Python3 os.fsync() Method
Python3 OS File/Directory Methods
Overview
The os.fsync() method forces the file with file descriptor fd to be written to the hard disk. On Unix, the fsync() function is called; on Windows, the _commit() function is called.
If you are going to operate on a Python file object f, first call f.flush(), then os.fsync(f.fileno()), to ensure that all memory related to f is written to the hard disk. This is effective on Unix and Windows.
Available on Unix and Windows.
Syntax
fsync()The method syntax is as follows:
os.fsync(fd)
Parameters
fd-- The file descriptor.
Return Value
This method has no return value.
Example
The following example demonstrates the use of the fsync() method:
#!/usr/bin/python3
import os, sys
# 打开文件
fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT )
# 写入字符串
os.write(fd, "This is test")
# 使用 fsync() 方法.
os.fsync(fd)
# 读取内容
os.lseek(fd, 0, 0)
str = os.read(fd, 100)
print ("读取的字符串为 : ", str)
# 关闭文件
os.close( fd)
print ("关闭文件成功!!")
The output of the above program is:
读取的字符串为 : This is test 关闭文件成功!!Other Extensions