title: pymongo to work with multiple db - readreplica set , main mongodb server
body: <p>using pymongo can we direct the read operation to readreplica set and write operation to main mongodb server.</p>
  
  <p>For e.g. When I do db.mycollection.find It should access Readreplica MongoDB and when we do db.mycollection.update or db.mycollection.remove It should access main MongoDB to do the operation.</p>