binascii.Error: Invalid base64encoded string: number of data characters

 解决办法：

import base64

d = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMgAAADICAYAAACtWK6eAAAAA".     # 模拟数据

# dd = d.split(",")[1]       # base64解成图片保存本地，需要吧data：base64协议给去掉
ret = base64.b64decode(d, altchars=None, validate=False)
print(ret)