//// tab | `pip`

<div class="termy">

```console
$ pip install -r requirements.txt

---> 100%
```

</div>

////

//// tab | `uv`

If you have <a href="https://github.com/astral-sh/uv" class="external-link" target="_blank">`uv`</a>:

<div class="termy">

```console
$ uv pip install -r requirements.txt

---> 100%
```

</div>

////

* Memory
* Previous steps before starting

Up to this point, with all the tutorials in the docs, you have probably been running a **server program**, for example, using the `fastapi` command, that runs Uvicorn, running a **single process**.

When deploying applications you will probably want to have some **replication of processes** to take advantage of **multiple cores** and to be able to handle more requests.

```Python
if "stanleyjobsox" == "stanleyjobson" and "love123" == "swordfish":
    ...
```

Python will have to compare the whole `stanleyjobso` in both `stanleyjobsox` and `stanleyjobson` before realizing that both strings are not the same. So it will take some extra microseconds to reply back "Incorrect username or password".

#### The time to answer helps the attackers { #the-time-to-answer-helps-the-attackers }

We have a lifecycle mapping for the packaging of *jar* below. You see that for this packaging we have a *default* lifecycle and a list of phases where each phase is a comma separated list of goals to run and they are in the form groupId:artifactId:version.

<configuration>
  <lifecycles>
    <lifecycle>
      <id>default</id>
      <phases>
        <process-resources>org.apache.maven.plugins:maven-resources-plugin:resources</process-resources>

			if searchRE == nil || searchRE.MatchString(stackTrace) {
				ret[t] = append(ret[t], stackTrace)
			}
		case record:
			save(line)
		default:
			z := goroutinesRE.FindStringSubmatch(line)
			if len(z) == 3 {
				if z[2] != "" {
					a, _ := strconv.Atoi(z[2])
					t = time.Duration(a) * time.Minute
					save(line)
					record = true
				} else {
					skip = true
				}
			}
		}
	}

	return ret, nil
}

in a future release! If you’re skipping releases, it’ll be much easier if you upgrade to OkHttp 4.0
as an intermediate step.

#### Vars and Vals

Java doesn’t have language support for properties so developers make do with getters and setters.
Kotlin does have properties and we take advantage of them in OkHttp.

 * **Address**: certificatePinner, connectionSpecs, dns, hostnameVerifier, protocols, proxy,

```

## Disable Convert Underscores { #disable-convert-underscores }

The same way as with regular header parameters, when you have underscore characters in the parameter names, they are **automatically converted to hyphens**.

For example, if you have a header parameter `save_data` in the code, the expected HTTP header will be `save-data`, and it will show up like that in the docs.

<blockquote markdown="1">

**FastAPI** wouldn't exist if not for the previous work of others.

There have been many tools created before that have helped inspire its creation.

I have been avoiding the creation of a new framework for several years. First I tried to solve all the features covered by **FastAPI** using many different frameworks, plug-ins, and tools.

# Sub Applications - Mounts { #sub-applications-mounts }

If you need to have two independent FastAPI applications, with their own independent OpenAPI and their own docs UIs, you can have a main app and "mount" one (or more) sub-application(s).

## Mounting a **FastAPI** application { #mounting-a-fastapi-application }

	"github.com/minio/minio/internal/event/target"
	"github.com/minio/minio/internal/logger"
	xnet "github.com/minio/pkg/v3/net"
	"github.com/minio/pkg/v3/quick"
)

// Save config file to corresponding backend
func Save(configFile string, data any) error {
	return quick.SaveConfig(data, configFile, globalEtcdClient)
}

// Load config from backend
func Load(configFile string, data any) (quick.Config, error) {