Questions tagged [python]

This challenge is related to the Python language. Note that challenges that require the answers to be in a specific language are generally discouraged.

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-3 votes
2 answers
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King of the Hill: Greed Control [duplicate]

King of the Hill: Greed Control What is Greed Control Greed control is a multiplayer round-based game in which in every round, a player bet a number inside a ...
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  • 519
7 votes
2 answers
208 views

How to shorten Python code involving the sum of reciprocals?

I have a coding problem that goes like this: Given a positive integer \$N\$, return a list of all possible pairs of positive integers \$(x,y)\$ such that $$\frac1x+\frac1y=\frac1N$$ I already solved ...
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  • 3,821
-8 votes
1 answer
290 views

The right way to return [[0, 0, 0], [0, 1, 0], [0, 0, 0]] [closed]

Here is the program to return [[0, 0, 0], [0, 1, 0], [0, 0, 0]] [[0]*3,[0,1,0],[0]*3] Try it online! Can you shorten this code?...
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  • 2,493
10 votes
2 answers
772 views

Can I shorten this Python code for simulating a car driving around

I am trying to write a solution to the following problem using as few characters as possible (to meme my friend and introduce him to golfing). Can any improvements be done to my code? So the problem ...
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4 votes
3 answers
535 views

How to shorten the Python code? Part II

Code Python 3, 245 bytes ...
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  • 2,493
9 votes
4 answers
2k views

How to shorten the python code?

I'm writing a program that takes a number from input (call it x), loops from 0 to (x - 1) (let's call our iterator y) and prints \$y^x+x\$ for each y. After the loop, it then prints "SUM: N" ...
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  • 2,493
20 votes
1 answer
462 views

How to solve the LCM in 50 bytes of Python

I've recently stumbled upon a Russian site called acmp.ru, in which one of the tasks, HOK, asks us to find the LCM of two positive integers. The full statement, translated to English is as follows: ...
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  • 16.9k
6 votes
2 answers
384 views

Pushing the limits to make a piece of code solving the K-Goodness String problem shorter

I am trying to push my limits of making a python code as short as possible. I left the readability part way behind. I was attempting the K-Goodness String problem from Round A of Google Kick Start ...
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-1 votes
1 answer
212 views

Shortest way to convert a float to an int [closed]

I'm not really sure if this is the right place to ask this. Now, I know I can convert a float to an int with int, but is there some shorter way?
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  • 3,053
4 votes
2 answers
715 views

Write an infinitely nested generator comprehension

The goal is to create a generator generator [...] generator generator comprehension. The generator must be created via generator comprehension. The following expression must be valid for any number ...
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6 votes
2 answers
645 views

Bigram frequencies in text

Introduction This challenge is about producing a code to count the frequency of bigrams in a text. A bigram is two consecutive letters in a text. For instance 'aabbcd' contains the bigrams aa, ab, bb, ...
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7 votes
2 answers
2k views

How to ignore first user input in Python 3

I have 2 inputs: 1 single number and some numbers separated by whitespace: 1 1 2 3 4 5 I want to loop over the second input, and I don't need the first input. I ...
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  • 533
5 votes
1 answer
193 views

Tips on golfing this Python program to generate a palindrome from a string

I wrote this function in 48 bytes and I wonder, is there any way to write this code 2 characters shorter? p=lambda n,c:(n*c)[:n//2]+(n*c)[:n//2+n%2][::-1] The ...
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7 votes
4 answers
401 views

KotH - Floating Point Prisoners Dilemma

Background So, nowadays the popular Prisoner's Dilemma variant is the Prisoner's Trilemma, where there are three options. I can easily see that being increased, so I figured Why settle for three ...
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  • 179
12 votes
16 answers
2k views

Random Prisoner's Trilemma - Python 3 KOTH

The Prisoner's Dilemma, but with 3 choices, and the payoffs are random! Each round, your bot recieves a 3x3 grid and chooses a row to play. The grid might be this: ...
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  • 1,995
6 votes
6 answers
684 views

Let's play Judgement!

