import mysql.connector
import sshtunnel

with sshtunnel.SSHTunnelForwarder(
        (_host, _ssh_port),
        ssh_username=_username,
        ssh_password=_password,
        remote_bind_address=(_remote_bind_address, _remote_mysql_port),
        local_bind_address=(_local_bind_address,_local_mysql_port)
) as tunnel:
        connection = mysql.connector.connect(
                user=_db_user,
                passwd=_db_password,
                host=_local_bind_address,
                database=_db_name,
                port=_local_mysql_port)

csr = connection.cursor()

Traceback (most recent call last):
  File "dbtest1.py", line 30, in <module>
    csr = connection.cursor()
  File "/usr/local/lib/python2.7/dist-packages/mysql/connector/connection.py", line 848, in cursor
    raise errors.OperationalError("MySQL Connection not available.")
mysql.connector.errors.OperationalError: MySQL Connection not available.