I have a nested data structure (e.g. mydict[names[num]]) which is difficult to read in code. Hence I would like to create a proxy (alias) and use it to modify this structure. Given the AssertionError on id(a) = id(b), do I understand correctly python separates short and long_name during comprehension and allo…
Tag: data-structures
Select n items from a set of subsets [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 1 year ago. Improve this question I’m wondering if there exists an algorithm that can solve this problem: Suppose you hav…
Sort the list of tuples in python
I have tuples like this these are the coins and its expiries. The date is in string format, so the arrangement is wrong. so i have changed the format to date and tried to arrange. I have tried the below code. and the result is as expected as sorted. now when i want back in older format which i mentioned
How to transform a .csv string list representation to list?
Suppose a .csv file which looks like this: title: is the name of the column and [senior innovation manager] is the first row. Note: both strings (title and row) look exactly as written here. The idea is to convert this list string representation to an actual python list: However when tried the above code the …
Palindrome question use of lambda and key
Hey guys so I was working on this problem on the algoExpert platform, but I am struggling to understand what longest and currentLongest are really doing. Just from the beginning, I am not entirely sure what the currentLongest = [0, 1] is doing, is it just saying that it will have 2 values? Are odd and even re…
Getting KeyError in the following code to find “minimum number square to the number”
I am getting the error in the following code for the above stated problem using memoization please help me find the error and correct the code. Answer It would help if you provided the full error output, which should include the line number and surrounding code. However, I suspect the issue lies in the follow…
Implementing Insertion sort in Python
I am trying to write the insertion sort algorithm ( without the help of the solution in the book) and so far came up with this algorithm, when I matched it with the solution, it looks different. This is the code I wrote: Is this code still valid as an insertion sort? Algo in the book: Answer Looks like a
How to create a nested dictionary from pandas dataframe?
I have the following pandas dataframe that has thousands of rows: I want to create a nested dictionary where people’s names are the keys and the dictionary of their food/drink combination is the value. Something like this: Answer I solved this problem with the following code:
Instead of using primitive methods, should I be using a data structure?
This is my current code for a tax calculator based on age. I think that it would be easier to update in the future if I used data structures when calculating the brackets. Could someone help me make sense of this? So the code that I’m assuming that I need to change is: Also, I’m trying to learn so…
Is it a mandatory to have two classes(Node,Tree) while implementing a binary tree?
This may sound silly but trust me , I have searched for various articles online and could not find a proper explanation or no explanation at all , Does it really need two classes one for Node and one for tree to implement binary tree? for Instance , let’s take a simple python code : this is bascially wh…