title: Python: Create a tuple from a command line input
body: <p>I have a program which provides a command line input like this:</p>
  
  <p>python2.6 prog.py -p a1 b1 c1</p>
  
  <p>Now, we can have any number of input parameters i.e. -p a1 and -p a1 c1 b1 e2 are both possibilities.</p>
  
  <p>I want to create a tuple based on the variable input parameters. Any suggestions on how to do this would be very helpful! A fixed length tuple would be easy, but I am not sure how to implement a variable length one.</p>
  
  <p>thanks.</p>