_annotation_is_sequence() — fastapi Function Reference

Architecture documentation for the _annotation_is_sequence() function in shared.py from the fastapi codebase.

Function python FastAPI Routing calls 1 called by 2

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FastAPI→ Routing→ _annotation_is_sequence() — fastapi Function Reference

Dependency Diagram

graph TD
  42e192a3_9947_71f3_357b_4a6d32fd71a1["_annotation_is_sequence()"]
  3e898b29_4dd8_c417_2d9b_a84d867423b4["shared.py"]
  42e192a3_9947_71f3_357b_4a6d32fd71a1 -->|defined in| 3e898b29_4dd8_c417_2d9b_a84d867423b4
  8270df11_9596_bb04_cf3e_ab064ec2d09a["field_annotation_is_sequence()"]
  8270df11_9596_bb04_cf3e_ab064ec2d09a -->|calls| 42e192a3_9947_71f3_357b_4a6d32fd71a1
  dfada564_89da_782d_9604_dfd9bf49f8ea["_annotation_is_complex()"]
  dfada564_89da_782d_9604_dfd9bf49f8ea -->|calls| 42e192a3_9947_71f3_357b_4a6d32fd71a1
  eda91ac5_1bd0_0d8b_6e77_6b82c2f46ce9["lenient_issubclass()"]
  42e192a3_9947_71f3_357b_4a6d32fd71a1 -->|calls| eda91ac5_1bd0_0d8b_6e77_6b82c2f46ce9
  style 42e192a3_9947_71f3_357b_4a6d32fd71a1 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

fastapi/_compat/shared.py lines 60–63

def _annotation_is_sequence(annotation: Union[type[Any], None]) -> bool:
    if lenient_issubclass(annotation, (str, bytes)):
        return False
    return lenient_issubclass(annotation, sequence_types)