Here is a code snippet that I wrote recently for IronPython, correcting some registry information that I put by mistake in our image that is used for cloning client PC’s. I’m sure PowerShell script would be even shorter and cleaner, but I had to come with some working code in a hurry.

# -*- coding: cp1250 -*-
# odbc_patch.py -- patching my shallowness
# AlesK.

__about__= "IronPython script // odbc_patch2.py by AlesK"

from Microsoft.Win32 import Registry

# -----------------------------------------------
# How to enumerate a node from ODBC.INI.
# Print System DSN names with SERVER key value if present
# (SERVER key is mandatory for MS ODBC for Oracle, MySQL ODBC,
# etc., but not for Oracle supplied driver!
# 
# For complete reference to Regirstry class refer to:
# msdn.microsoft.com/en-us/library/microsoft.win32.registry.aspx
# You can use:
# Registry.ClassesRoot|CurrentConfig|CurrentUser|
#          LocalMachine|PerformanceData|Users
# ------------------------------------------------
system_dsn = Registry.LocalMachine.OpenSubKey('Software\\ODBC\\ODBC.INI')

for dsn in system_dsn.GetSubKeyNames():
    dsn_key = system_dsn.OpenSubKey(dsn)
    server = dsn_key.GetValue('SERVER')
    # print only those DSN's that were created with MS ODBC)
    # and thus have SERVER defined
    if server is not None:
        print("DSN=" + dsn + " SERVER=" + str(server))

# ------------------------------------------------------
# How to read and change value in registry.
# Registry.GetValue
# Registry.SetValue
#
# The plot: by mistake I added MS at the end of SERVER variable
# for DSN's that are using MS ODBC driver. Instead of
# SERVER = ORAXMS I really want SERVER = ORAX, striping off MS.
# Candidates in my case are: ORAXMS, ORAYMS, ORAZMS.
# ------------------------------------------------------

odbc_dsn = ['ORAXMS','ORAYMS','ORAZMS']
odbc_node = "HKEY_LOCAL_MACHINE\\Software\\ODBC\\ODBC.INI"
odbc_key  = "SERVER"

for dsn in odbc_dsn:
    value = ''
    value = Registry.GetValue(odbc_node + '\\' + dsn, odbc_key, value)
    if value in odbc_dsn:
        Registry.SetValue(odbc_node + '\\' + dsn, odbc_key, dsn.strip('MS'))
        print("ODBC.INI: patched " + dsn + " SERVER=" + dsn +
              " to SERVER=" + dsn.strip('MS'))
    else:
        print("ODBC.INI: " + dsn + " - nothing to patch.")

Sample output:

C:\Scripts\IronPython\Registry>ipy odbc_patch2.py
DSN=ORAXMS SERVER=ORAXMS
DSN=ORAYMS SERVER=ORAYMS
DSN=ORAZMS SERVER=ORAZMS
DSN=ORA6MS SERVER=ORAT
ODBC.INI: patched ORAXMS SERVER=ORAXMS to SERVER=ORAX
ODBC.INI: patched ORAYMS SERVER=ORAYMS to SERVER=ORAY
ODBC.INI: patched ORAZMS SERVER=ORAZMS to SERVER=ORAZ


In addition to PowerShell Wake-On-LAN script example I found example that works with python 3.x in ActiveState Code recipes collection:

#!/usr/bin/env python
 # wol.py
 # 
 # This module is from ActiveState Code Recipes:
 # http://code.activestate.com/recipes/358449-wake-on-lan/
 # and patched for Python 3 with:
 # http://code.activestate.com/recipes/577609-wake-on-lan-for-python-3/
 #
 # Example:
 # import wol
 # wol.wake_on_lan('70:F3:95:15:00:B5')
 #
import socket
import struct
 
def wake_on_lan(macaddress):
    """ Switches on remote computers using WOL. """
    
    # Check macaddress format and try to compensate
    if len(macaddress) == 12:
        pass
    elif len(macaddress) == 12 + 5:
        sep = macaddress[2]
        macaddress = macaddress.replace(sep,'')
    else:
        raise ValueError('Incorrect MAC address format')
        
        
    # Pad the synchronization stream
    data = b'FFFFFFFFFFFF' + (macaddress * 20).encode()
    send_data = b''
    
    # Split up the hex values in pack
    for i in range(0, len(data), 2):
        send_data += struct.pack('B', int(data[i: i + 2], 16))
    
    # Broadcast it to the LAN
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
    sock.sendto(send_data, ('255.255.255.255',7))