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.
oct(x)
Convert an integer number to an octal 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.
int([number | string[, base]])
Convert a number or string to an integer. If no arguments are given, return 0. If a number is given, return number.__int__(). Conversion of floating point numbers to integers truncates towards zero. A string must be a base-radix integer literal optionally preceded by ‘+' or ‘-‘ (with no space in between) and optionally 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).
hex(x)
Convert an integer number to a hexadecimal 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.
#!/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)]
def dec2bin(num):
l = []
if num < 0:
return '-' + dec2bin(abs(num))
while True:
num, remainder = divmod(num, 2)
l.append(str(remainder))
if num == 0:
return ''.join(l[::-1])
十进制到八进制：
def dec2oct(num):
l = []
if num < 0:
return '-' + dec2oct(abs(num))
while True:
num, remainder = divmod(num, 8)
l.append(str(remainder))
if num == 0:
return ''.join(l[::-1])
十进制到十六进制：
base = [str(x) for x in range(10)] + [ chr(x) for x in range(ord('A'),ord('A')+6)]
def dec2hex(num):
l = []
if num < 0:
return '-' + dec2hex(abs(num))
while True:
num,rem = divmod(num, 16)
l.append(base[rem])
if num == 0:
return ''.join(l[::-1])
python进2、8、16制转换源码
def cn(x):
return x.decode('utf-8')
a=int(raw_input(cn('请输入要转换的数字:')))
b=int(raw_input(cn('请输入要转换的进制:')))
def x(n,k):
if k==16:
d=n
s=""
while d!=0:
d,f=divmod(d,k)
if f==10:
f='a'
if f==11:
f='b'
if f==12:
f='c'
if f==13:
f='d'
if f==14:
f='e'
if f==15:
f='f'
s=str(f)+s
return s
elif k==2 or k==8:
d=n
s=""
while d!=0:
d,f=divmod(d,k)
s=str(f)+s
return s
c=x(a,b)
print c
#本程序仅支持2,8,16进制，若想支持更多进制请自己动脑该代码吧！
python 十进制整数转换为任意进制（36以内）
