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test_count_tokens_approximately_text_only_backward_compatible() — langchain Function Reference

Architecture documentation for the test_count_tokens_approximately_text_only_backward_compatible() function in test_utils.py from the langchain codebase.

Function python CoreAbstractions MessageSchema

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Dependency Diagram

graph TD
  64296862_d983_a9b4_e4da_1a350243cddf["test_count_tokens_approximately_text_only_backward_compatible()"]
  ea3f8d89_f44b_6738_3cb9_a740a73cfca4["test_utils.py"]
  64296862_d983_a9b4_e4da_1a350243cddf -->|defined in| ea3f8d89_f44b_6738_3cb9_a740a73cfca4
  style 64296862_d983_a9b4_e4da_1a350243cddf fill:#6366f1,stroke:#818cf8,color:#fff

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Source Code

libs/core/tests/unit_tests/messages/test_utils.py lines 2799–2810

def test_count_tokens_approximately_text_only_backward_compatible() -> None:
    """Test that text-only messages still work correctly."""
    messages = [
        HumanMessage(content="Hello world"),
        AIMessage(content="Hi there!"),
    ]

    token_count = count_tokens_approximately(messages)

    # Should be ~15 tokens
    # (11 chars + 9 chars + roles + 2*3 extra)
    assert 13 <= token_count <= 17

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Frequently Asked Questions

What does test_count_tokens_approximately_text_only_backward_compatible() do?
test_count_tokens_approximately_text_only_backward_compatible() is a function in the langchain codebase, defined in libs/core/tests/unit_tests/messages/test_utils.py.
Where is test_count_tokens_approximately_text_only_backward_compatible() defined?
test_count_tokens_approximately_text_only_backward_compatible() is defined in libs/core/tests/unit_tests/messages/test_utils.py at line 2799.

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