title: AttributeError: 'Namespace' object has no attribute 'check'
body: <p>I am trying to run a python script on the command line with different arguments to it. There is one positional paramter ( num ) and others are optional parameters. I try to run [ python newping.py 10 -c ] but get the below error. Is there any error that I am not able to figure out? </p>
  
  <pre><code>import argparse
  
  def fibo(num):
   a,b = 0,1
   for i in range(num):
      a,b=b,a+b;
   return a;
  
  def Main():
   parser = argparse.ArgumentParser(description="To the find the fibonacci number of the give number")
   arg1 = parser.add_argument("num",help="The fibnocacci number to calculate:", type=int)
   arg2 = parser.add_argument("-p", "--password", dest="password",action="store_true", help="current appliance password. Between 8 and 15 characters, lower case, upper case and numbers")
   arg3 = parser.add_argument("-i", "--ignore",help="ignore the args",action="store_true", dest="ignore")
   arg4 = parser.add_argument("-c", "--check", help="performance metrics",action="store_true", dest="performance")
   arg5 = parser.add_argument("-m", "--node/model",dest="Node_Model",help="Type of the Model",action="store_true")
   parser.add_argument("-pf", "--permfile", help="increase output verbosity",action="store_true")
   args = parser.parse_args()
  
   result = fibo(args.num)
   print("The "+str(args.num)+"th fibonacci number is "+str(result))
  
   if args.permfile:
  
          for x in range(1,len(vars(args))):
              value = locals()["arg"+str(x)]
              print(value.dest+ " "+ value.help)
  
   if args.password:
      print("I am asking for the password")
  
   if args.ignore:
      print("This is to ignore the command")
  
   if args.check:
      print("Check the performance of the server")
  
  
   if __name__ == '__main__':
      Main()
  
  
   Output :
   The 10th fibonacci number is 55
   Traceback (most recent call last):
   File "newping.py", line 41, in &lt;module&gt;
    Main()
   File "newping.py", line 36, in Main
     if args.check:
     AttributeError: 'Namespace' object has no attribute 'check'
  </code></pre>