utils#
Utility functions for LangChain.
These functions do not depend on any other LangChain module.
Classes
Dummy lock that provides the proper interface but no protection. |
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Create |
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Async context manager for safely finalizing an asynchronously cleaned-up resource such as an async generator, calling its |
alias of |
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Formatter that checks for extra keys. |
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Representation of a callable function to send to an LLM. |
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Representation of a callable function to the OpenAI API. |
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Dummy lock that provides the proper interface but no protection. |
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Create |
alias of |
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Custom exception for Chevron errors. |
Functions
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Utility batching function for async iterables. |
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Pure-Python implementation of anext() for testing purposes. |
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An individual iterator of a |
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Check if an environment variable is set. |
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Get a value from a dictionary or an environment variable. |
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Get a value from a dictionary or an environment variable. |
Convert a raw function/class to an OpenAI function. :param function: A dictionary, Pydantic BaseModel class, TypedDict class, a LangChain Tool object, or a Python function. If a dictionary is passed in, it is assumed to already be a valid OpenAI function, a JSON schema with top-level 'title' key specified, an Anthropic format tool, or an Amazon Bedrock Converse format tool. :param strict: If True, model output is guaranteed to exactly match the JSON Schema provided in the function definition. If None, |
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Convert a tool-like object to an OpenAI tool schema. |
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Convert an example into a list of messages that can be fed into an LLM. |
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Extract all links from a raw HTML string and convert into absolute paths. |
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Extract all links from a raw HTML string. |
Get bolded text. |
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Get mapping for items to a support color. |
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Get colored text. |
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Print text with highlighting and no end characters. |
Determine if running within IPython or Jupyter. |
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Utility batching function. |
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An individual iterator of a |
Parse a JSON string from a Markdown string and check that it contains the expected keys. |
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Parse a JSON string from a Markdown string. |
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Parse a JSON string that may be missing closing braces. |
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Try to substitute $refs in JSON Schema. |
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Parse a literal from the template. |
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Do a preliminary check to see if a tag could be a standalone. |
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Parse a tag from a template. |
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Do a final check to see if a tag could be a standalone. |
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Render a mustache template. |
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Tokenize a mustache template. |
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Create a pydantic model with the given field definitions. |
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Create a pydantic model with the given field definitions. |
Get the field names of a Pydantic model. |
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Get the major version of Pydantic. |
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Check if the given class is an instance of Pydantic BaseModel. |
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Check if the given class is a subclass of Pydantic BaseModel. |
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Check if the installed Pydantic version is 1.x-like. |
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Check if the installed Pydantic version is 1.x-like. |
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Decorator to run a function before model initialization. |
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Convert a list to a comma-separated string. |
Stringify a dictionary. |
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Stringify a value. |
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Build extra kwargs from values and extra_kwargs. |
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Check the version of a package. |
Convert a string to a SecretStr if needed. |
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Create a factory method that gets a value from an environment variable. |
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Get field names, including aliases, for a pydantic class. |
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Dynamically import a module and raise an exception if the module is not installed. |
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Context manager for mocking out datetime.now() in unit tests. |
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Raise an error with the response text. |
Secret from env. |
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Validate specified keyword args are mutually exclusive." |
Deprecated functions