Let's look at how we can make that work.

## pytest.mark.anyio

The process that happens when your API app calls the *external API* is named a "callback". Because the software that the external developer wrote sends a request to your API and then your API *calls back*, sending a request to an *external API* (that was probably created by the same developer).

mdfaijul, MichaëL Defferrard, Michał JastrzęBski, Michele Colombo, Mike Brodie,
Mosnoi Ion, mouradmourafiq, myPrecious, Nayana Thorat, Neeraj Kashyap, Nelson
Liu, Niranjan Hasabnis, Olivier Moindrot, orome, Pankaj Gupta, Paul Van Eck,
peeyush18, Peng Yu, Pierre, preciousdp11, qjivy, Raingo, raoqiyu, ribx, Richard
S. Imaoka, Rishabh Patel, Robert Walecki, Rockford Wei, Ryan Kung, Sahil Dua,

des systèmes tel qu'Instagram.

Il est relativement fortement couplé aux bases de données relationnelles (comme MySQL ou PostgreSQL), de sorte qu'il
n'est pas très facile d'utiliser une base de données NoSQL (comme Couchbase, MongoDB, Cassandra, etc.) comme principal moyen de
stockage.

## Version 4.0.0

_2019-06-26_

**This release upgrades OkHttp to Kotlin.** We tried our best to make fast and safe to upgrade
from OkHttp 3.x. We wrote an [upgrade guide][upgrading_to_okhttp_4] to help with the migration and a
[blog post][okhttp4_blog_post] to explain it.

 *  Fix: Target Java 8 bytecode for Java and Kotlin.


## Version 4.0.0-RC3

    val response = get(server.url("/"))
    assertThat(response.header("")).isEqualTo("A")
    assertThat(response.body.string()).isEqualTo("body")
  }

  /**
   * Old implementations of OkHttp's response cache wrote header fields like ":status: 200 OK". This
   * broke our cached response parser because it split on the first colon. This regression test
   * exists to help us read these old bad cache entries.
   *

Ich denke, `Union[SomeType, None]` ist expliziter bezüglich seiner Bedeutung.

Es geht nur um Wörter und Namen. Aber diese Worte können beeinflussen, wie Sie und Ihre Teamkollegen über den Code denken.

Nehmen wir zum Beispiel diese Funktion:

```Python hl_lines="1  4"
{!../../../docs_src/python_types/tutorial009c.py!}
```

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07FB..07FC    ; disallowed                             # NA   <reserved-07FB>..<reserved-07FC>
07FD          ; valid                                  # 11.0 NKO DANTAYALAN
07FE..07FF    ; valid                  ;      ; NV8    # 11.0 NKO DOROME SIGN..NKO TAMAN SIGN
0800..082D    ; valid                                  # 5.2  SAMARITAN LETTER ALAF..SAMARITAN MARK NEQUDAA
082E..082F    ; disallowed                             # NA   <reserved-082E>..<reserved-082F>