Issue with having to ad a 'delta'after clk,posedge

test_array_part_3.py

def array_3(clk, reset, Sel1, Sel2, Q):
    ''' testing a 2-dimensional Constant Array
    '''
    aoc = myhdl.Array( [[1,2,3], [4,5,6], [7,8,9]],  myhdl.intbv(0)[len(Q):])
      
    @myhdl.always_seq( clk.posedge, reset = reset)
    def rtlreg():
        Q.next = aoc[Sel2][Sel1]
       
    return rtlreg


def test_array_3():
    clk   = myhdl.Signal( bool( 0 ))
    reset = myhdl.ResetSignal( 0, active = 1, async = True)
    Sel1  = myhdl.Signal( myhdl.intbv(0)[2:])
    Sel2  = myhdl.Signal( myhdl.intbv(0)[2:])
    Q     = myhdl.Signal( myhdl.intbv(0)[4:])

    assert myhdl.conversion.analyze(array_3, clk, reset, Sel1, Sel2, Q ) == 0


def tb_array_3():
    
    clk   = myhdl.Signal( bool( 0 ))
    reset = myhdl.ResetSignal( 0, active = 1, async = True)
    Sel1  = myhdl.Signal( myhdl.intbv(0)[2:])
    Sel2  = myhdl.Signal( myhdl.intbv(0)[2:])
    Q     = myhdl.Signal( myhdl.intbv(0)[4:])

    tbdut = array_3(clk, reset, Sel1, Sel2, Q )
    
    tCK = 10
    RESETLENGTH = 35
    
    @myhdl.instance
    def genreset():   
        reset.next = 1
        yield myhdl.delay( RESETLENGTH )
        reset.next = 0
        
    @myhdl.instance
    def genclk():
        while True:
            clk.next = 1
            yield myhdl.delay( int( tCK // 2 ))
            clk.next = 0
            yield myhdl.delay( tCK - int( tCK // 2 ))
        
    @myhdl.instance
    def stimulus():
        Sel1.next = 2
        Sel2.next = 2
        for i in range(8):
            yield clk.posedge
            
        yield myhdl.delay( int( tCK // 4 ))
        
        for j in range( 3 ):  
            Sel2.next= j         
            for i in range( 3 ):
                Sel1.next = i
                yield clk.posedge
                yield myhdl.delay(0) # need this one for a strange reason???
                print( Q )    
                assert Q == 1 + j * 3 + i
                yield myhdl.delay( int( tCK // 4 ))
            
        raise myhdl.StopSimulation

    
    return tbdut, genreset, genclk, stimulus


def test_tb_array_3():
    assert myhdl.conversion.verify( tb_array_3 ) == 0