Question

我的班级

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]

使用Mydb类

....
q = "SELECT file FROM t_pictures WHERE 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)

错误

TypeError: String or Unicode type required

Answer 1

def Onbutton_1(self,event):
    q = "SELECT file FROM t_pictures WHERE 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)

Answer 2

数据库未从该查询返回字符串。您需要找出它返回的对象类型。我的猜测是你收到了一个元组。在这种情况下，从元组中提取字符串并尝试将其放入Image小部件中。还要确保将wx.BITMAP_TYPE_ANY作为第二个参数传递给wx.Image，以使窗口小部件更加灵活。有关详细信息，请参阅http://www.wxpython.org/docs/api/wx.Image-class.html。

无法向BitmapButton python显示BLOB图片

2 个答案: