[Baypiggies] string to list question

[Andrew Toulouse]

Looks like you're trying to turn it into a bunch of tokens. I'm assuming you have an arbitrarily long string.

You could loop through each character in the input, append it to the stack, determine whether the stack is  a valid token, and output it (and reset the stack if so). In pseudocode:

def tokenizer(z):
  def isValid(characterList):
    return true if characterList is ['A'], ['T','/','G'], or ['C'] #this is pseudocode

  stack = []
  for character in z:
    stack.append(character)
    if (isValid(stack)):
      yield ''.join(stack)

print(list(tokenizer("AT/CG")))

Disclaimer: This is absolutely not super-optimal and is untested (and my Python is rusty, I've been doing almost all Java and Objective-C lately) but it should get the job done if you just need something quick, I think.

On Aug 4, 2010, at 9:43 PM, Brian Rue wrote:

> Naive solution:
> 
> zlist = [z[0], z[1:4], z[4]]
> 
> On Wed, Aug 4, 2010 at 9:37 PM, Vikram K <kpguy1975 at gmail.com> wrote:
> Suppose i have this string:
> z = 'AT/CG'
> 
> How do i get this list:
> 
> zlist = ['A','T/C','G']
> 
> 
> _______________________________________________
> Baypiggies mailing list
> Baypiggies at python.org
> To change your subscription options or unsubscribe:
> http://mail.python.org/mailman/listinfo/baypiggies
> 
> _______________________________________________
> Baypiggies mailing list
> Baypiggies at python.org
> To change your subscription options or unsubscribe:
> http://mail.python.org/mailman/listinfo/baypiggies

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/baypiggies/attachments/20100804/e322cbd5/attachment.html>