dev_appserver.py 说未知的运行时“python38”

Question

我正在尝试将几个 python 项目的 GAE 运行时从 python37 升级到 python38。在我们部署之前，我已经使用 dev_appserver.py 在本地测试应用程序，但是在将运行时更改为 python38 后我收到了一个未知的运行时错误。根据appengine 文档， Python 3.8 应该是受支持的运行时。

我还将所有 gcloud cli 组件更新到最新版本。这只是已被更改/弃用而我只是不知道的东西吗？或者它实际上是一个错误并且从dev_appserver.py工具中丢失了？

任何帮助，将不胜感激！:)

RuntimeError: Unknown runtime 'python38'; supported runtimes are 'custom', 'go', 'go111', 'java', 'java7', 'java8', 'php55', 'php72', 'python', 'python-compat', 
'python27', 'python37'.

完整追溯：

Traceback (most recent call last):
  File "/mnt/c/Users/Admin/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/dev_appserver.py", line 96, in <module>
    _run_file(__file__, globals())
  File "/mnt/c/Users/Admin/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/dev_appserver.py", line 90, in _run_file
    execfile(_PATHS.script_file(script_name), globals_)
  File "/mnt/c/Users/Admin/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 613, in <module>
    main()
  File "/mnt/c/Users/Admin/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 601, in main
    dev_server.start(options)
  File "/mnt/c/Users/Admin/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/devappserver2.py", line 373, in start
    options.api_host, apiserver.port, wsgi_request_info_)
  File "/mnt/c/Users/Admin/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/dispatcher.py", line 259, in start
    ssl_port)
  File "/mnt/c/Users/Admin/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/dispatcher.py", line 396, in _create_module
    ssl_port=ssl_port)
  File "/mnt/c/Users/Admin/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/module.py", line 1313, 
in __init__
    super(AutoScalingModule, self).__init__(**kwargs)
  File "/mnt/c/Users/Admin/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/module.py", line 599, in __init__
    self._module_configuration)
  File "/mnt/c/Users/Admin/AppData/Local/Google/Cloud SDK/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/module.py", line 226, in _create_instance_factory
    sorted(repr(k) for k in runtime_factories.FACTORIES))))
RuntimeError: Unknown runtime 'python38'; supported runtimes are 'custom', 'go', 'go111', 'java', 'java7', 'java8', 'php55', 'php72', 'python', 'python-compat', 
'python27', 'python37'.

Answer 1

更新：也适用于 python39 运行时！

我找到了一个 hacky 的解决方法！

我找到并编辑了位于 gcloud devappserver2 工具目录中的 runtime_factories.py 文件。在我的 Ubuntu 18.04 安装中，它位于：

/usr/lib/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/runtime_factories.py

我添加python38到两者MODERN_RUNTIMES并FACTORIES喜欢这样：

MODERN_RUNTIMES = set(['python38', 'python37', 'go111'])


FACTORIES = {
    'go': go_factory.GoRuntimeInstanceFactory,
    'go111': go_factory.GoRuntimeInstanceFactory,
    'php55': php_factory.PHPRuntimeInstanceFactory,
    'php72': php_factory.PHPRuntimeInstanceFactory,
    'python': python_factory.PythonRuntimeInstanceFactory,
    'python38': python_factory.PythonRuntimeInstanceFactory,
    'python37': python_factory.PythonRuntimeInstanceFactory,
    'python27': python_factory.PythonRuntimeInstanceFactory,
    'python-compat': python_factory.PythonRuntimeInstanceFactory,
    'custom': custom_factory.CustomRuntimeInstanceFactory,
}

然后点击保存，再次运行 dev_appserver.py 并且成功了！我还确认它实际上正在运行 python38 运行时！

这意味着 dev_appserver.py 工具支持的运行时列表尚未更新为最新的 python 运行时

...谷歌如果你看到这个请更新这个工具，这样其他人就不必这样做了！