无法base64.decode的`的输出中指定（）`到可变

Question

我想导入的基64编码的图形作为画布背景来使用。根据documentation，base64.decode需要2个参数：输入和输出。我不明白如何将base64.decode()的输出分配给变量background_image。这些是有问题的两行代码：

background_image = base64.decode(background_image.background_image, x.png) 
canvas.create_image(0, 0, image=ImageTk.PhotoImage(file=background_image), anchor=NW) 

这是我简化程序的版本。

#imported modules 
from tkinter import * 
from PIL import ImageTk, Image 
import base64 

#imported files 
import background_image # a .py file containing the base64 encoded graphic string 

'''...stuff''' 

background_image = base64.decode(background_image.background_image, x.png) 
canvas.create_image(0, 0, image=ImageTk.PhotoImage(file=background_image), anchor=NW) 

'''...more stuff''' 

Answer 1

阅读the documentation更仔细：

base64.decode(input, output) 

Decode the contents of the binary input file and write the resulting binary data to the output file. input and outputmust be file objects. input will be read until input.read() returns an empty bytes object.

如果有的话，你应该使用base64.b64decode()。

background_image = base64.b64decode(background_image.background_image)