asynctools is a library allowing you to execute Google App Engine API calls in parallel. API calls can be mixed together and queued up and then all are kicked off in parallel. Callbacks can be used to operate over completed calls immediately, if desired.

Currently, wrappers for Query and UrlFetch API calls are available. More will come over time.

Additionally, CachedMultiTask provides a mechanism to transparently cache the results of the parallel API calls.

An example invocation kicking off a set of parallel data store queries is as follows:

```

set up the async queries

runner = AsyncMultiTask() for fbuid in facebook_user_ids: query = db.GqlQuery("SELECT key FROM Account WHERE facebook_id = :1", uid) runner.append(QueryTask(query, limit=1, client_state=fbuid))

kick off the work

runner.run()

peel out the results

for task in runner: task_result = task.get_result() # will raise any exception that occurred for the given query print '%s: %s' % (task.client_state, task_result[0])

```