一.bytes和string區(qū)別

1.python bytes 也稱字節(jié)序列，并非字符。取值范圍 0 <= bytes <= 255，輸出的時(shí)候最前面會(huì)有字符b修飾；string 是python中字符串類型;

2.bytes主要是給在計(jì)算機(jī)看的，string主要是給人看的；

3.string經(jīng)過(guò)編碼encode，轉(zhuǎn)化成二進(jìn)制對(duì)象，給計(jì)算機(jī)識(shí)別；bytes經(jīng)過(guò)解碼decode，轉(zhuǎn)化成string，讓我們看，但是注意反編碼的編碼規(guī)則是有范圍,xc8就不是utf8識(shí)別的范圍；

if __name__ == '__main__': # 字節(jié)對(duì)象b b = b'shuopython.com' # 字符串對(duì)象s s = 'shuopython.com' print(b) print(type(b)) print(s) print(type(s))

輸出結(jié)果：

b’shuopython.com’<class ’bytes’>shuopython.com<class ’str’>

二.bytes轉(zhuǎn)string

string經(jīng)過(guò)編碼encode轉(zhuǎn)化成bytes

# !usr/bin/env python# -*- coding:utf-8 _*-'''@Author:何以解憂@Blog(個(gè)人博客地址): shuopython.com@WeChat Official Account(微信公眾號(hào))：猿說(shuō)python@Github:www.github.com @File:python_bytes_string.py@Time:2020/2/26 21:25 @Motto:不積跬步無(wú)以至千里，不積小流無(wú)以成江海，程序人生的精彩需要堅(jiān)持不懈地積累！'''if __name__ == '__main__': s = 'shuopython.com' # 將字符串轉(zhuǎn)換為字節(jié)對(duì)象 b2 = bytes(s, encoding=’utf8’) # 必須制定編碼格式 # print(b2) # 字符串encode將獲得一個(gè)bytes對(duì)象 b3 = str.encode(s) b4 = s.encode() print(b3) print(type(b3)) print(b4) print(type(b4))

輸出結(jié)果：

b’shuopython.com’<class ’bytes’>b’shuopython.com’<class ’bytes’>

三.string轉(zhuǎn)bytes

bytes經(jīng)過(guò)解碼decode轉(zhuǎn)化成string

if __name__ == '__main__': # 字節(jié)對(duì)象b b = b'shuopython.com' print(b) b = bytes('猿說(shuō)python', encoding=’utf8’) print(b) s2 = bytes.decode(b) s3 = b.decode() print(s2) print(s3)

輸出結(jié)果：

b’shuopython.com’b’xe7x8cxbfxe8xafxb4python’猿說(shuō)python猿說(shuō)python

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