Google App Engine with Eclipse?

I'm trying to use Google App Engine with Eclipse but it's not working.

I downloaded PyDev, and made a Hello World Python app, so that's working fine.

Then I created a new project, with the "Google App Engine" template. I was following these instructions. I used the "Hello Webapp World" as a template, and didn't change any of the Python code. I added the GAE directory to my external libraries.

I then made a run configuration for my project, with the "Main Module" as the "HelloWorld.py" file I had created. I had one "Program Argument":

"${project_loc}/src"

Running this returns the following:

Status: 404 Not Found
Content-Type: text/html; charset=utf-8
Cache-Control: no-cache
Expires:开发者_开发百科 Fri, 01 Jan 1990 00:00:00 GMT
Content-Length: 0

However, if I launch this same app using the Google App Engine Launcher, it works fine. So what am I doing wrong in Eclipse?

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I've dealt with this same problem myself.

The Main Module needs to be set to the following:

${GOOGLE_APP_ENGINE}/dev_appserver.py

It does cover it in the instructions, step 3 under Starting Your First Project. I must have glazed over it myself the first time as well. Hope this helps!