# Primeros pasos

Un archivo muy simple de FastAPI podría verse así:

```Python
{!../../docs_src/first_steps/tutorial001.py!}
```

Copia eso a un archivo `main.py`.

Corre el servidor en vivo:

<div class="termy">

```console
$ uvicorn main:app --reload

<span style="color: green;">INFO</span>:     Uvicorn running on http://127.0.0.1:8000 (Press CTRL+C to quit)

	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
	github.com/prometheus/prom2json v1.4.0 // indirect
	github.com/prometheus/prometheus v0.54.1 // indirect
	github.com/rivo/uniseg v0.4.7 // indirect
	github.com/rjeczalik/notify v0.9.3 // indirect
	github.com/rs/xid v1.6.0 // indirect
	github.com/safchain/ethtool v0.4.1 // indirect
	github.com/shoenig/go-m1cpu v0.1.6 // indirect

///

Um único ponto `.`, como em:

```Python
from .dependencies import get_token_header
```

significaria:

* Começando no mesmo pacote em que este módulo (o arquivo `app/routers/items.py`) vive (o diretório `app/routers/`)...
* encontre o módulo `dependencies` (um arquivo imaginário em `app/routers/dependencies.py`)...
* e dele, importe a função `get_token_header`.

	github.com/pkg/errors v0.9.1 // indirect
	github.com/planetscale/vtprotobuf v0.6.1-0.20240409071808-615f978279ca // indirect
	github.com/quic-go/qpack v0.5.1 // indirect
	github.com/rivo/uniseg v0.4.6 // indirect
	github.com/russross/blackfriday/v2 v2.1.0 // indirect
	github.com/sagikazarmark/locafero v0.4.0 // indirect
	github.com/sagikazarmark/slog-shim v0.1.0 // indirect

github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=

github.com/quic-go/quic-go v0.48.1/go.mod h1:yBgs3rWBOADpga7F+jJsb6Ybg1LSYiQvwWlLX+/6HMs=
github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
github.com/rivo/uniseg v0.4.6 h1:Sovz9sDSwbOz9tgUy8JpT+KgCkPYJEN/oYzlJiYTNLg=
github.com/rivo/uniseg v0.4.6/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=

2BO,SAAA,SA3BP,wCA+BO,cAAA,MACA,aAAA,MAhCP,6B9B8uIH,mCAA4G,gCAAnC,gCAAnC,gCAAyG,gC8BxsIvI,cAAA,OAAA,UAAA,OAtCL,qCAqDK,SAAA,QArDL,mCAyDK,QAAA,sBAAA,QAAA,eAGA,wBAAA,KAAA,WAAA,KA5DL,kCAgEK,QAAA,MlBhJN,4BkBgFC,6B9BkwIH,mCAA4G,gCAAnC,gCAAnC,gCAAyG,gC8B/vIvI,cAAA,EACA,aAAA,GlBjGN,yBkB6FA,kBAoBI,cAAA,IAAA,OAAA,UAAA,IAAA,OACA,cAAA,MAAA,gBAAA,WArBH,8BAwBK,mBAAA,IAAA,eAAA,IAxBL,6CA2BO,SAAA,SA3BP,wCA+BO,cAAA,MACA,aAAA,MAhCP,6B9B2xIH,mCAA4G,gCAAnC,gCAAnC,gCAAyG,gC8BrvIvI,cAAA,OAAA,UAAA,OAtCL,qCAqDK,SAAA,QAr...

official policies, either expressed or implied, of Richard Crowley.

================================================================

github.com/rivo/uniseg
https://github.com/rivo/uniseg
----------------------------------------------------------------
MIT License

Copyright (c) 2019 Oliver Kuederle