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__call__() — fastapi Function Reference

Architecture documentation for the __call__() function in asyncexitstack.py from the fastapi codebase.

Function python Middleware Protocols

Entity Profile

Dependency Diagram

graph TD
  5950af0b_8c0e_27ff_e270_ff798126a896["__call__()"]
  a4e9210e_542f_dbd2_500a_37b56326c1e7["AsyncExitStackMiddleware"]
  5950af0b_8c0e_27ff_e270_ff798126a896 -->|defined in| a4e9210e_542f_dbd2_500a_37b56326c1e7
  style 5950af0b_8c0e_27ff_e270_ff798126a896 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

fastapi/middleware/asyncexitstack.py lines 15–18

    async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
        async with AsyncExitStack() as stack:
            scope[self.context_name] = stack
            await self.app(scope, receive, send)

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Frequently Asked Questions

What does __call__() do?
__call__() is a function in the fastapi codebase, defined in fastapi/middleware/asyncexitstack.py.
Where is __call__() defined?
__call__() is defined in fastapi/middleware/asyncexitstack.py at line 15.

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