f = open('tabledefinition.sql')
full_sql = f.read()
sql_commands = full_sql.split(';')

for sql_command in sql_commands:
    curs.execute(sql_command)

dsn_tns = cx_Oracle.makedsn('server', 'port', service_name='service_name')
conn = cx_Oracle.connect(user='username', password='password', dsn=dsn_tns)