bas64解码保存图片后无法显示——知乎爬虫登录验证码识别

背景：最近在爬知乎，先搞一个自动登录，我是用的是可视化的webdriver来模拟登陆，因为知乎有反爬手段，使用代码输入账号密码几乎百分百出验证码，验证码是一个中文的一个英文，英文较容易，如果出了中文大不了重新登陆

此验证码是一个base64格式的图片，所以就没有采取截图的方式，直接拿到验证码的base64编码进行保存，然后识别接着输入就ok了，这么一想很容易，但是出了一个小插曲
验证码拿到以后使用base64.b64decode()后竟然是无法查看的图片也无法识别，这怎么回事
通过几个小时的摸索终于找到问题

1、发现解码失败后很奇怪，代码没问题呀，大家都这么写为什么这个不行，但是这个放到网上在线base64转图片就可以看到图，蛤这么奇怪
2、那是什么问题，我找了别人的一段base64编码的图片用我的代码，发现居然可以，代码没问题了是我的那段base64编码有问题，但是在线解码工具又可以成功……
3、此时我发现我的base64编码是一行很长就不粘了，我发现这段里面有一个‘%’字符，诶很奇怪，就去查看了网上的base64编码表发现根本没有‘%’，所以这就不是纯正的base64编码，那这是什么，想到了url编码，正好发现那段base64中频繁的出现“%0A”，一查这都是url编码中的换行符，终于发现问题了，所以就要先进行url解码再进行base64解码就可以完成总体的解码，下面粘上代码：

imgBase64 = "data:image/jpg;base64,R0lGODdhlgA8AIcAAP7+/gICAujo6BcXF9fX11ZWVmdnZyYmJsjIyJaWljY2NkdHR/Pz83d3d4iI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"

imgBase64 = imgBase64.split("base64,")[1]
imgBase64 = parse.unquote(imgBase64)
print(imgBase64)
if os.path.exists("Code.jpg"):
    os.remove("Code.jpg")
    data = base64.b64decode(imgBase64)
    with open("Code.jpg", 'wb') as img:
        img.write(data)
        img.close()
else:
    data = base64.b64decode(imgBase64)
    with open("Code.jpg", 'wb') as img:
        img.write(data)
        img.close()

既然搞定了，哈哈知乎我来了