```

</div>

**SANGAT disarankan** agar kamu menulis atau menyalin kode, mengubahnya dan menjalankannya secara lokal.

Dengan menggunakannya di dalam editor, benar-benar memperlihatkan manfaat dari FastAPI, melihat bagaimana sedikitnya kode yang harus kamu tulis, semua pengecekan tipe, pelengkapan otomatis, dll.

---

## Install FastAPI

    ```Python hl_lines="10"
    {!> ../../../docs_src/header_params/tutorial002.py!}
    ```

!!! warning
    Before setting `convert_underscores` to `False`, bear in mind that some HTTP proxies and servers disallow the usage of headers with underscores.

## Duplicate headers

It is possible to receive duplicate headers. That means, the same header with multiple values.

// see also: https://registry.in/policies
// Please note, that nic.in is not an official eTLD, but used by most
// government institutions.
in
5g.in
6g.in
ac.in
ai.in
am.in
bihar.in
biz.in
business.in
ca.in
cn.in
co.in
com.in
coop.in
cs.in
delhi.in
dr.in
edu.in
er.in
firm.in
gen.in
gov.in
gujarat.in
ind.in
info.in