Python mouse EVT_COMMAND_LEFT_CLICK, EVT_LEFT_DOWN

[SMALLp]

Hy!
I'm not able to tu bind mouse click event. Code:

class MouseClass(wx.Panel):
        def __init__(self, parent, id):

                wx.Panel.__init__(self, parent, id, size=(500, 300))
                self.SetBackgroundColour("WHITE")

                sizer = wx.BoxSizer(wx.VERTICAL)

                testPanel.SetBackgroundColour("BLACK")
                self.Bind(wx.EVT_COMMAND_LEFT_CLICK, self.open, 
id=testPanel.GetId())
                sizer.Add(testPanel, 0, wx.EXPAND)
                self.SetSizerAndFir(sizer)

        def open(self, event):
                print "yea"

U  tried EVT_LEFT_DOWN as I found on goofle and couldnt get it to work. 
Please help.
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