Store List of data items in Hbase.

[Ram]

Im trying to store a list,collection of data objects in Hbase. For example ,a 
User table where a the userId is the Rowkey and column family Contacts with 
column Contacts:EmailIds where EmailIds is a list of emails as
{a...@example.com,bp...@gmail.com....etc}
How do we model this in Hbase ? How do we do this in Java?/Python?Ive tried 
pickling and unpickling data in Python but this is one solution which I do not 
want to use due to performance issues.