1、可以在mode參數(shù)中添加'b'字符。所有適合文件對象的相同方法。然而，每種方法都希望并返回一個bytes對象。
>>> with open(`dog_breeds.txt`, 'rb') as reader:
>>> print(reader.readline())
b'Pug\n'
2、當(dāng)打開文件并單獨閱讀這些字節(jié)時，可以看到它確實是一個png文件:
>>> 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'
知識點擴展：
讀取文件的字節(jié)流數(shù)據(jù)，將其轉(zhuǎn)換為十六進制數(shù)據(jù)
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
import base64
def 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()
將十六進制文件轉(zhuǎn)化為字節(jié)流文件寫入
import struct
a = open("str.txt","r")#十六進制數(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)處理文件實例講解的詳細內(nèi)容，更多關(guān)于python使用字節(jié)處理文件的資料請關(guān)注腳本之家其它相關(guān)文章！
