sqlite3 - Cant display a BLOB picture to BitmapButton python -


my class

class mydb():     def __init__ (self):         self.conn = sqlite3.connect('c:\\lab\\pictures.db')      def queryf(self,q):         c = self.conn.cursor()         c.execute(q)         data = c.fetchone()         return data[0]

using mydb class

.... q = "select file t_pictures id = 1;" db = mydb() _data = db.queryf(q) start_image = wx.image(_data) start_image.rescale(150, 100) image = wx.bitmapfromimage(start_image) self.bitmap_button_1 = wx.bitmapbutton(self, wx.id_any,image)

the error

typeerror: string or unicode type required 

def onbutton_1(self,event):     q = "select file t_pictures id = 1;"     db = mydb()     _buffer = db.queryf(q)     stream = cstringio.stringio(_buffer)     image = wx.imagefromstream(stream)             _pic = wx.bitmapfromimage(image.rescale(150, 100))             self.bitmap_button_1 = wx.bitmapbutton(self, wx.bitmap_type_any,_pic)

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