In this king-of-the-hill challenge, you will be making a python 3 bot to play the card game judgement! Sandbox Rules Judgement is a hand based game similar to games like rummy. In each round, 7 cards ...
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22 votes
9 answers
3k views

How can this code be more "golfed"?

I'm not sure if this is the right place to ask, but I found this similar question so I'll go ahead. I'm very new to code golfing, so keep your smothered laughs and throw-up emoji's to yourselves ...
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8 votes
1 answer
333 views

I'm Jelly of Python (Robbers)

What does "jelly" mean in the title?. Cop's thread Robbers, you are to choose an uncracked Cop answer, and attempt to find a Jelly program which is: shorter than the Cop's answer solves the ...
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12 votes
3 answers
1k views

I'm Jelly of Python (Cops)

What does "jelly" mean in the title?. Robber's thread Jelly has an "Evaluate the argument as Python 3" atom, ŒV which takes a string as an ...
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17 votes
17 answers
1k views

Liars and Guessers

Github You have probably played, and may even have written a program to play, a simple number guessing game. If so, this probably looks familiar: ...
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  • 843
-3 votes
1 answer
180 views

Python Prime Problem [duplicate]

Your challenge is to write a Python program to print all the primes (separated by whitespace) less than a given integer N with an asterisk (...
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2 votes
6 answers
256 views

Maximum distance to station

Looking at the following hackerrank problem: https://www.hackerrank.com/challenges/flatland-space-stations You are given a number n where cities can be at indices 0 to n-1 and also given an unsorted ...
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-6 votes
1 answer
162 views

No. Of Factors Does the Number Have [duplicate]

Create a function which takes in a input integer and then returns the number of factors it has, like if you pass 25 then it will return ...
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  • 157
2 votes
0 answers
188 views

Using subscription for the iteration variable in Python for loop [closed]

I just realized that Python allows more than names as for loop iteration variables: for a[i] in sequence: pass The real fun ...
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  • 129
3 votes
2 answers
415 views

Remove duplicates from list and order it by count? (python 3)

How do I remove all duplicates from list and order it based on count? ...
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42 votes
17 answers
5k views

Tips for restricted source in Python

Just like code-golf, restricted-source pushes one to exploit quirks and hidden features of the Python language. We already have a place to collect all these tips for code-golf, those for restricted-...
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  • 84.8k
1 vote
2 answers
714 views

Shortest Python 3 for sum of arithmetic progression

Input: from STDIN number of vertices in Graph \$2 \leq N \leq 100\$. Rules: [Code size] = max ([code length without spaces, tabs and newlines], [total code length divided by 4]) Math formulation: In ...
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  • 323
4 votes
2 answers
1k views

Shortest python3 code for: Find the difference between a number and a power of two not exceeding a given number

So, this is a task from one very popular educational site in Russia: https://acmp.ru/index.asp?main=task&id_task=786&ins=1 Mathematically, you need to find the power of two not exceeding the ...
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  • 323
16 votes
8 answers
1k views

Omit needless spaces for me

A great Python golfing tip is to omit needless spaces. But if you are like me, you don't always have the time to search for which spaces to remove. If only there was a way to speed up the process... ...
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  • 16.9k
12 votes
3 answers
2k views

Intersection of circles – How can I reduce this golf code to 127 bytes?

I started a CodeWars kata in Python, just two days ago, related to code golf. Task: Given two congruent circles a and b of radius r, return the area of their intersection rounded down to the nearest ...
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  • 123
4 votes
2 answers
3k views

Shortest Solution in Python 3 for Caught Speeding - CodingBat

I am trying to find the shortest code in python 3, to solve this problem: You are driving a little too fast, and a police officer stops you. Write code to take two integer inputs, first one ...
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4 votes
1 answer
527 views

From text to ascii art from CodinGame practice puzzle

On CodingGame, there is a Puzzle that ask to write words with ascii art. I solve the puzzle then tried to golf it. What improvement can I do on it? ...
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11 votes
3 answers
535 views

Decode ascii and reversed words sentence

In a challenge of CodingGame, there is a challenge that ask you to decode a string composed by reversed words ('Hello world' > 'olleH dlrow') then each characters converted into ascii value separeted ...
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15 votes
12 answers
1k views

