将单个位写入python中的文件 [英] write individual bits to a file in python

问题描述

python中是否有一种方法可以写入少于1个字节的数据 即使我写了以1位表示的数字0，文件大小也是1(8位)字节

is there a way in python to write less than 1 byte data even when I write the number 0 which represented in 1 bit the file size is 1(8 bits) byte

我尝试了struct模块

I tried the struct module

file.write(struct.pack('b',0))

数组模块

import array
data1=array.array('B')
x=bin(0)[2:]
data1.append(int(0,2))
f2=open('/root/x.txt','wb')
data1.tofile(f2)

推荐答案

不，您不能写少于一个字节的内容.字节是计算机可以处理的不可分割的内存量.硬件未配备来处理小于1个字节的数据单元(尽管字节的大小可能因机器而异).文件系统还以可能为4KB的块为单位处理数据，因此写入一位实际上会在磁盘上产生4KB的块.

No you cannot write less than a byte. A byte is an indivisble amount of memory the computer can handle. The hardware is not equipped to handle units of data <1 byte (though the size of a byte may differ from machine to machine). The file system also deals with data in units of blocks which may be 4KB, so writing one bit really results in a 4KB block on disk.

另请参见此问题的更一般版本:

See also the more general version of this question: It is possible to write less than 1 byte to a file

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