psycopg concurrency control

I am working on a project using psycopg2 together with python 2.7 where I have one writer to a DB table  and  multiple readers from the same table.  On python I am using the TCP socketserver  with the ThreadingMixin where each thread create their own connection and cursor  ,  read the data  and then  commit  and close.  This is working fine.

Right now I have a situation where  I can  have multiple writers to the same table  and there is a chance for  concurrency issues .

I am not a  Postgres guy  but  I tried to  read the  documentation and  I  believe that   Explicit Locking -->  Table level Locks -->  ROW EXCLUSIVE  are the way to go .

Can  someone give me some guidance on the concurrency control and  important   also  how  I can  translate this  into   python psycopg code ??

Many thanks