我已使用DBite for SQLite作为Blob将图像保存在SQLite数据库中。我想从数据库中打开Blob数据,然后在窗口中绘制图像。
为此,我正在做这样的事情:
import sqlite3
from PIL import Image, ImageTk
sql_fetch_blob_query = "SELECT * from credentials where id = ?"
c.execute(sql_fetch_blob_query, (id,))
record = c.fetchall()
for row in record:
print("Id = ", row[0], "Name = ", row[1])
photo = row[4] # image saved in the 5th column of database
# drawing image to top window
render = ImageTk.PhotoImage(photo)
img = Label(image=render)
img.image = render
img.place(x=0, y=0)
但是它实际上不起作用,并且在窗口中什么也不显示。请帮助我从SQLite数据库将图像绘制到窗口。
错误是终端:
Exception in Tkinter callback
Traceback (most recent call last):
File "/usr/lib/python3.7/tkinter/__init__.py", line 1705, in __call__
return self.func(*args)
File "master.py", line 67, in login
self.drawWin()
File "master.py", line 102, in drawWin
self.drawImage(top)
File "master.py", line 161, in drawImage
render = ImageTk.PhotoImage(self.photo)
File "/usr/lib/python3/dist-packages/PIL/ImageTk.py", line 114, in __init__
mode = Image.getmodebase(mode)
File "/usr/lib/python3/dist-packages/PIL/Image.py", line 326, in getmodebase
return ImageMode.getmode(mode).basemode
File "/usr/lib/python3/dist-packages/PIL/ImageMode.py", line 64, in getmode
return _modes[mode]
KeyError: b'\xff\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x00\x00\x01\x00\x01\x00\x00\
此KeyError持续数百行。
谢谢!
您需要在图像数据上使用io.BytesIO()
和Image.open()
:
import sqlite3
from PIL import Image, ImageTk
import io
sql_fetch_blob_query = "SELECT * from credentials where id = ?"
c.execute(sql_fetch_blob_query, (id,))
record = c.fetchall()
for row in record:
print("Id = ", row[0], "Name = ", row[1])
photo = row[4] # image saved in the 5th column of database
# convert the image data to file object
fp = io.BytesIO(photo)
image = Image.open(fp)
# drawing image to top window
render = ImageTk.PhotoImage(image)
img = Label(image=render)
img.image = render
img.place(x=0, y=0)