So it won't affect performance. ⚡

### Include an `APIRouter` with a custom `prefix`, `tags`, `responses`, and `dependencies`

Now, let's imagine your organization gave you the `app/internal/admin.py` file.

It contains an `APIRouter` with some admin *path operations* that your organization shares between several projects.

      long unused = simpleBinomial(LongMath.biggestSimpleBinomials[k], k); // mustn't throw
      if (LongMath.biggestSimpleBinomials[k] < Integer.MAX_VALUE) {
        // unless all n are fair game with this k
        try {
          simpleBinomial(LongMath.biggestSimpleBinomials[k] + 1, k);
          fail("Expected ArithmeticException");
        } catch (ArithmeticException expected) {
        }
      }

futsu.nagasaki.jp futtsu.chiba.jp futurehosting.at futuremailing.at fvg.it fyi fylkesbibl.no fyresdal.no førde.no g.bg g.se g.vbrplsbx.io g12.br ga ga.us gaivuotna.no gal gallery gallery.museum gallo gallup galsa.no gamagori.aichi.jp game game-host.org game-server.cc game.tw games games.hu gamo.shiga.jp gamvik.no gangaviika.no gangwon.kr gap garden garden.museum gateway.museum gaular.no gausdal.no gay gb gb.net gbiz gc.ca gd gd.cn gda.pl gdansk.pl gdn gdynia.pl ge ge.it gea geek.nz geekgalaxy.com geelvinck.museum...

  // The CSI external-attacher coordinates with CSI volume driver and updates
  // the volumeattachment status when the attach operation is complete.
  // If the CSIDriverRegistry feature gate is enabled and the value is
  // specified to false, the attach operation will be skipped.
  // Otherwise the attach operation will be called.
  //
  // This field is immutable.
  //
  // +optional

* the data sent by your program to be received by the client through the network
* the contents of a file in the disk to be read by the system and given to your program
* the contents your program gave to the system to be written to disk
* a remote API operation
* a database operation to finish
* a database query to return the results
* etc.

That's what would happen to a third party application that tried to access one of these *path operations* with a token provided by a user, depending on how many permissions the user gave the application.

## About third party integrations

In this example we are using the OAuth2 "password" flow.

This is appropriate when we are logging in to our own application, probably with our own frontend.

    return {"Hello": "World"}


@app.get("/items/{item_id}")
async def read_item(item_id: int, q: Union[str, None] = None):
    return {"item_id": item_id, "q": q}
```

**Nota**:

Se você não sabe, verifique a seção _"In a hurry?"_ sobre <a href="https://fastapi.tiangolo.com/async/#in-a-hurry" target="_blank">`async` e `await` nas docs</a>.

</details>

### Rode

Rode o servidor com:

gal

// gallery : 2013-09-13 Binky Moon, LLC
gallery

// gallo : 2015-06-11 Gallo Vineyards, Inc.
gallo

// gallup : 2015-02-19 Gallup, Inc.
gallup

// game : 2015-05-28 XYZ.COM LLC
game

// games : 2015-05-28 Dog Beach, LLC
games

// gap : 2015-07-31 The Gap, Inc.
gap

// garden : 2014-06-26 Registry Services, LLC
garden

    doTestNoMatches(anyOf("CharMatcher"), "zxqy");
    doTestNoMatches(noneOf("CharMatcher"), "ChMa");
    doTestNoMatches(inRange('p', 'x'), "mom");
    doTestNoMatches(forPredicate(Predicates.equalTo('c')), "abe");
    doTestNoMatches(inRange('A', 'Z').and(inRange('F', 'K').negate()), "F1a");
    doTestNoMatches(CharMatcher.digit(), "\tAz()");
    doTestNoMatches(CharMatcher.javaDigit(), "\tAz()");

    doTestNoMatches(anyOf("CharMatcher"), "zxqy");
    doTestNoMatches(noneOf("CharMatcher"), "ChMa");
    doTestNoMatches(inRange('p', 'x'), "mom");
    doTestNoMatches(forPredicate(Predicates.equalTo('c')), "abe");
    doTestNoMatches(inRange('A', 'Z').and(inRange('F', 'K').negate()), "F1a");
    doTestNoMatches(CharMatcher.digit(), "\tAz()");
    doTestNoMatches(CharMatcher.javaDigit(), "\tAz()");