human
What is a the Python program you requested given the following:
Complete the below
def connect(dbn, **kw):

    ''''Connects to the specified database.
    db currently must be "postgres" or "mysql".
    If DBUtils is installed, connection pooling will be used.'
    '''
assistant
#Here is the Python program you requested.
    if (dbn == 'postgres'):
        try:
            import psycopg2 as db
        except ImportError:
            try:
                import psycopg as db
            except ImportError:
                import pgdb as db
        kw['password'] = kw['pw']
        del kw['pw']
        kw['database'] = kw['db']
        del kw['db']
    elif (dbn == 'mysql'):
        import MySQLdb as db
        kw['passwd'] = kw['pw']
        del kw['pw']
        db.paramstyle = 'pyformat'
    else:
        raise UnknownDB, dbn
    ctx.db_name = dbn
    ctx.db_module = db
    ctx.db_transaction = False
    if _hasPooling:
        if ('db' not in globals()):
            globals()['db'] = PooledDB(dbapi=db, **kw)
        ctx.db = globals()['db'].connection()
    else:
        ctx.db = db.connect(**kw)
    ctx.dbq_count = 0
    if globals().get('db_printing'):
        def db_execute(cur, q, d=None):
            ctx.dbq_count += 1
            try:
                outq = (q % tuple(d))
            except:
                outq = q
            print >>debug, (str(ctx.dbq_count) + ':'), outq
            a = time.time()
            out = cur.execute(q, d)
            b = time.time()
            print >>debug, ('(%s)' % round((b - a), 2))
            return out
        ctx.db_execute = db_execute
    else:
        ctx.db_execute = (lambda cur, q, d=None: cur.execute(q, d))
    return ctx.db