本篇文章為大家展示了怎么在Python中利用內(nèi)置函數(shù)對(duì)進(jìn)制進(jìn)行轉(zhuǎn)換，內(nèi)容簡明扼要并且容易理解，絕對(duì)能使你眼前一亮，通過這篇文章的詳細(xì)介紹希望你能有所收獲。
使用Python內(nèi)置函數(shù)：bin()、oct()、int()、hex()可實(shí)現(xiàn)進(jìn)制轉(zhuǎn)換。
先看Python官方文檔中對(duì)這幾個(gè)內(nèi)置函數(shù)的描述：
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(chǎn)' 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.
| ↓ | 2進(jìn)制 | 8進(jìn)制 | 10進(jìn)制 | 16進(jìn)制 |
| 2進(jìn)制 | - | bin(int(x, 8)) | bin(int(x, 10)) | bin(int(x, 16)) |
| 8進(jìn)制 | oct(int(x, 2)) | - | oct(int(x, 10)) | oct(int(x, 16)) |
| 10進(jìn)制 | int(x, 2) | int(x, 8) | - | int(x, 16) |
| 16進(jìn)制 | hex(int(x, 2)) | hex(int(x, 8)) | hex(int(x, 10)) | - |
bin()、oct()、hex()的返回值均為字符串，且分別帶有0b、0o、0x前綴。
Python進(jìn)制轉(zhuǎn)換（二進(jìn)制、十進(jìn)制和十六進(jìn)制）實(shí)例
重慶分公司
重慶分公司
#!/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)]
# bin2dec
# 二進(jìn)制 to 十進(jìn)制: int(str,n=10)
def bin2dec(string_num):
return str(int(string_num, 2))
# hex2dec
# 十六進(jìn)制 to 十進(jìn)制
def hex2dec(string_num):
return str(int(string_num.upper(), 16))
# dec2bin
# 十進(jìn)制 to 二進(jìn)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]])
# dec2hex
# 十進(jìn)制 to 八進(jìn)制: oct()
# 十進(jìn)制 to 十六進(jìn)制: hex()
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]])
# hex2tobin
# 十六進(jìn)制 to 二進(jìn)制: bin(int(str,16))
def hex2bin(string_num):
return dec2bin(hex2dec(string_num.upper()))
# bin2hex
# 二進(jìn)制 to 十六進(jìn)制: hex(int(str,2))
def bin2hex(string_num):
return dec2hex(bin2dec(string_num))以下代碼用于實(shí)現(xiàn)十進(jìn)制轉(zhuǎn)二進(jìn)制、八進(jìn)制、十六進(jìn)制：
# -*- coding: UTF-8 -*-
# Filename : test.py
# author by : www.jb51.net
# 獲取用戶輸入十進(jìn)制數(shù)
dec = int(input("輸入數(shù)字："))
print("十進(jìn)制數(shù)為：", dec)
print("轉(zhuǎn)換為二進(jìn)制為：", bin(dec))
print("轉(zhuǎn)換為八進(jìn)制為：", oct(dec))
print("轉(zhuǎn)換為十六進(jìn)制為：", hex(dec))執(zhí)行以上代碼輸出結(jié)果為：
python3 test.py
輸入數(shù)字：5
十進(jìn)制數(shù)為：5
轉(zhuǎn)換為二進(jìn)制為： 0b101
轉(zhuǎn)換為八進(jìn)制為： 0o5
轉(zhuǎn)換為十六進(jìn)制為： 0x5
python3 test.py
輸入數(shù)字：12
十進(jìn)制數(shù)為：12
轉(zhuǎn)換為二進(jìn)制為： 0b1100
轉(zhuǎn)換為八進(jìn)制為： 0o14
轉(zhuǎn)換為十六進(jìn)制為： 0xc
具體實(shí)現(xiàn)
十進(jìn)制到二進(jìn)制：
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])
十進(jìn)制到八進(jìn)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])
十進(jìn)制到十六進(jìn)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進(jìn)2、8、16制轉(zhuǎn)換源碼
def cn(x):
return x.decode('utf-8')
a=int(raw_input(cn('請(qǐng)輸入要轉(zhuǎn)換的數(shù)字:')))
b=int(raw_input(cn('請(qǐng)輸入要轉(zhuǎn)換的進(jìn)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
#本程序僅支持2,8,16進(jìn)制，若想支持更多進(jìn)制請(qǐng)自己動(dòng)腦該代碼吧！python 十進(jìn)制整數(shù)轉(zhuǎn)換為任意進(jìn)制（36以內(nèi)）
def baseN(num, b):
return ((num == 0) and "0") or (baseN(num // b, b).lstrip("0") + "0123456789abcdefghijklmnopqrstuvwxyz"[num % b])上述內(nèi)容就是怎么在Python中利用內(nèi)置函數(shù)對(duì)進(jìn)制進(jìn)行轉(zhuǎn)換，你們學(xué)到知識(shí)或技能了嗎？如果還想學(xué)到更多技能或者豐富自己的知識(shí)儲(chǔ)備，歡迎關(guān)注創(chuàng)新互聯(lián)成都網(wǎng)站設(shè)計(jì)公司行業(yè)資訊頻道。
另外有需要云服務(wù)器可以了解下創(chuàng)新互聯(lián)scvps.cn，海內(nèi)外云服務(wù)器15元起步，三天無理由+7*72小時(shí)售后在線，公司持有idc許可證，提供“云服務(wù)器、裸金屬服務(wù)器、高防服務(wù)器、香港服務(wù)器、美國服務(wù)器、虛擬主機(jī)、免備案服務(wù)器”等云主機(jī)租用服務(wù)以及企業(yè)上云的綜合解決方案，具有“安全穩(wěn)定、簡單易用、服務(wù)可用性高、性價(jià)比高”等特點(diǎn)與優(yōu)勢，專為企業(yè)上云打造定制，能夠滿足用戶豐富、多元化的應(yīng)用場景需求。
