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I have list of tuples/lists (-1, 0, 1) (-1, 1, 0) (-1, 2, -1) (-1, -1, 2) (0, 1, -1) I need them to… Read more Hashable Data Structure With No Order And Allowed Duplicates

When I try to run the following code: import json d = {'testing': {1, 2, 3}} json_string =… Read more Set Object Is Not Json Serializable

I have a series of texts that are instances of a custom WebText class. Each text is an object that … Read more Separating Nltk.freqdist Words Into Two Lists?

I'm implementing a disjoint set system in Python, but I've hit a wall. I'm using a tree… Read more Disjoint-set Forests In Python Alternate Implementation

I couldn't figure out how to perform line.startswith('substring') for a set of substrin… Read more Check If String Begins With One Of Several Substrings In Python

Consider a sequence of sets: >>> [{n, 2*n} for n in range(5)] [{0}, {1, 2}, {2, 4}, {3, 6}… Read more Python Union Of Sets Raises Typeerror

I was trying to find the second largest number in a list and thought of converting list into set, a… Read more Find A Second Largest Number In A Python List

I recently posted a question using a lambda function and in a reply someone had mentioned lambda is… Read more Lambda Versus List Comprehension Performance

Does anyone know about a fast OrderedSet implementation for python that: remembers insertion order… Read more Python Orderedset With .index() Method

I have some list of data, for example some_data = [1, 2, 4, 1, 6, 23, 3, 56, 6, 2, 3, 5, 6, 32, 2, … Read more What Is Pythononic Way Of Slicing A Set?

I have two large lists train and keep, with the latter containing unique elements, for e.g. train =… Read more Keep All Elements In One List From Another

I got the following error AttributeError: 'NoneType' object has no attribute 'add'… Read more Attributeerror: 'nonetype' Object Has No Attribute 'add'

(In relation to this question I posed a few days ago) I have a dictionary whose keys are strings, a… Read more Rearranging A Dictionary Based On A Function-condition Over Its Items

I cannot add the integer number 1 to an existing set. In an interactive shell, this is what I am do… Read more Adding The Number 1 To A Set Has No Effect

I have below list: a=[{'list1': ['35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52… Read more Get Common Values Out Of A List In Python

I have a list of tuples like this : all_tuples=[(92, 242),(355, 403),(355, 436),(355, 489),(403, 4… Read more Intersection Of Tuples In A List - Python

i have been trying to figure out an effective algorithm that returns a set such as it's interse… Read more Generating A Set From Given Sets Such It's Intersection With All The Sets Is Different From {}

Suppose we are given n sets and want to construct all minimal sets that have at least one element i… Read more Find Sets That Contain At Least One Element From Other Sets

I'm trying to execute the following >> from numpy import * >> x = array([[3,2,3],[4… Read more Constructing A Python Set From A Numpy Matrix

Why was Python's filter designed such that if you run filter(my_predicate, some_set), I get bac… Read more Why Doesn't Python's Filter(predicate, Set) Return A Set?