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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8
votes
1answer
330 views

How to find the item in a list whose f(item) is the smallest?

I have a list, l and a function f. f is not strictly increasing or decreasing. How can I find the item in the list whose f(item) is the smallest? For example, let's say the list is: l = [1, 2, 3, 4] ...
7
votes
3answers
312 views

How can I shorten this python code analyzing a 3d grid?

My Python 3 function golf(...) should take a list of lists of lists of strings representing a solid cube and return whether there are any places in which two equal strings are directly next to each ...
4
votes
1answer
349 views

Need help golfing Python 3 code to calculate volume & surface of spheroids in <150 bytes

I want to write a function golf(C, A) that takes the height (C = 2*c) and the width (A = 2*a) of an oblate (left image) or prolate (right image) spheroid or a sphere as parameters and returns the ...
12
votes
4answers
374 views

Strategies for representing a given large integer using arithmetic expression

I have a specific number in mind, but it's part of a challenge I'm doing, and I don't want people to do (all) the work for me. Here is a number which has the same digits, but shuffled: ...
3
votes
0answers
233 views

Most creative/diabolical/entertaining way to find Python version? [closed]

There are important differences between Python 2 and 3, so it's often useful to know which version of the interpreter is running your code. The straightforward method is something like this: def ...
1
vote
2answers
190 views

Shortening str.replace() [duplicate]

In Python it is often necessary to use str.replace(a,b), however .replace is rather long and feels unnecessary. So is there a shorter alternative to str.replace. Alternatively is there a similar ...
3
votes
3answers
247 views

Returning the range of a number as a palindrome

I like to do programming challenges in my free time to teach myself and keep fresh, this one I can't seem to optimize though and it's driving me insane. The goal is essentially, "Given a number, ...
-2
votes
1answer
221 views

Python Golfing Suggestions [closed]

I have read: Tips for golfing in Python I would like to golf this code further. Any more tips? x,y,q,w=[int(i) for i in raw_input().split()] while 1: a=int(input()) s=d="" if q>x: s="W" q-=...
4
votes
5answers
276 views

Python Code Reviewer

Task Your mission is to create a program that reviews Python code. The solution can be written in any language! It must take input that contains python code. The program must add # This is not ...
11
votes
1answer
401 views

Write a panic script to remote secure a Mac Pro from an untrustworthy local user [closed]

The Situation Suppose I allow "Shady Sam" admin access on my workstation to perform an important administrative task on my Mac Pro for me by giving them a temporary root login password. (Assume they ...
13
votes
1answer
586 views

Golfing with Python Import

When is it beneficial to use inline, single use importing in Python? For example: __import__("x").doSomething() Is the above ever shorter than the below? import x x.doSomething() Or from x ...
10
votes
7answers
1k views

Non-idempotent Python [closed]

Write a few lines of Python code, X, that does not reference any global variables, such that def method(): X print(a) method() prints 1 but def method(): X X print(a) method()...
0
votes
1answer
81 views

Merging a dict compression referencing the original list into 1 line [closed]

Background A question wanted to solve a problem in a way that made it unreasonably complex: http://stackoverflow.com/a/31551257/29347 The problem in the original question is: Take a list of (...
2
votes
1answer
156 views

all non-empty sublists partitionings of a list

I had to write a code for finding all non-empty sublists partitionings of a list: def f(s): if s: for j in range(1,len(s)+1): for p in f(s[j:]): yield [s[:j]]+...
12
votes
3answers
992 views

Is there a shorter way to get user input in python?

This is not a challenge. I'm wondering if it's at all possible to get user input into two separate variables in python (2 or 3) with less than 19 bytes. These are all the shortest I can get: a,b=...
7
votes
2answers
401 views

Generalized integer casting in Python

Background I have a string in Python which I want to convert to an integer. Normally, I would just use int: >>> int("123") 123 Unfortunately, this method is not very robust, as it only ...
3
votes
1answer
234 views

Minimum of a Polynomial in Python

What is the shortest amount of code that can find the minimum of an inputted polynomial? I realize that you can import packages like Numpy and others, but using only user defined functions, what is ...
1
vote
1answer
1k views

How can I use cmp(a,b) with Python3?

I want to compare a and b. How can I use cmp(a,b) with Python3 ?
5
votes
4answers
493 views

How could I reduce the length of this code?

I need to reduce the length of this code in Python 3 as much as possible (even if it will be less readable): a,b,x,y=[int(i) for i in input().split()] while 1: r='' if y<b:r='S';y+=1 if y>b:...
9
votes
1answer
1k views

Concatenate lists of strings item-wise in Python

This is a tips question for golfing in python. Suppose you have two lists of strings, and you want to concatenate the corresponding entries from each list. E.g. with a=list("abcd") and b=list("1234"),...
-1
votes
1answer
182 views

How can I rename .split or .join in python? [duplicate]

I can rename a built in module like this: r=range list(range(10)) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] but whenever I rename .split, I get an error: s=split NameError: name 'split' is not defined How ...
16
votes
3answers
2k views

Is there a shorter way to assign one of two variables in Python?

