Can't download GAE source code

Here's the command I'm using:

appcfg.py download_app -A --application= appid

Output:

/usr/local/bin/appcfg.py:42: DeprecationWarning: the sha module is deprecated; use the hashlib module instead
  os.path.join(DIR_PATH, 'lib', 'django_0_96'),
/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver_login.py:33: DeprecationWarning: the md5 module is deprecated; use hashlib instead
  import md5
Host: appengine.google.com
Fetching file list...
Email: [email]  
Password for [email]: 
Error 400: --- begin server output ---

Client Error (400)
The request is invalid for an unspecified reason.
--开发者_C百科- end server output ---

My email/pw is correct. Can anyone help me translate this error?

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Looking at the documentation, the format for that command is:

appcfg.py download_app -A <application-id> -V <application-version> <output-dir>

Looks like there's a bug in the documentation, as when I try it, the <output-dir> parameter is required.

So your call ought to look like this to download to the current directory (.)

appcfg.py download_app -A appid .

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I had this problem myself. The order of arguments makes a difference. The appid and version (optional) need to appear before "download_app".

The following worked for me:

appcfg.py -A appid download_app ../../path/to/directory/

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The command below worked for me:

appcfg.py download_app -A s~xxx -V 1.374941992621083247 .

My site is http://xxx.appspot.com but instead of -A xxx, I used -A s~xxx.

s~xxx and version_id 1.374941992621083247 can be taken from the url in your App Engine console like this:

https://appengine.google.com/logs?&app_id=s~xxx&version_id=1.374941992621083247