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docs/en/docs/advanced/events.md

Let's start with an example **use case** and then see how to solve it with this.

Let's imagine that you have some **machine learning models** that you want to use to handle requests. 🤖

The same models are shared among requests, so, it's not one model per request, or one per user or something similar.

Let's imagine that loading the model can **take quite some time**, because it has to read a lot of **data from disk**. So you don't want to do it for every request.

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github.com/tiangolo/fastapi

tests/test_starlette_exception.py

@app.get("/items/{item_id}")
async def read_item(item_id: str):
    if item_id not in items:
        raise HTTPException(
            status_code=404,
            detail="Item not found",
            headers={"X-Error": "Some custom header"},
        )
    return {"item": items[item_id]}


@app.get("/http-no-body-statuscode-exception")
async def no_body_status_code_exception():
    raise HTTPException(status_code=204)

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github.com/tiangolo/fastapi

docs/en/docs/advanced/path-operation-advanced-configuration.md

And then in our code, we parse that YAML content directly, and then we are again using the same Pydantic model to validate the YAML content:

{* ../../docs_src/path_operation_advanced_configuration/tutorial007_py39.py hl[24:31] *}

/// tip

Here we reuse the same Pydantic model.

But the same way, we could have validated it in some other way.

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github.com/tiangolo/fastapi

docs/en/docs/tutorial/middleware.md

* It can then do something to that **request** or run any needed code.
* Then it passes the **request** to be processed by the rest of the application (by some *path operation*).
* It then takes the **response** generated by the application (by some *path operation*).
* It can do something to that **response** or run any needed code.
* Then it returns the **response**.

/// note | Technical Details

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github.com/tiangolo/fastapi

docs_src/custom_response/tutorial004_py39.py

from fastapi import FastAPI
from fastapi.responses import HTMLResponse

app = FastAPI()


def generate_html_response():
    html_content = """
    <html>
        <head>
            <title>Some HTML in here</title>
        </head>
        <body>
            <h1>Look ma! HTML!</h1>
        </body>
    </html>
    """
    return HTMLResponse(content=html_content, status_code=200)

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github.com/apache/maven

compat/maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/PluginsMetadataGenerator.java

         * processes one artifact at a time and hence cannot associate the artifacts from the same project to use the
         * same version index. Allowing the caller to pass in metadata from a previous deployment allows to re-establish
         * the association between the artifacts of the same project.
         */
        for (Iterator<? extends Metadata> it = metadatas.iterator(); it.hasNext(); ) {

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github.com/apache/maven

impl/maven-cli/src/test/java/org/apache/maven/cling/invoker/mvnup/PluginUpgradeCliTest.java

        assertTrue(options.directory().isPresent(), "--directory option should be present");
        assertEquals("/some/path", options.directory().get(), "--directory should be /some/path");
    }

    @Test
    void testGoalsParsing() throws ParseException {
        String[] args = {"apply", "--plugins"};
        CommonsCliUpgradeOptions options = CommonsCliUpgradeOptions.parse(args);

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github.com/apache/maven

api/maven-api-core/src/main/java/org/apache/maven/api/services/BuilderProblem.java

     * is given by {@link #getSource()}.
     *
     * @return the one-based index of the line containing the problem or a non-positive value if unknown
     */
    int getLineNumber();

    /**
     * Gets the one-based index of the column containing the problem. The column number should refer to some text file
     * that is given by {@link #getSource()}.
     *

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github.com/apache/maven

compat/maven-compat/src/main/java/org/apache/maven/usability/plugin/ExpressionDocumenter.java

     * <syntax>project.distributionManagementArtifactRepository</syntax>
     * <origin><![CDATA[
     * <distributionManagement>
     * <repository>
     * <id>some-repo</id>
     * <url>scp://host/path</url>
     * </repository>
     * <snapshotRepository>
     * <id>some-snap-repo</id>
     * <url>scp://host/snapshot-path</url>
     * </snapshotRepository>
     * </distributionManagement>
     * ]]></origin>
     * <usage><![CDATA[

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github.com/tiangolo/fastapi

tests/test_tutorial/test_background_tasks/test_tutorial001.py

    assert response.status_code == 200, response.text
    assert response.json() == {"message": "Notification sent in the background"}
    with open("./log.txt") as f:

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