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Showing posts with the label Set

Adding Values To Set Contained In Multiprocessing.manager().list()

I am trying to update a Manager().list() of sets with tuples but having trouble getting anything to… Read more Adding Values To Set Contained In Multiprocessing.manager().list()

Time Complexity Of Checking Whether A Set Is Contained In Another Set

I am trying to implement the example of finding the shortest substring of a given string s containi… Read more Time Complexity Of Checking Whether A Set Is Contained In Another Set

Grouping Integers By Set Membership In Python

Working in Python, given a list of N sets of integers from the range range(s,n), how can I build a … Read more Grouping Integers By Set Membership In Python

Python Isdisjoint() Runtime

What is the algorithmic runtime of Python 2.7's isDisjoint(other) method for sets? Is it faster… Read more Python Isdisjoint() Runtime

Difference Of Sets Of Multiple Values For Single Column In Pandas

I've got some grouped tabular data, and in this data there's a column for which each data p… Read more Difference Of Sets Of Multiple Values For Single Column In Pandas

Huge Difference In Timing Between Sorting A Set Vs Sorting A List In Python

I was wondering whether I should have my data structure as a set or a list. Mostly I will do set op… Read more Huge Difference In Timing Between Sorting A Set Vs Sorting A List In Python

Set Comprehension In Python

In Python3 I wrote a simple one line code as follows : { 2*x for x in {1,2,3,4} } but I m gettin… Read more Set Comprehension In Python

Unexpected Behavior For Python Set.__contains__

Borrowing the documentation from the __contains__ documentation print set.__contains__.__doc__ x.__… Read more Unexpected Behavior For Python Set.__contains__

Python. Identity In Sets Of Objects. And Hashing

How do __hash__ and __eq__ use in identification in sets? For example some code that should help to… Read more Python. Identity In Sets Of Objects. And Hashing

Python Union Of Sets Raises Typeerror

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

Python: .pop() On Unordered Sets

I have a question regarding the .pop() method. In the documentation, it states that on sets: Remov… Read more Python: .pop() On Unordered Sets

Adding The Number 1 To A Set Has No Effect

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

Why Is `{*l}` Faster Than `set(l)` - Python Sets (not Really Only For Sets, For All Sequences)

So here is my timings: >>> import timeit >>> timeit.timeit(lambda: set(l)) 0.7210… Read more Why Is `{*l}` Faster Than `set(l)` - Python Sets (not Really Only For Sets, For All Sequences)

How To Check If All Elements In A Tuple Or List Are In Another?

For example, I want to check every elements in tuple (1, 2) are in tuple (1, 2, 3, 4, 5). I don'… Read more How To Check If All Elements In A Tuple Or List Are In Another?

Is There A Limit To The Number Of Values That A Python Set Can Contain?

I am trying to use a python set as a filter for ids from a mysql table. The python set stores all t… Read more Is There A Limit To The Number Of Values That A Python Set Can Contain?

Check For Any Values In Set

Suppose I have the following set: things = {'foo', 'bar', 'baz'} I would l… Read more Check For Any Values In Set

Rearranging A Dictionary Based On A Function-condition Over Its Items

(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

Python Set With The Ability To Pop A Random Element

I am in need of a Python (2.7) object that functions like a set (fast insertion, deletion, and memb… Read more Python Set With The Ability To Pop A Random Element

Working Out Dependent Groups

Using the following function I can generate some test data. import random, string a = list(string.a… Read more Working Out Dependent Groups

Hashable Data Structure With No Order And Allowed Duplicates

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