base64模块 简单了解

base64，字符串文本编码解码，方便数据进行传输

 import base64
 '''编码解码'''
 st = 'ni hao'.encode('utf8')
 result = base64.b64encode(st)
 print(result)   # b'bmkgaGFv'

 result = base64.b64decode(result)
 print(result)   # b'ni hao'
 print(result.decode('utf8'))    # ni hao

 url = 'https://www.baidu.com'.encode('utf8')
 result = base64.urlsafe_b64encode(url)
 print(result)   # b'aHR0cHM6Ly93d3cuYmFpZHUuY29t'

 result = base64.urlsafe_b64decode(result)
 print(result.decode('utf8'))    # https://www.baidu.com