I am struggling with dynamic substrings. My list can vary in size, containing anywhere from 20 to 1000 elements. I want to create a new list based on a variable number that includes elements starting from -10 up to that variable. For instance (using pseudo-code):
L = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
variable = 12
print L[substring:variable]
>>> L = [2,3,4,5,6,7,8,9,10,12]
Despite my efforts, I can't seem to get it right as the variable is constantly changing by one.
This is the code snippet I have been working on:
def Existing(self, Pages):
if(self.iter <= 10):
list = self.other_list[:self.iter]
else:
list = self.other_list[self.iter-10:self.iter]
result = 0
page = Pages[0]
list.reverse()
for blocks in Pages:
if(list.index(blocks) > result):
result = list.index(blocks)
page = blocks
return page
This method is intended to find the element with the farthest index. However, this part may be confusing. Let's take an example:
list = [1,2,3,4,1,5,2,1,2,3,4]
The desired outcome of the method should be 5 since it is the element with the highest index value. The issue arises due to substring operations in self.other_list.
Can you offer guidance on how to correct this problem? Any advice would be greatly appreciated.
EDIT: To clarify the problem further, here are additional examples.
Let's assume the list Pages contains pages currently in use. The second list "list" consists of all pages that have been used before. The method aims to identify a page that has not been used for the longest duration, based on index values. How do we determine the farthest element? It refers to the one with the smallest index (accounting for duplicates).
For instance:
Pages = [1,3,5,9]
and
list = [1,2,5,3,6,3,5,1,2,9,3,2]
In this scenario, the method should return 5.
To summarize: I need help finding the correct substring output:
With list =[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]
For variable 12: [2,3,4,5,6,7,8,9,10,12]
for 13: [3,4,5,6,7,8,9,10,11,13]
etc :-) I understand this may be a complex issue, so I kindly request your focus solely on substrings. Thank you very much!