``` #!/usr/bin/python # -*- coding=UTF-8 -*- # 十进制转二进制 def binary(n): result = '' if n: result = binary(n // 2) #递归获取除于2的数，再取模 return result + str(n % 2) #字符串类型用+号是相连 else: return result # 十进制转二进制方法二 # 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)] def dec2bin(string_num): num = int(string_num) mid = [] while True: if num == 0: break num,rem = divmod(num, 2) # num除于2的整数和余数 mid.append(base[rem]) return ''.join([str(x) for x in mid[::-1]]) # 十进制 to 十六进制(八进制) 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]]) # 二进制 to 十进制 def bin2dec(string_num): return str(int(string_num, 2)) # 二进制 to 十六进制 def bin2hex(string_num): return dec2hex(bin2dec(string_num)) # 十六进制 to 十进制 def hex2dec(string_num): return str(int(string_num.upper(), 16)) # 十六进制 to 二进制 def hex2bin(string_num): return dec2bin(hex2dec(string_num.upper())) ```