Print a pyramid of integers in a list slicing

Question

1.00/5 (2 votes)

See more:

So I am trying to find a solution to printing one list that contains sublist of the given lists that creates a pyramid and if the given list is empty, return the empty list. If n is even, the last list should be the empty list. If n is odd, the last list should contain a single value. What I have is currently doing a infinite loop of an empty list

Example: input: list = [1,2,3,4] output: [[1,2,3,4],
                                          [2,3],
                                          []]
Example2: input: list = [1,2,3,4,5] output: [[1,2,3,4,5],
                                             [2,3,4],
                                              [3]]

What I have tried:

Python

aList = []
while ogList != []:
  aList.append(ogList)
  ogList = ogList[1:-1]
return aList

Posted 4-Sep-22 11:24am

cardanjude1

Updated 4-Sep-22 20:45pm

CPallini

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CPallini · Accepted Answer · 2022-09-04T20:45:00

Solution 1

You correctly identified the recursive step, but failed to implement the recursive function. Try

Python

def recur_triangle(ilist, olist):
  olist.append(ilist)
  if len(ilist) < 2:
    return
  recur_triangle(ilist[1:-1], olist)

olist = []
recur_triangle([1,2,3,4,5], olist)
print(olist)

Posted 4-Sep-22 20:45pm

CPallini