Python3 os.fsync () method
Python3 OS file / directory methods
Outline
os.fsync () method to force the file descriptor fd of the file is written to the hard disk. In Unix, will call fsync () function; on Windows, call _commit () function.
If you are ready to operate a Python file object f, first f.flush (), then os.fsync (f.fileno ()), to ensure that all memory associated with f are written to the hard disk. Valid unix, Windows in.
Unix, is available on Windows.
grammar
fsync () method syntax is as follows:
os.fsync(fd)
parameter
fd - the file descriptor.
return value
This method has no return value.
Examples
The following example demonstrates the fsync () method of use:
#!/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 above program output is:
读取的字符串为 : This is test 关闭文件成功!!