post_init() — langchain Function Reference

Architecture documentation for the post_init() function in length_based.py from the langchain codebase.

Function python PromptManagement ExampleSelection

Entity Profile

PromptManagement→ ExampleSelection→ post_init() — langchain Function Reference

Dependency Diagram

graph TD
  247d47d5_dd69_b76f_2f94_3dadf251744e["post_init()"]
  0eacfd0f_9944_7bad_618f_81f1c3dafb2a["LengthBasedExampleSelector"]
  247d47d5_dd69_b76f_2f94_3dadf251744e -->|defined in| 0eacfd0f_9944_7bad_618f_81f1c3dafb2a
  style 247d47d5_dd69_b76f_2f94_3dadf251744e fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/example_selectors/length_based.py lines 87–93

    def post_init(self) -> Self:
        """Validate that the examples are formatted correctly."""
        if self.example_text_lengths:
            return self
        string_examples = [self.example_prompt.format(**eg) for eg in self.examples]
        self.example_text_lengths = [self.get_text_length(eg) for eg in string_examples]
        return self