Python3 os.write () method
Python3 OS file / directory methods
Outline
os.write () method is used to write strings to the file descriptor fd in. returns the actual length of the string is written.
Effective on Unix.
grammar
write () method syntax is as follows:
os.write(fd, str)
parameter
fd - file descriptor.
str - the string written.
return value
This method returns the actual number of bits written.
Examples
The following example demonstrates the write () method of use:
#!/usr/bin/python3
import os, sys
# 打开文件
fd = os.open("f1.txt",os.O_RDWR|os.O_CREAT)
# 写入字符串
str = "This is w3big.com site"
ret = os.write(fd,bytes(str, 'UTF-8'))
# 输入返回值
print ("写入的位数为: ")
print (ret)
print ("写入成功")
# 关闭文件
os.close(fd)
print ("关闭文件成功!!")
The above program output is:
写入的位数为: 23 写入成功 关闭文件成功!!