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I receive mongo_ros import error because is no longer included in ros-groovy-warehouse_ros package.

Developers recommend using PyMongo, so I have to adapt my code for the new interface with database. The main changes that I have to do are the following:

1. Change imports:

   import pymongo

   from pymongo import MongoClient

2. Different way to set up the collection:

   self.pyMongoClient = MongoClient('localhost', 27017)
   self.db = self.pyMongoClient['trajectory_db']
   self.coll = self.db['trajectories']
   

3. With mongo_ros I can create a collection of ros msg like JointTrajectory, so I can insert robot trajectories without any manipulation, directly with 'insert' method:

   self.coll.insert(trajectory, self.makeMetaData(traj_name))
   

   With pymongo I don't know how to insert ros msg into database, encode/serialization errors were received. Then I have to develop encode/decode function to convert trajectory points in a serializable objects (array of arrays) and vice versa.

Summarizing, I have to change my insert method, otherwise only little changes are necessary.

Regards.