def confirm(prompt=None, resp=False):
 
 if prompt is None:
  prompt = 'Confirm'

 if resp:
  prompt = '%s [%s]|%s: ' % (prompt, 'y', 'n')
 else:
  prompt = '%s [%s]|%s: ' % (prompt, 'n', 'y')
  
 while True:
  ans = raw_input(prompt)
  if not ans:
   return resp
  if ans not in ['y', 'Y', 'n', 'N']:
   print 'please enter y or n.'
   continue
  if ans == 'y' or ans == 'Y':
   return True
  if ans == 'n' or ans == 'N':
   return False
  
class Colors:
 HEADER = '\033[95m'
 OKBLUE = '\033[94m'
 OKGREEN = '\033[92m'
 WARNING = '\033[93m'
 FAIL = '\033[91m'
 ENDC = '\033[0m'
 
 def disable(self):
  self.HEADER = ''
  self.OKBLUE = ''
  self.OKGREEN = ''
  self.WARNING = ''
  self.FAIL = ''
  self.ENDC = ''
 def print_success(self,msg):
  print self.OKGREEN + msg + self.ENDC