A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


  • 4 years ago

I am on PS4 I dont understand why if (i + shift) < len(uppercase): coder[uppercase[i]] = uppercase[i + shift] returns key value pair in dict when i is 0 and shift is - 2 (as happens in prob set sol with decoder) as there is no index -2 in uppercase string interestingly ' ' as key gives 'x' why is this so

  • This Question is Closed
  1. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    the shell (or idle) is a great place to play and experiment http://dpaste.com/787903/ from the Tutorial in the Python documentation: an intro to slices in this strings section http://docs.python.org/tutorial/introduction.html#strings and see note 3 from: http://docs.python.org/library/stdtypes.html#sequence-types-str-unicode-list-tuple-bytearray-buffer-xrange The Python documentation should be installed on your computer - the Tutorial is a must-read. http://stackoverflow.com/questions/509211/good-primer-for-python-slice-notation http://effbot.org/zone/python-list.htm

  2. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thanks bwCA Sorted

  3. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...


  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.