Python 进制互相转换（二进制、十进制和十六进制）

Python代码

 #!/usr/bin/env python
# -*- coding: utf-8 -*-
 # 2/10/16 base trans. wrote by srcdog on 20th, April, 2009
# ld elements in base 2, 10, 16.

import os,sys

# global definition
 # base = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F]
base = [str(x) for x in range(10)] + [ chr(x) for x in range(ord('A'),ord('A')+6)]

# bin2dec
 # 二进制 to 十进制: int(str,n=10)
def bin2dec(string_num):
     return str(int(string_num, 2))

 # hex2dec
# 十六进制 to 十进制
 def hex2dec(string_num):
    return str(int(string_num.upper(), 16))

# dec2bin
 # 十进制 to 二进制: bin()
def dec2bin(string_num):
     num = int(string_num)
    mid = []
     while True:
        if num == 0: break
         num,rem = divmod(num, 2)
        mid.append(base[rem])

    return ''.join([str(x) for x in mid[::-1]])

# dec2hex
 # 十进制 to 八进制: oct()
# 十进制 to 十六进制: hex()
 def dec2hex(string_num):
    num = int(string_num)
     mid = []
    while True:
         if num == 0: break
        num,rem = divmod(num, 16)
         mid.append(base[rem])

     return ''.join([str(x) for x in mid[::-1]])

 # hex2tobin
# 十六进制 to 二进制: bin(int(str,16))
 def hex2bin(string_num):
    return dec2bin(hex2dec(string_num.upper()))

# bin2hex
 # 二进制 to 十六进制: hex(int(str,2))
def bin2hex(string_num):
     return dec2hex(bin2dec(string_num))