Examples:

    Source (English):

        «««
        //// tab | Python 3.8+ non-Annotated
        Hello
        ////
        »»»

    Result (German):

        «««
        //// tab | Python 3.8+ nicht annotiert
        Hallo
        ////
        »»»

    Source (English) – Here there is nothing to translate in the tab title:

  - [Changelog since v1.3.9](#changelog-since-v139)
    - [Other notable changes](#other-notable-changes)
- [v1.3.9](#v139)
  - [Downloads](#downloads)
  - [Changelog since v1.3.8](#changelog-since-v138)
    - [Other notable changes](#other-notable-changes-1)
- [v1.3.8](#v138)
  - [Downloads](#downloads-1)
  - [Changelog since v1.3.7](#changelog-since-v137)
    - [Other notable changes](#other-notable-changes-2)
- [v1.3.7](#v137)

例如，你可以创建一个名为 `main.py` 的文件，其中包含以下内容：

```Python hl_lines="3"
import os

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

/// tip

第二个参数是 <a href="https://docs.python.org/zh-cn/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> 的默认返回值。

如果没有提供，默认值为 `None`，这里我们提供 `"World"` 作为默认值。

///

然后你可以调用这个 Python 程序：

//// tab | Linux, macOS, Windows Bash

{!> ../../docs_src/python_types/tutorial011_py310.py!}
```

////

//// tab | Python 3.9+

```Python
{!> ../../docs_src/python_types/tutorial011_py39.py!}
```

////

//// tab | Python 3.8+

```Python
{!> ../../docs_src/python_types/tutorial011.py!}
```

////


/// info

想进一步了解 <a href="https://docs.pydantic.dev/" class="external-link" target="_blank">Pydantic，请阅读其文档</a>.

pkg debug/elf, const R_390_TLS_GD32 = 40
pkg debug/elf, const R_390_TLS_GD32 R_390
pkg debug/elf, const R_390_TLS_GD64 = 41
pkg debug/elf, const R_390_TLS_GD64 R_390
pkg debug/elf, const R_390_TLS_GDCALL = 38
pkg debug/elf, const R_390_TLS_GDCALL R_390
pkg debug/elf, const R_390_TLS_GOTIE12 = 42
pkg debug/elf, const R_390_TLS_GOTIE12 R_390
pkg debug/elf, const R_390_TLS_GOTIE20 = 60
pkg debug/elf, const R_390_TLS_GOTIE20 R_390

                warnings.simplefilter(
                    "ignore", category=UnsupportedFieldAttributeWarning
                )
            # TODO: remove after dropping support for Python 3.8 and
            # setting the min Pydantic to v2.12.3 that adds asdict()
            field_dict = asdict(self.field_info)
            annotated_args = (
                field_dict["annotation"],

pkg debug/elf, const R_MIPS_SHIFT6 = 17
pkg debug/elf, const R_MIPS_SHIFT6 R_MIPS
pkg debug/elf, const R_MIPS_SUB = 24
pkg debug/elf, const R_MIPS_SUB R_MIPS
pkg debug/elf, const R_MIPS_TLS_DTPMOD32 = 38
pkg debug/elf, const R_MIPS_TLS_DTPMOD32 R_MIPS
pkg debug/elf, const R_MIPS_TLS_DTPMOD64 = 40
pkg debug/elf, const R_MIPS_TLS_DTPMOD64 R_MIPS
pkg debug/elf, const R_MIPS_TLS_DTPREL32 = 39

例えば、以下のような`main.py`ファイルを用意します:

```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> の第2引数は、デフォルトで返される値を指定します。

この引数を省略するとデフォルト値として`None`が返されますが、ここではデフォルト値として`"World"`を指定しています。

///

次に、このPythonプログラムを呼び出します。

    examples/jars/spark-examples*.jar 10
```

The job should produce an output as shown below. Note the value of pi in the output.

```
17/03/22 23:21:10 INFO DAGScheduler: Job 0 finished: reduce at SparkPi.scala:38, took 1.302805 s
Pi is roughly 3.1445191445191445
```

Job status can also be viewed in a browser by navigating to the YARN ResourceManager Web UI and clicking on job history server information.

### **4.2 WordCount**

例如，您可以有一个名为 `main.py` 的文件，其中包含以下内容：

```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> 的第二个参数是要返回的默认值。

如果没有提供默认值，默认为 `None`，此处我们提供了 `"World"` 作为要使用的默认值。

///

然后，您可以调用该 Python 程序：

<div class="termy">