I’m trying to do a binary search through a list of tuples, when I give a inputq = “BB”, it is not show a correct search. This is my data: This my code: when I give inputq = “BB” the output it always show like this: (‘BF’, ‘Burkina Faso’, 13.0, -2.0) I woul…
Tag: binary-search
Binary Search – Is this correct? and how to get position of search term
I am a beginner to programming. I have three questions about my binary search code I wrote (in Python): (1) When I compared my code to the ones I found on the net, I see that everyone uses low and high values parameters. Wondering if mine can have errors that I am not seeing or is it just that the
Find the indices where a sorted list of integer changes
Assuming a sorted list of integers as below: I want to find the indices where the values changes, i.e. One approach is to use itertools.groupby: Output This approach is O(n). Another possible approach is to use bisect.bisect_left: Output This approach is O(k*log n) where k is the number of distinct elements. …
Why does a function in a class does not return anything?
For exercising reasons, I am trying to implement a class SSM which stands for Static Sorted Map in python in order to implement the methods min_value(self) : find the minimum value max_value(self) : find the maximum value search(self, key): to find an element in the list The list is assumed to be sorted. Here…
bisect_left on first item of list within list, Python 3
I have a list like this for example: and I need to = bisect_left the first item of each tuple to find an index in the list. However, I can’t think of a way of doing this without creating a list of all of these first items before hand: exampleList = [L[i][0] for i in range(len(L))] any ideas on another
What are python’s equivalents of std::lower_bound and std::upper_bound C++ algorithms?
Does python provide functions for performing binary search on sorted lists, analogous to the std::lower_bound and std::upper_bound algorithms of the C++ Standard Library? Answer Those functions are located in the bisect module: bisect.bisect_left(a, x, lo=0, hi=len(a)) is the analog of std::lower_bound(). bis…
Find the smallest number that is greater than a given number in a sorted list
Given a sorted list of numbers, I need to find the smallest number that is greater than a given number. Consider this list: Say the specified number is 320. Then, my method should return 353 as 353 is the smallest number greater than 320. I am trying to use a slightly modified form of binary search; however o…
Binary search (bisection) in Python
Is there a library function that performs binary search on a list/tuple and return the position of the item if found and ‘False’ (-1, None, etc.) if not? I found the functions bisect_left/right in the bisect module, but they still return a position even if the item is not in the list. That’s…