python3 base64

import base64

s=‘hello world‘
bytes_by_s=s.encode() #将字符串编码-->字节码，
b64_encode_bytes=base64.b64encode(bytes_by_s) #base64编码
print(b64_encode_bytes)


b64_decode_bytes=base64.b64decode(b64_encode_bytes) #base64解码
print(b64_decode_bytes)
s_by_bytes=b64_decode_bytes.decode() #字节码解码-->字符串
print(s_by_bytes)

输出：

b‘aGVsbG8gd29ybGQ=‘
b‘hello world‘
hello world

?

base64更改编码表：

mg_base=  "tuvwxTUlmnopqrs7YZabcdefghij8yz0123456VWXkABCDEFGHIJKLMNOPQRS9+/="

std_base= "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="

trantab = str.maketrans(std_base,mg_base)  # 制作翻译表

import base64

s=‘hello world‘
bytes_by_s=s.encode()
b64_encode_bytes=base64.b64encode(bytes_by_s)
print(b64_encode_bytes)

mgs=b64_encode_bytes.decode().translate(trantab)
print(mgs)


输出：

b‘aGVsbG8gd29ybGQ=‘iUdCjUS1yM9IjUY=