[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],["最后更新时间 (UTC)：2025-09-04。"],[[["\u003cp\u003eThis API supports first-generation runtimes and can be used when upgrading to corresponding second-generation runtimes.\u003c/p\u003e\n"],["\u003cp\u003eThe Modules API provides functions to access information about the current operating environment, including module, version, and instance details.\u003c/p\u003e\n"],["\u003cp\u003eThe API allows retrieving the address of a specific module, version, or instance, facilitating inter-instance communication within an application.\u003c/p\u003e\n"],["\u003cp\u003eTo utilize the Modules API, you must import the \u003ccode\u003egoogle.appengine.api.modules\u003c/code\u003e module from the SDK.\u003c/p\u003e\n"],["\u003cp\u003eThe API can retrieve the hostname of a specific target module to allow communication between modules in the same app.\u003c/p\u003e\n"]]],[],null,["# Using the Modules API\n\n| This API is supported for first-generation runtimes and can be used when [upgrading to corresponding second-generation runtimes](/appengine/docs/standard/\n| python3\n|\n| /services/access). If you are updating to the App Engine Python 3 runtime, refer to the [migration guide](/appengine/migration-center/standard/migrate-to-second-gen/python-differences) to learn about your migration options for legacy bundled services.\n\nThe Modules API provides functions that return information about the current\noperating environment (module, version, and instance).\n\nThe Modules API also has functions that retrieve the address of a module, a\nversion, or an instance. This allows an application to send requests from one\ninstance to another, in both the development and production environments.\n\nYou must import the `google.appengine.api.modules` module from the SDK. \n\n from google.appengine.api import modules\n\nThe following code sample shows how to get the module name and instance id for\na request: \n\n module = modules.get_current_module_name()\n instance_id = modules.get_current_instance_id()\n self.response.write(\n 'module_id={}&instance_id={}'.format(module, instance_id))\n\nThe instance ID of an automatic scaled module will be returned as a unique\nbase64 encoded value, e.g. `e4b565394caa`.\n\nYou can communicate between modules in the same app by fetching the hostname of\nthe target module: \n\n backend_hostname = modules.get_hostname(module='my-backend')\n url = \"http://{}/\".format(backend_hostname)\n try:\n result = urllib2.urlopen(url).read()\n self.response.write('Got response {}'.format(result))\n except urllib2.URLError:\n pass\n\nYou can also use the [URL Fetch](/appengine/docs/legacy/standard/python/issue-requests) service."]]
