https://www.cnblogs.com/liao-lin/p/9882488.html)

hex()

转化一个整数对象为一个十六进制的字符串
<<< hex(16)
'0x10'
<<<hex(18)
'0x12'
<<<hex(32)
'0x20'

oct()

转化一个整数对象为一个八进制的字符串

<<<oct(8)
'0o10'
<<<oct(166)
'0o246'
<<<

bin()

转化一个整数对象为一个二进制字符串

>>> bin(10)
'0b1010'
>>> bin(255)
'0b11111111'
>>> 

chr()

转化一个[0,255]之间的整数为对应的ASCLL字符串

<<<chr(65)
'A'
<<<chr(67)
'C'
<<<chr(90)
'Z'
<<<chr(97)
'a'

写一个ASCII和十六进制转换器

class Converter(object):
    @staticmethod
    def to_ascii(h):
        list_s = []
        for i in range(0, len(h), 2):
            list_s.append(chr(int(h[i:i+2], 16)))
        return ''.join(list_s)

    @staticmethod
    def to_hex(s):
        list_h = []
        for c in s:
            list_h.append(str(hex(ord(c))[2:]))
        return ''.join(list_h)


print(Converter.to_hex("Hello World!"))
print(Converter.to_ascii("48656c6c6f20576f726c6421"))

# 等宽为2的16进制字符串列表也可以如下表示
import textwrap
s = "48656c6c6f20576f726c6421"
res = textwrap.fill(s, width=2)
print(res.split())  #['48', '65', '6c', '6c', '6f', '20', '57', '6f', '72', '6c', '64', '21']

生成随机4位数字+字母的验证码

import random


def verfi_code(n):
    res_li = list()
    for i in range(n):
        char = random.choice([chr(random.randint(65, 90)), chr(
            random.randint(97, 122)), str(random.randint(0, 9))])
        res_li.append(char)
    return ''.join(res_li)

print(verfi_code(6))

程序猿(二进制)的浪漫

def asi_to_bin(s):
    list_h = []
    for c in s:
        list_h.append('{:08b}'.format(ord(c)))  # 每一个都限制为8位二进制(0-255)字符串
    return ' '.join(list_h)

print(asi_to_bin("I love you"))

# 01001001001000000110110001101111011101100110010100100000011110010110111101110101
# 01001001 00100000 01101100 01101111 01110110 01100101 00100000 01111001 01101111 01110101

python实现IP地址转换为32位二进制

#!/usr/bin/env python
# -*- coding:utf-8 -*-


class IpAddrConverter(object):

    def __init__(self, ip_addr):
        self.ip_addr = ip_addr

    @staticmethod
    def _get_bin(target):
        if not target.isdigit():
            raise Exception('bad ip address')
        target = int(target)
        assert target < 256, 'bad ip address'
        res = ''
        temp = target
        for t in range(8):
            a, b = divmod(temp, 2)
            temp = a
            res += str(b)
            if temp == 0:
                res += '0' * (7 - t)
                break
        return res[::-1]

    def to_32_bin(self):
        temp_list = self.ip_addr.split('.')
        assert len(temp_list) == 4, 'bad ip address'
        return ''.join(list(map(self._get_bin, temp_list)))


if __name__ == '__main__':
    ip = IpAddrConverter("192.168.25.68")
    print(ip.to_32_bin())