to the constructor.
 
         Returns:
@@ -414,7 +414,7 @@ class _StringImageMessagePromptTemplate(BaseMessagePromptTemplate):
             template_format: format of the template.
                 Options are: 'f-string', 'mustache', 'jinja2'. Defaults to "f-string".
             partial_variables: A dictionary of variables that can be used too partially.
-                Defaults to `None`.
+
             **kwargs: keyword arguments to pass to the constructor.
 
         Returns:

libs/core/langchain_core/prompts/loading.py

@@ -139,7 +139,7 @@ def load_prompt(path: str | Path, encoding: str | None = None) -> BasePromptTemp
 
     Args:
         path: Path to the prompt file.
-        encoding: Encoding of the file. Defaults to `None`.
+        encoding: Encoding of the file.
 
     Returns:
         A PromptTemplate object.

libs/core/langchain_core/prompts/prompt.py

@@ -281,7 +281,7 @@ class PromptTemplate(StringPromptTemplate):
                                fill in the template. For example, if the template is
                               `"{variable1} {variable2}"`, and `partial_variables` is
                               `{"variable1": "foo"}`, then the final prompt will be
-                              `"foo {variable2}"`. Defaults to `None`.
+                              `"foo {variable2}"`.
             **kwargs: Any other arguments to pass to the prompt template.
 
         Returns:

libs/core/langchain_core/prompts/structured.py

@@ -144,7 +144,7 @@ class StructuredPrompt(ChatPromptTemplate):
 
         Args:
             others: The language model to pipe the structured prompt to.
-            name: The name of the pipeline. Defaults to `None`.
+            name: The name of the pipeline.
 
         Returns:
             A RunnableSequence object.