Alert if a file is not in a particular folder.

import os

import ctypes

import sys

​

def alert(arg):

    sys.stderr.write("%d%d%d" % (arg, arg, arg))

​

path=r'C:\Users\shinchan\Desktop\folder'               #Provide the path of the folder 

file1='abc.exe'                                        #Provide the file name

class disable_file_system_redirection:

    _disable = ctypes.windll.kernel32.Wow64DisableWow64FsRedirection

    _revert = ctypes.windll.kernel32.Wow64RevertWow64FsRedirection

    def __enter__(self):

        self.old_value = ctypes.c_long()

        self.success = self._disable(ctypes.byref(self.old_value))

    def __exit__(self, type, value, traceback):

        if self.success:

            self._revert(self.old_value)

with disable_file_system_redirection(): 

​

    for File in os.listdir(path):

        if File == file1:

            b=0

            break

        else:

            b=1

​

if b==0:

    print "file  "+file1+"  exists"

    alert(0)

else:

    print "file  "+file1+"  does not exists"

    alert(1)

​