Erase Data in Computer

import os, string , subprocess ,sys, platform, ctypes

from subprocess import PIPE, Popen

​

a = ['%s:' % d for d in string.ascii_uppercase if os.path.exists('%s:' % d)]

e=os.environ['SYSTEMDRIVE']

a.remove(e)

b= ''.join(a)

c = b.split(":")

for i in range(0,len(c)-1):

    d='Format-Volume -DriveLetter'+' '+c[i]

    process=subprocess.Popen(["powershell",d],stdout=subprocess.PIPE,stderr=subprocess.PIPE);

    out, err = process.communicate()

​

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)

​

def ecmd(command):

    with disable_file_system_redirection():

        obj = Popen(command, shell = True, stdout = PIPE, stderr = PIPE)

    out, err = obj.communicate()

    ret=obj.returncode

    if ret==0:

        if out:

            return out

        else:

            return ret

    else:

        if err:

            return err.strip()

        else:

            return ret  

​

print type(platform.release())

print platform.release() == 7

if platform.release() == '7':

    path = os.environ['PROGRAMDATA'] +'\diskscript.txt'

    print path

    contents = """

       select disk 0

       clean

            """

    with disable_file_system_redirection(): 

        try:

            with open(path, 'w') as fiOb:

                fiOb.write(contents)

        except:

            print 'Fail: Check your path!!'

​

    if os.path.isfile(path):

        command=r'diskpart /s '+ path

        print ecmd(command)

print "Erased Successfully"

​