Python base64 string to PyPng without saving file

Question

How do you do this without saving to disk and then opening 'out.png' ?

    r = requests.get(url)
    mine,encoded =  r.json()[0]['data'].split(',') #if it is segmentation
    decoded = base64.decodestring(encoded)

    if mine == 'data:image/png;base64':
        #TODO do this from memory
        g = open("out.png", "w")
        g.write(decoded)
        g.close()            

        r = png.Reader('out.png')
        print r.read()

Answer 1

使用bytes关键字

r = png.Reader(bytes=decoded)

Answer 2

base53.decodestring()返回二进制数据的字符串，并且根据此页面 png.Reader()可以将字符串作为输入，因此只需要将两者链接在一起即可。