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">

```console

labels.facet_contentLength_250kto500k	=	250kb - 500kb
labels.facet_contentLength_1mto5m	=	1mb - 5mb
labels.facet_contentLength_5m	=	5mb -  
labels.facet_filetype_title	=	Type de fichier
labels.facet_filetype_html	=	HTML
labels.facet_filetype_word	=	MS Word
labels.facet_filetype_excel	=	MS Excel
labels.facet_filetype_powerpoint	=	MS PowerPoint
labels.facet_filetype_odt	=	ODF Word
labels.facet_filetype_ods	=	Tableur ODF

            Type[Response],
            Doc(
                """
                The default response class to be used.

                Read more in the
                [FastAPI docs for Custom Response - HTML, Stream, File, others](https://fastapi.tiangolo.com/advanced/custom-response/#default-response-class).

                **Example**

                ```python
                from fastapi import FastAPI

:!0,processData:!0,async:!0,contentType:"application/x-www-form-urlencoded; charset=UTF-8",accepts:{"*":pc,text:"text/plain",html:"text/html",xml:"application/xml, text/xml",json:"application/json, text/javascript"},contents:{xml:/xml/,html:/html/,json:/json/},responseFields:{xml:"responseXML",text:"responseText",json:"responseJSON"},converters:{"* text":String,"text html":!0,"text json":n.parseJSON,"text xml":n.parseXML},flatOptions:{url:!0,context:!0}},ajaxSetup:function(a,b){return b?tc(tc(a,...

                    FailureUrl failureUrl = new FailureUrl();
                    failureUrl.setId("E" + i);
                    failureUrl.setUrl("http://test.com/" + i + ".html");
                    failureUrl.setErrorCount(i);
                    failureUrl.setErrorName("TestError" + i);
                    list.add(failureUrl);
                }
                return list;
            }

labels.facet_contentLength_100kto500k=100kb - 500kb
labels.facet_contentLength_500kto1m=500kb - 1mb
labels.facet_contentLength_1m=1mb -  
labels.facet_filetype_title = 파일 형식
labels.facet_filetype_html = HTML
labels.facet_filetype_word = MS Word
labels.facet_filetype_excel = MS Excel
labels.facet_filetype_powerpoint = MS PowerPoint
labels.facet_filetype_odt = ODF Word
labels.facet_filetype_ods = ODF Spreadsheet

pullPolicy: IfNotPresent ## minio mode, i.e. standalone or distributed or gateway (nas) ## Distributed MinIO ref: https://docs.minio.io/docs/distributed-minio-quickstart-guide ## NAS Gateway MinIO ref: https://docs.min.io/docs/minio-gateway-for-nas.html mode: distributed ## NOTE: currently only "nas" gateway is supported. ## Additional labels to include with deployment or statefulset additionalLabels: [] ## Additional annotations to include with deployment or statefulset additionalAnnotation: [] ##...

pullPolicy: IfNotPresent ## minio mode, i.e. standalone or distributed or gateway (nas) ## Distributed MinIO ref: https://docs.minio.io/docs/distributed-minio-quickstart-guide ## NAS Gateway MinIO ref: https://docs.min.io/docs/minio-gateway-for-nas.html mode: distributed ## NOTE: currently only "nas" gateway is supported. ## Additional labels to include with deployment or statefulset additionalLabels: [] ## Additional annotations to include with deployment or statefulset additionalAnnotation: [] ##...

          "showLineNumbers": false,
          "showMiniMap": false
        },
        "content": "<div class=\"dashboard-header text-center\">\n<span>SERVICE: $service</span>\n</div>",
        "mode": "html"
      },
      "pluginVersion": "10.1.5",
      "transparent": true,
      "type": "text"
    },
    {
      "datasource": {
        "type": "prometheus",
        "uid": "${datasource}"
      },

          spec:
            description: 'Extend the functionality provided by the Istio proxy through
              WebAssembly filters. See more details at: https://istio.io/docs/reference/config/proxy_extensions/wasm-plugin.html'
            properties:
              failStrategy:
                description: |-
                  Specifies the failure behavior for the plugin due to fatal errors.