Python script that deletes old files

deleteOldFiles.py

import os
import datetime
import win32wnet
from datetime import date

# Destination path
host = 'devfs02' # SMB server
share = 'K' # SMB share
username = 'tde' # SMB user
password = 'etech' # SMB user password
unc = ''.join(['\\\\', host]) # UNC path
win32wnet.WNetAddConnection2(0, None, unc, None, username, password) # Connect to destination share
today = date.today()
dir_to_search = unc + '\\' + share + '\\trace\\'

for dirpath, dirnames, filenames in os.walk(dir_to_search):
  for file in filenames:
    filename = os.path.join(dirpath, file)
    file_modified = datetime.datetime.fromtimestamp(os.path.getmtime(filename))
    # Delete files older than 6 months
    if datetime.datetime.now() - file_modified > datetime.timedelta(weeks=26):
      try:
        os.remove(filename)
        print "Deleted " + filename
      except OSError:
        pass
        print "Cannot delete " + filename