def hex2char(data):
# binascii.a2b_hex(hexstr)
output = binascii.unhexlify(data)
print(output)
def char2hex(data):
data = b'data'
# binascii.b2a_hex(data)
output = binascii.hexlify(data)
print(output)
这两个函数与上述代码有着相同的功能,代码中有两行注释,表明binascii.a2b_hex(hexstr)和binascii.unhexlify(hexstr)在功能上是等价的,另一个同样
这里十六进制转字符串直接调用就可以了,但是当直接使用output = binascii.hexlify(data)时则报错了,对此函数munuals的说法是:
Return the hexadecimal representation of the binary data. Every byte of data is converted into the corresponding 2-digit hex representation. The resulting string is therefore twice as long as the length of data
因此对传入的参数必须申明是byte of data,刚开始没有想到,不知怎么处理,后来想到b'string data'类似于r'string data'(原始字符串,在使用windows路径时,r'..\path'可以不需要对反斜线转义),于是有了:
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]])
完整代码见http://www.iyunv.com/zhangpengshou/archive/2012/03/12/2392068.html
最后再给出Ascii码和整数转换的函数:
chr()函数以一个Ascii码作为参数,返回对应的整数
ord()函数则刚好与chr()相反,返回对应Ascii码,如果参数超过Ascii码表示范围则返回对应的unicode值