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