1、可以在mode參數(shù)中添加'b'字符。所有適合文件對(duì)象的相同方法。然而，每種方法都希望并返回一個(gè)bytes對(duì)象。
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>>> with open(`dog_breeds.txt`, 'rb') as reader:>>> print(reader.readline())b'Pug\n' |
2、當(dāng)打開(kāi)文件并單獨(dú)閱讀這些字節(jié)時(shí)，可以看到它確實(shí)是一個(gè)png文件:
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>>> with open('jack_russell.png', 'rb') as byte_reader:>>> print(byte_reader.read(1))>>> print(byte_reader.read(3))>>> print(byte_reader.read(2))>>> print(byte_reader.read(1))>>> print(byte_reader.read(1))b'\x89'b'PNG'b'\r\n'b'\x1a'b'\n' |
知識(shí)點(diǎn)擴(kuò)展：
讀取文件的字節(jié)流數(shù)據(jù)，將其轉(zhuǎn)換為十六進(jìn)制數(shù)據(jù)
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def read_file(): with open('./flag.zip','rb') as file_byte: file_hex = file_byte.read().hex() print(file_hex) write_file(file_hex)def write_file(file_hex): with open('new.txt','w') as new_file: new_file.write(file_hex)if __name__ == '__main__': read_file() |
讀取文件的字節(jié)流數(shù)據(jù)，將其編碼為base64并輸出
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import base64def read_file(): with open('./flag.zip','rb') as file_byte: file_base64 = base64.b64encode(file_byte.read()) print(file_base64)if __name__ == '__main__': read_file() |
將十六進(jìn)制文件轉(zhuǎn)化為字節(jié)流文件寫(xiě)入
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import structa = open("str.txt","r")#十六進(jìn)制數(shù)據(jù)文件lines = a.read()res = [lines[i:i+2] for i in range(0,len(lines),2)]with open("xxx.xxx","wb") as f: for i in res: s = struct.pack('B',int(i,16)) f.write(s) |
以上就是python用字節(jié)處理文件實(shí)例講解的詳細(xì)內(nèi)容，更多關(guān)于python使用字節(jié)處理文件的資料請(qǐng)關(guān)注服務(wù)器之家其它相關(guān)文章！
原文鏈接：https://www.py.cn/jishu/jichu/29107.html
