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**

lit==17.0.6 \
    --hash=sha256:dfa9af9b55fc4509a56be7bf2346f079d7f4a242d583b9f2e0b078fd0abae31b
    # via -r ci/official/requirements_updater/requirements.in
markdown==3.8 \
    --hash=sha256:794a929b79c5af141ef5ab0f2f642d0f7b1872981250230e72682346f7cc90dc \
    --hash=sha256:7df81e63f0df5c4b24b7d156eb81e4690595239b7d70937d0409f1b0de319c6f
    # via tb-nightly
markdown-it-py==3.0.0 \

lit==17.0.6 \
    --hash=sha256:dfa9af9b55fc4509a56be7bf2346f079d7f4a242d583b9f2e0b078fd0abae31b
    # via -r ci/official/requirements_updater/requirements.in
markdown==3.8 \
    --hash=sha256:794a929b79c5af141ef5ab0f2f642d0f7b1872981250230e72682346f7cc90dc \
    --hash=sha256:7df81e63f0df5c4b24b7d156eb81e4690595239b7d70937d0409f1b0de319c6f
    # via tb-nightly
markdown-it-py==3.0.0 \

lit==17.0.6 \
    --hash=sha256:dfa9af9b55fc4509a56be7bf2346f079d7f4a242d583b9f2e0b078fd0abae31b
    # via -r ci/official/requirements_updater/requirements.in
markdown==3.8 \
    --hash=sha256:794a929b79c5af141ef5ab0f2f642d0f7b1872981250230e72682346f7cc90dc \
    --hash=sha256:7df81e63f0df5c4b24b7d156eb81e4690595239b7d70937d0409f1b0de319c6f
    # via tb-nightly
markdown-it-py==3.0.0 \

.call(n.default(ot),"toggle")})),n.default(document).on("keyup",lt,(function(e){return 38==e.keyCode?(e.preventDefault(),void n.default(ft).children().last().focus()):40==e.keyCode?(e.preventDefault(),void n.default(ft).children().first().focus()):void setTimeout((function(){ht._jQueryInterface.call(n.default(ot),"search")}),100)})),n.default(document).on("keydown",ft,(function(e){var t=n.default(":focus");38==e.keyCode&&(e.preventDefault(),t.is(":first-child")?t.siblings().last().focus():t.prev...

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

```Python hl_lines="3"
import os

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

/// tip | Dica

O segundo parâmetro em <a href="https://docs.python.org/3.8/library/os.html#os.getenv" class="external-link" target="_blank">`os.getenv()`</a> é o valor padrão para o retorno.

		37: {
			IsTruncated: false,
			Objects: []ObjectInfo{
				{Name: "foo/201910/1112"},
				{Name: "foo/201910/1122"},
			},
		},
		// ListObjectsResult-38 list with prefix match 1 level deep
		38: {
			IsTruncated: false,
			Objects: []ObjectInfo{
				{Name: "foo/201910/1112"},
				{Name: "foo/201910/1122"},
				{Name: "foo/201910/2112"},
				{Name: "foo/201910_txt"},
			},

pkg debug/dwarf, const TagClassType = 2
pkg debug/dwarf, const TagCommonDwarfBlock = 26
pkg debug/dwarf, const TagCommonInclusion = 27
pkg debug/dwarf, const TagCompileUnit = 17
pkg debug/dwarf, const TagConstType = 38
pkg debug/dwarf, const TagConstant = 39
pkg debug/dwarf, const TagDwarfProcedure = 54
pkg debug/dwarf, const TagEntryPoint = 3
pkg debug/dwarf, const TagEnumerationType = 4
pkg debug/dwarf, const TagEnumerator = 40