Python os.fdatasync () method
Python OS file / directory methods
Outline
os.fdatasync () method is used to force the file is written to disk, the file specified by the file descriptor fd, but does not enforce the update file status information. If you need to refresh the buffer can use this method.
Available on Unix.
grammar
fdatasync () method syntax is as follows:
os.fdatasync(fd);
parameter
fd - file descriptor
return value
This method has no return value.
Examples
The following example demonstrates fdatasync () method of use:
#!/usr/bin/python # -*- coding: UTF-8 -*- import os, sys # 打开文件 "/tmp/foo.txt" fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT ) # 写入字符串 os.write(fd, "This is test") # 使用 fdatasync() 方法 os.fdatasync(fd) # 读取文件 os.lseek(fd, 0, 0) str = os.read(fd, 100) print "读取的字符是 : ", str # 关闭文件 os.close( fd ) print "关闭文件成功!!"
The above program output is:
读取的字符是 : This is test 关闭文件成功!!