你可以请帮助我解决与代码的问题，它不显示在从mysql数据库检索的临时目录中保存的treeview中的图像。

def get_imgs():
                global td
                global img_ref
                img_ref = []
                td = tempfile.mkdtemp()
                cur.execute("SELECT * FROM Candidates")
                r = cur.fetchall()
                for i in r:
                    b_dt = i[1]
                    img_dt = Image.open(io.BytesIO(b_dt))
                    img_dt.save(td+'/'+str(i[0])+'.png')
                    img_ref.append(img_dt)

            def insert_val():
                get_imgs()
                count=0
                cur.execute("SELECT * FROM Candidates")
                data = cur.fetchall()
                for record in data:
                     path = td+'/'+str(record[0])+'.png'
                    img = ImageTk.PhotoImage(Image.open(path))
                    can_table.insert(parent='', index='end', iid=count, open=True, text='',  image=img, values=(record[0]))
                    count += 1

treestyle = ttk.Style()
            treestyle.theme_use('default')
            treestyle.configure("Treeview", background=bg_color, foreground=text_color, fieldbackground=bg_color,
                                borderwidth=0, font=('Koulen', 26), rowheight=80)
            treestyle.configure('Treeview.Heading', font=('Koulen', 22), foreground='white',
                                fieldbackground=bg_color, background=bg_color)
            treestyle.map('Treeview', background=[('selected', bg_color)],
                          foreground=[('selected', selected_color)])

            can_table = ttk.Treeview(fr, selectmode='browse', height=5)
            can_table.pack(expand=True, fill='both')

            can_table['columns'] = ("StudentName")
            can_table['show'] = ('tree headings')

            can_table.column("#0", anchor=CENTER, width=200)
            can_table.column("StudentName", anchor=CENTER, width=400)

            can_table.heading('#0', text='#')
            can_table.heading('StudentName', text='Student Name')

            can_table.tag_configure('oddrow', background='#161717')
            can_table.tag_configure('oddrow', background='#393C3C')

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我基本上尝试直接将blob数据转换为图像并插入到treeview中，但这也没有给予好的结果！
图像用于显示，如果它是一个单一的行，但不是多个图像，现在不会发生！
我主要使用自定义tkinter为gui和外观..