Removing @cache() decorator from thank_yous, producer_messages, and header in refresh.py due to PicklingError: Can't pickle <type 'function'>: attribute lookup __builtin__.function failed

gistfile1.txt

Traceback (most recent call last):
  File "/home/john/webdev/web2py_pledgedrivetracker/gluon/restricted.py", line 194, in restricted
    exec ccode in environment
  File "/home/john/webdev/web2py_pledgedrivetracker/applications/pledgedrives/controllers/refresh.py:thank_yous", line 293, in <module>
  File "/home/john/webdev/web2py_pledgedrivetracker/gluon/globals.py", line 149, in <lambda>
    self._caller = lambda f: f()
  File "/home/john/webdev/web2py_pledgedrivetracker/gluon/cache.py", line 424, in action
    return cache_model(key, func, time_expire)
  File "/home/john/webdev/web2py_pledgedrivetracker/gluon/contrib/gae_memcache.py", line 39, in __call__
    self.set(key, (time.time(), value))
  File "/home/john/webdev/gae_pledgedrivetracker/google/appengine/api/memcache/__init__.py", line 767, in set
    namespace=namespace)
  File "/home/john/webdev/gae_pledgedrivetracker/google/appengine/api/memcache/__init__.py", line 872, in _set_with_policy
    time, '', namespace)
  File "/home/john/webdev/gae_pledgedrivetracker/google/appengine/api/memcache/__init__.py", line 951, in _set_multi_async_with_policy
    stored_value, flags = _validate_encode_value(value, self._do_pickle)
  File "/home/john/webdev/gae_pledgedrivetracker/google/appengine/api/memcache/__init__.py", line 227, in _validate_encode_value
    stored_value = do_pickle(value)
  File "/home/john/webdev/gae_pledgedrivetracker/google/appengine/api/memcache/__init__.py", line 395, in _do_pickle
    pickler.dump(value)
PicklingError: Can't pickle <type 'function'>: attribute lookup __builtin__.function failed