#Import os Library

import os

​

# open file

fd = os.open("test.txt", os.O_RDWR)

​

#Print original size of file (in bytes)

print("File size (in bytes):", os.stat(fd).st_size)

​

length = 10

​

#Truncate file to 10 bytes

os.ftruncate(fd, length)

​

#Print new size of file (in bytes)

print("File size (in bytes):", os.stat(fd).st_size)

​

#close file

os.close(fd)

​