Distinct method should allow to pass optional query, like in MongoDB doc:

http://www.mongodb.org/display/DOCS/Aggregation#Aggregation-Distinct

Example MongoDB code:

> db.address.distinct( "zip-code" ,

{ age : 30 }

)

Using pymongo

> db.address.distinct("zip-code" ,

{'age': 30}

)

raises exception:

TypeError: distinct() takes exactly 2 arguments (3 given)