在Python中读取二进制文件中的整数

Question

I have the following snippet of C code:

#include <stdio.h>
void main(){
  int a = 1308901095;
  FILE *fp;
  fp = fopen("file", "wb");
  fwrite(&a, sizeof(int), 1, fp);
  fclose(fp);
  printf("Done\n");
}

This will write the "a" integer in file "file", in binary form.

How I can read this number in Python?

Answer 1

Try following.

from struct import *
f = open('file', 'rb')
print unpack('<i', f.read(4))[0]
f.close()

note that using '<' about your machine is little endian or not.