I need to do full text searching with Google App Engine. I found the project Whoosh and it works really well, as long as I use the App Engine Development Environement... When I upload my application to App Engine, I am getting the following TraceBack. For my tests, I am using the example application provided in this project. Any idea of what I am doing wrong?

<type 'exceptions.ImportError'>: cannot import name loads
Traceback (most recent call last):
  File "/base/data/home/apps/myapp/1.334374478538362709/hello.py", line 6, in <module>
    from whoosh import store
  File "/base/data/home/apps/myapp/1.334374478538362709/whoosh/__init__.py", line 17, in <module>
    from whoosh.index import open_dir, create_in
  File "/base/data/home/apps/myapp/1.334374478538362709/whoosh/index.py", line 31, in <module>
    from whoosh import fields, store
  File "/base/data/home/apps/myapp/1.334374478538362709/whoosh/store.py", line 27, in <module>
    from whoosh import tables
  File "/base/data/home/apps/myapp/1.334374478538362709/whoosh/tables.py", line 43, in <module>
    from marshal import loads

Here is the import I have in my Python file.

# Whoosh ----------------------------------------------------------------------
sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'utils')))
from whoosh.fields import Schema, STORED, ID, KEYWORD, TEXT
from whoosh.index import getdatastoreindex
from whoosh.qparser import QueryParser, MultifieldParser

Thank you in advance for your help!