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Query Parameters in FastAPI

Explore how query parameters work in FastAPI by learning their role in API URL requests and how to define optional and typed query parameters. Understand how to manage error handling with default values to build robust Python APIs.

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Introduction to query parameters

Query parameters are optional parameters, some of which are key-value pairs that appear after the question mark(?) in the URL.

Note that the question mark sign is used to separate path and query parameters.

In FastAPI, other function parameters that are not declared as part of the path parameters are ...