Python os.writev() - 将指定缓冲区的内容写入指定的文件描述符

# Python program to explain os.writev() method
  
# import os module
import os
  
# File path
path = "./file2.txt"
  
# Create a file and get the
# file descriptor associated 
# with it using os.open() method
fd = os.open(path, os.O_CREAT | os.O_WRONLY)
  
  
# Bytes-like objects 
# the data to be written in the file
buffer1 = bytearray(b"GeeksForGeeks: ")
buffer2 = bytearray(b"A computer science portal ")
buffer3 = bytearray(b"for geeks")
  
# write the data contained in
# bytes-like objects
# to the file descriptor fd
# using os.writev() method
numBytes = os.writev(fd, [buffer1, buffer2, buffer3])
  
# print the content of file
with open(path) as f:
    print(f.read())
  
# Print the number of bytes actually written
print("Total Number of bytes actually written:", numBytes)

GeeksForGeeks: A computer science portal for geeks
Total Number of bytes actually written: 50