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：

std_base= "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
mg_base=  "tuvwxTUlmnopqrs7YZabcdefghij8yz0123456VWXkABCDEFGHIJKLMNOPQRS9+/="

en_trantab = str.maketrans(std_base, mg_base)  # 制作翻译表
de_trantab=str.maketrans(mg_base,std_base)
import base64

s='hello world'
stden=base64.b64encode(s.encode()).decode()
print('标准base64编码：'+stden)
enstr=stden.translate(en_trantab)
print('修改base64编码：'+enstr)

t=enstr.translate(de_trantab).encode()
mgs=base64.b64decode(t).decode()
print(mgs)

输出：

标准base64编码：aGVsbG8gd29ybGQ=
修改base64编码：iUdCjUS1yM9IjUY=
hello world