উদাহরণস্বরূপ, আপনার `main.py` নামে একটি ফাইল থাকতে পারেঃ

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip

<a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> এর দ্বিতীয় আর্গুমেন্টটি হলো এর ডিফল্ট ভ্যালু যা রিটার্ন করা হবে।

```Python hl_lines="3"
import os

name = os.getenv("MY_NAME", "World")
print(f"Hello {name} from Python")
```

/// tip | Consejo

El segundo argumento de <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> es el valor por defecto a retornar.

<?xml version="1.0" encoding="UTF-8"?>
<foo xmlns:xi="http://www.w3.org/2001/XInclude">
	<xi:include href="/included.xml"/>

# This workflow will build a Java project with Maven
# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-maven

name: Java CI with Maven

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  build:

    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v4
    - name: Set up JDK 17

///

## Anwendungsfälle

Einige Anwendungsfälle sind:

* Konvertieren von Nicht-JSON-Requestbodys nach JSON (z. B. <a href="https://msgpack.org/index.html" class="external-link" target="_blank">`msgpack`</a>).
* Dekomprimierung gzip-komprimierter Requestbodys.
* Automatisches Loggen aller Requestbodys.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components namespace="fessCrawler">
	<include path="crawler/container.xml" />

	<component name="logHelper"
		class="org.codelibs.fess.crawler.helper.impl.LogHelperImpl">
	</component>

    }
    taskFaker.runNextTask()

    // Check that a rebuilt journal behaves normally.
    assertValue("a", "a", "a")
    assertValue("b", "b", "b")
  }

  /** @see [Issue 28](https://github.com/JakeWharton/DiskLruCache/issues/28) */
  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)
  fun rebuildJournalOnRepeatedReadsWithOpenAndClose(parameters: Pair<FileSystem, Boolean>) {

## `Union` ⚖️ `anyOf`

👆 💪 📣 📨 `Union` 2️⃣ 🆎, 👈 ⛓, 👈 📨 🔜 🙆 2️⃣.

⚫️ 🔜 🔬 🗄 ⏮️ `anyOf`.

👈, ⚙️ 🐩 🐍 🆎 🔑 <a href="https://docs.python.org/3/library/typing.html#typing.Union" class="external-link" target="_blank">`typing.Union`</a>:

/// note

#                                                     Tomcat
#                                                     ------
tomcat.URIEncoding = UTF-8
tomcat.useBodyEncodingForURI = true
#tomcat.secure=false
#tomcat.scheme=http
#tomcat.bindAddress=127.0.0.1
#tomcat.proxyPort=

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE components PUBLIC "-//DBFLUTE//DTD LastaDi 1.0//EN"
	"http://dbflute.org/meta/lastadi10.dtd">
<components>
	<component name="assistantDirector" class="org.codelibs.fess.mylasta.direction.FessFwAssistantDirector"/>
	<component name="fessConfig" class="org.codelibs.fess.mylasta.direction.FessConfigImpl"/>