python-2.7 - appcfg.py 在命令行中不工作

Question

我只是有点难以理解为什么要执行此命令:

>appcfg.py -A adept-box-109804 update app.yaml

“立即试用 Google App Engine”页面提供的内容不起作用。我已经下载了适用于 Python 的 App Engine SDK，并将 Path 设置为指向 appcfg.py 的位置，但是在我的项目根目录中运行 appcfg.py 在命令行中不起作用。我要么必须导航到包含 appcfg.py 的文件夹并执行

>python appcfg.py help

或者做

>python "C:\Program Files (x86)\Google\google_appengine\appcfg.py" help

让命令在任何地方工作。我使用后一种方法来部署我的测试应用程序，但只是想知道是否有人可以解释为什么简单的 Google 教程给出的命令没有执行任何操作。我还检查以确保使用 Python 2.7 解释器自动打开 .py 文件，这样文件 hello.py 将在命令行中通过简单地键入来执行

>hello.py

它会输出它的打印语句。另一方面，无论参数如何，以类似方式使用 appcfg.py 都会得到相同的输出(请注意我截断了输出，但请放心，无论参数如何，它们都是相同的:

C:\>appcfg.py help backends
Usage: appcfg.py [options] <action>

Action must be one of:
  backends: Perform a backend action.
  backends configure: Reconfigure a backend without stopping it.
  backends delete: Delete a backend.
  backends list: List all backends configured for the app.
  backends rollback: Roll back an update of a backend.
  backends start: Start a backend.
  backends stop: Stop a backend.
  backends update: Update one or more backends.
  create_bulkloader_config: Create a bulkloader.yaml from a running application.
  cron_info: Display information about cron jobs.
  delete_version: Delete the specified version for an app.
  download_app: Download a previously-uploaded app.
  download_data: Download entities from datastore.
  help: Print help for a specific action.
  list_versions: List all uploaded versions for an app.
  request_logs: Write request logs in Apache common log format.
  resource_limits_info: Get the resource limits.
  rollback: Rollback an in-progress update.
  set_default_version: Set the default (serving) version.
  start_module_version: Start a module version.
  stop_module_version: Stop a module version.
  update: Create or update an app version.
  update_cron: Update application cron definitions.
  update_dispatch: Update application dispatch definitions.
  update_dos: Update application dos definitions.
  update_indexes: Update application indexes.
  update_queues: Update application task queue definitions.
  upload_data: Upload data records to datastore.
  vacuum_indexes: Delete unused indexes from application.
Use 'help <action>' for a detailed description.

C:\>appcfg.py help update
Usage: appcfg.py [options] <action>

Action must be one of:
  backends: Perform a backend action.
  backends configure: Reconfigure a backend without stopping it.
  backends delete: Delete a backend.
  backends list: List all backends configured for the app.
  backends rollback: Roll back an update of a backend.
  backends start: Start a backend.
  backends stop: Stop a backend.
  backends update: Update one or more backends.
  create_bulkloader_config: Create a bulkloader.yaml from a running application.
  cron_info: Display information about cron jobs.
  delete_version: Delete the specified version for an app.
  download_app: Download a previously-uploaded app.
  download_data: Download entities from datastore.
  help: Print help for a specific action.
  list_versions: List all uploaded versions for an app.
  request_logs: Write request logs in Apache common log format.
  resource_limits_info: Get the resource limits.
  rollback: Rollback an in-progress update.
  set_default_version: Set the default (serving) version.
  start_module_version: Start a module version.
  stop_module_version: Stop a module version.
  update: Create or update an app version.
  update_cron: Update application cron definitions.
  update_dispatch: Update application dispatch definitions.
  update_dos: Update application dos definitions.
  update_indexes: Update application indexes.
  update_queues: Update application task queue definitions.
  upload_data: Upload data records to datastore.
  vacuum_indexes: Delete unused indexes from application.
Use 'help <action>' for a detailed description.

Answer 1

我终于找到了真正的原因，这不是 AppEngine SDK 的错误。相反，它与我的 Python 解释器有关，因为我注意到它不接受任何 .py 文件的参数。原来是一个注册表错​​误，位于 [HKEY_CLASSES_ROOT\Applications\python.exe\shell\open\command] 我不得不从 "C:\Python27\python.exe""%1" 到 "C:\Python27\python.exe""%1"%*

这是怎么发生的，无论是 Python 2.7 安装程序，还是 AppEngine SDK，我都不确定。