Xianfeng Song's Web Site

The urlfetch_stub.py has bug. Replaced the original one by the attached one:

It is located at:

/Applications/GoogleAppEngineLauncher.app/
Contents/Resources/GoogleAppEngine-1.0.bundle/
Contents/Resources/google_appengine/

if you install GoogleAppEngineLaucher.app under /Applications

Tip: Query filters do not have an explicit way to match just part of a string value, but you can fake a prefix match using inequality filters:

db.GqlQuery("SELECT * FROM MyModel WHERE prop >= :1 AND prop < :2", "abc", "abc" + "\xEF\xBF\xBD")

This matches every MyModel entity with a string property prop that begins with the characters abc. The byte string "\xEF\xBF\xBD" represents the largest possible Unicode character. When the property values are sorted in an index, the values that fall in this range are all of the values that begin with the given prefix.