langchain Architecture Docs
Home / Function/ __len__() — langchain Function Reference

__len__() — langchain Function Reference

Architecture documentation for the __len__() function in chat.py from the langchain codebase.

Function python PromptManagement ChatTemplates

Entity Profile

Dependency Diagram

graph TD
  00bd33af_6bab_c11c_e829_ac9dec03c3d5["__len__()"]
  6be4a9a5_5fe4_e64f_c374_e63767576bf6["ChatPromptTemplate"]
  00bd33af_6bab_c11c_e829_ac9dec03c3d5 -->|defined in| 6be4a9a5_5fe4_e64f_c374_e63767576bf6
  style 00bd33af_6bab_c11c_e829_ac9dec03c3d5 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/langchain_core/prompts/chat.py lines 1299–1301

    def __len__(self) -> int:
        """Return the length of the chat template."""
        return len(self.messages)

Domain

Subdomains

Defined In

Source

Frequently Asked Questions

What does __len__() do?
__len__() is a function in the langchain codebase, defined in libs/core/langchain_core/prompts/chat.py.
Where is __len__() defined?
__len__() is defined in libs/core/langchain_core/prompts/chat.py at line 1299.

Analyze Your Own Codebase

Get architecture documentation, dependency graphs, and domain analysis for your codebase in minutes.

Try Supermodel Free