[Tutor] parsing woes

[Alan Gauld]

> when I try to run this code to see what the values are:
>     if parameters[0]:
>          print parameters[0]
>     if parameters[1]:
>          print parameters[1]
>     if parameters[2]:
>          print parameters[2]

There are at least two approaches you could use:

try:
   if ....
except IndexError:
   pass

That will simply ignore the index error.

Or more explicitly (prevention is better than cure philosophy)

num = len(parameters)
if num == 0: print "No parameters"
if num > 0: print parameters[0]
if num > 1: print parameters[1]
if num > 2: print parameters[2]
if num > 3: print "Too many parameters!"

HTH,

Alan G.