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# Python os.fdatasync() Method

## Description:

This method forces write of file with filedescriptor fd to disk. This does not force update of metadata.

If you want to flush your buffer then you can use this method.

## Syntax:

    os.fdatasync(fd);

## Parameters:

Here is the detail of parameters:

- fd: This is the file descriptor for which data to be written.

## Example:

    #!/usr/bin/python

    import os, sys

    # Open a file
    fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT )

    # Write one string
    os.write(fd, "This is test")

    # Now you can use fdatasync() method.
    # Infact here you would not be able to see its effect.
    os.fdatasync(fd)

    # Now read this file from the beginning.
    os.lseek(fd, 0, 0)
    str = os.read(fd, 100)
    print "Read String is : ", str

    # Close opened file
    os.close( fd )

    print "Closed the file successfully!!"

This would produce following result:

    Read String is :  This is test
    Closed the file successfully!!

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