The Celestial Bureaucracy KoTH

In Imperial China, ranks in society were not decided by birth or wealth, but by a person's ability to excel in the Imperial Examinations. The Jade Emperor, divine ruler of the Heavens, has called for ...
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7 votes
2 answers
864 views

Farkle Fest 2k19: An AI dice game tournament

Farkle Fest 2k19 In this challenge, we will be playing the semi-popular dice game Farkle. Farkle is a dice game that has players selecting to save dice or risk rerolling the die for more points to ...
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-3 votes
7 answers
637 views

Shortest way to get a TypeError

It's simple, simply write the shortest code to raise a TypeError. In Python you can do: raise TypeError However it should be ...
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  • 1,099
9 votes
1 answer
653 views

Convert a string containing integers to list of integers

What is the shortest way to convert a string containing integers separated by spaces to a list of integers? input : "-3 1 5 8 10" output : [-3, 1, 5, 8, 10] I regularly face this situation and I ...
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  • 347
27 votes
13 answers
2k views

Adventurers in the Ruins

Test Driver • Challenge Discussion • Submit Adventurer (Image Source) Several rival adventurers are raiding the ruins for treasure, but they can only carry so much at a time and have their ...
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  • 9,791
5 votes
3 answers
2k views

A nasty little memory leak

Below Python code generates memory leak. Challenge: Fix the memory leak with minimal changes to the code as measured by Levenshtein distance to the original code. You may only change the code before ...
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0 votes
1 answer
309 views

Python code to produce C++14 hex integer literal with ticks

tl;dr? See bottom for The Competition Integer literals While programming, the 64-bit hexadecimal literal 0x123456789abcdefL is difficult to gauge the size of. I ...
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57 votes
49 answers
11k views

A game of dice, but avoid number 6

Tournament over! The tournament is now over! The final simulation was run during the night, a total of \$3*10^8\$ games. The winner is Christian Sievers with his bot OptFor2X. Christian Sievers also ...
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  • 6,657
20 votes
19 answers
5k views

Iterated Prisoner's Trilemma

CHALLENGE STATUS: OPEN Comment, open a PR, or otherwise yell at me if I'm missing your bot. Prisoner's dilemma ... with three choices. Crazy, huh? Here's our payoff matrix. Player A on the left, B ...
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55 votes
37 answers
10k views

Robot Roulette: High stakes robot gambling

Final Standings +----------------------------------+---------+---------+---------+----------------------------+ | Name | Score | WinRate | TieRate | Elimination ...
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  • 691
5 votes
4 answers
661 views

Russian BS - Submissions accepted until October 13th

The ChatRoom is here I love playing the card game BS, but sometimes, it just doesn't have enough oomph for my short attention span. Instead, let's play some Russian BS. Rules Here is a quick guide ...
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15 votes
4 answers
1k views

Get the lowest possible pylint score within 128 bytes of python

pylint has no lower bound on the scores it will give your code. It uses the following metric to score code, with the maximum score being 10: ...
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  • 161
8 votes
3 answers
692 views

Partially-Observable Connect-4

The Game You will be playing an (almost) standard game of Connect-4. Unfortunately, it is a correspondence game and someone has placed black tape on every second row starting from the bottom, so that ...
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  • 2,997
1 vote
1 answer
526 views

Dictionary Code Golf [closed]

New to code golf and enjoying it. I have a problem that I cannot figure out and am curious if others can solve it. Start with two dictionaries, y and ...
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37 votes
3 answers
5k views

Primality testing formula

Your goal is to determine whether a given number n is prime in the fewest bytes. But, your code must be a single Python 2 expression on numbers consisting of only ...
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  • 137k
9 votes
2 answers
5k views

Python: shortest way to interleave items from two lists

I'm trying to get the shortest way (character possible) to obtain List 3. List 1 and List 2 are already given to me as arguments and are the same length. ...
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  • 93
11 votes
9 answers
1k views

White Elephant Exchange

It's Christmas in July, so what better way to celebrate than a virtual white elephant gift exchange! For this King of the Hill challenge, you must create a bot that plays in a White Elephant exchange ...
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  • 9,791