python中怎样将十进制数转化为二进制

Posted 2023-03-16

#!/usr/bin/python# -*- coding:utf-8 -*-# @Time : 2018/6/19 10:20# @Author : # @File : Dec_To_Bin.py"""十进制转二进制""" # 定义一个十进制转二进制的函数def dec2bin(string_num): num = int(string_num) # 将传入的字符串数字转换成整型 mid = [] # 定义一个空列表 while True: # 循环，条件为真时执行 if num == 0: # 当输入值是0时，直接跳出循环 break num, rem = divmod(num, 2) # 调用函数divmod,得到商num，和余数rem mid.append(rem) # 将余数存入列表 return ''.join([str(x) for x in mid[::-1]]) # 返回结果，列表取反后拼接成字符串 if __name__ == '__main__': anum = raw_input(u'请输入要转换的数字：') print u'该数字转换为二进制后是：'.format(dec2bin(anum)) 参考技术A

用bin（）函数就可以直接转换

代码

输出结果：

0b1010

python怎样将16进制转化为2进制

#coding=gbk
var=input("请输入十六进制数：")
b=bin(int(var,16))
print(b[2:])

运行结果

详细请参考python自带int函数、bin函数用法

参考网址：https://docs.python.org/3/library/functions.html?highlight=int#bin

class int(x, base=10)

Return an integer object constructed from a number or string x, or return 0 if no arguments are given. If x is a number, return x.__int__(). For floating point numbers, this truncates towards zero.

If x is not a number or if base is given, then x must be a string, bytes, or bytearray instance representing an integer literal in radix base. Optionally, the literal can be preceded by + or - (with no space in between) and surrounded by whitespace. A base-n literal consists of the digits 0 to n-1, with a to z (or A to Z) having values 10 to 35. The default base is 10. The allowed values are 0 and 2–36. Base-2, -8, and -16 literals can be optionally prefixed with 0b/0B, 0o/0O, or 0x/0X, as with integer literals in code. Base 0 means to interpret exactly as a code literal, so that the actual base is 2, 8, 10, or 16, and so that int('010', 0) is not legal, while int('010') is, as well as int('010', 8).

The integer type is described in Numeric Types — int, float, complex.

Changed in version 3.4: If base is not an instance of int and the base object has a base.__index__ method, that method is called to obtain an integer for the base. Previous versions used base.__int__ instead of base.__index__.

Changed in version 3.6: Grouping digits with underscores as in code literals is allowed.

2.bin(x)

Convert an integer number to a binary string. The result is a valid Python expression. If x is not a Python int object, it has to define an __index__() method that returns an integer.

参考技术A x='123abc'
b=bin(int(x,16))[2:]
print(b)