This is a tips question for golfing in python. In multiple golfs I've done in Python, a fixed value is assigned to one of two variables chosen by a Boolean. The chosen variable is overwritten by the ...
12
votes
1answer
1k views

Am I code-golfing properly?

I am curious if I am Code Golfing properly. I set the challenge for myself to make a small hashing program into a single statement in Python. I first started off with: from itertools import ...
8
votes
1answer
1k views

Python 3 - Tried Golfing My Assignment

Note: This isn't as much a golfing challenge; it is more so asking for golfing suggestions. Recently I had a Python assignment for my web development class, in order to check whether we could code. ...
12
votes
3answers
492 views

Auto-meta-code-golf

You are sick of all of the codegolf challenges. Hence you decide to write a program that will automatically golf some Python code for you. There are 3 test cases: print quickSort([0,7,3,-1,8,10,57,...
7
votes
3answers
495 views

Looking for shorter alternatives to `range(…)`

The best solution I've found so far for a golf code puzzle I'm working on includes two rather fat-looking invocations of range. I'm very new at code golf, especially in Python, so I could use a few ...
26
votes
7answers
5k views

Golf Practice: Python [closed]

This is a challenge of practicing golf optimization in Python -- reusable tricks and shortcuts to shave off a few characters. Many will be familiar to Python golfers and use common ideas from the ...
12
votes
1answer
214 views

Python advice: Portability of introspective function call

In Python, you can use the dir function on any object to get a list of the names of its instance functions: >>> dir('abc') ['__add__', '__class__', '__contains__', '__delattr__', '__doc__', '...
5
votes
8answers
599 views

Golfing the Core

Note: although this is tagged as Python, other languages are permitted Challenge What you have to do is write the shortest functions to perform the same actions as the following Python 2 built in ...
1
vote
0answers
133 views

Write the shortest one-statement python quine [duplicate]

I wrote this one-line one-statement Python quine a little while back. print (lambda x: x + str((x,)))('print (lambda x: x + str((x,)))',) The point is, it's all one line, and one function (i.e. no ...
10
votes
13answers
23k views

Smallest python script to print even numbers 0 to 100

I'm work on a problem which I set myself for fun, which is to create a python script which prints the even numbers from 0 to 100. The challenge is to make the script as small as possible. This is what ...
14
votes
2answers
716 views

Maximum number of PEP8 violations in a single line

Your task is to write a file which contains a line with many pep8 violations. The rules: We use pep8 version 1.5.7 and the default settings. Calling pep8 with other command line options or ...
8
votes
1answer
992 views

Palindromic prime

I'm solving task, where: Input: A number as an integer. Output: The closest greater palindromic prime as an integer. I would appreciate hints how to make my solution shorter. Or directions if ...
1
vote
10answers
1k views

Make a for loop repeat forever

for loops are useful in python in many ways, but one of the most common usages associated with a for loop is it's ability to repeat a certain amount of times. Like this: for times in range(50): ...
17
votes
7answers
1k views

How do I alias member functions in Python?

In Python, one can save bytes by aliasing functions that are used repeatedly. For example: r=range a=r(100) b=r(200) c=r(300) However, when the functions are member functions together, I don't know ...
14
votes
10answers
3k views

Crash (i.e. cause the interpreter to stop working and force close) Python

I would like to see who can make Python have a fatal crash with the most creative code. This means that when the program runs, Windows for example, will take over and pop up with something like “IDLE ...
-1
votes
1answer
247 views

Finding nCr for code-golf [duplicate]

The problem is to compute nCr = n!/(r!) * (n-r)! in the fewest characters possible. The input will be in the form: 1st line will have number of test cases and second line will have n and r for each ...
0
votes
0answers
64 views

Fastest way to generate Smarandache–Wellin number [duplicate]

Given a number n find the Smarandache–Wellin number for n. Ex: for n=2 output=23 for n=5 output=235711 Answer it in ruby or python. given constraints are n<=70000
3
votes
5answers
822 views

(Python) Implementing incrementation

Challenge: Implement incrementation without addition, multiplication, exponentiation, and any higher binary operators (and their opposites) in Python. Winner is the person who can do it in the least ...
1
vote
4answers
1k views

secret language hackerrank.com

I tried this contest: https://www.hackerrank.com/challenges/secret-language Well, the score in this contest said I made 30 out of 30 points. As the score is calculated with the formula 30*(1000-#chars)...
2
votes
1answer
2k views

shortest possible python pascal triangle code [duplicate]

the contest is already finished, so I don't think it's cheating to ask: I am trying to optimize this small contest: pascal triangle I started with 4.72 and worked myself up to 7.48. The best made a 9....
4
votes
3answers
1k views

Solve the CodeSprint4 Leibniz code golf challenge in Python in 66 characters

Check out this challenge: https://www.hackerrank.com/codesprint4/challenges/leibniz (The competition has already ended, so I'm just curious about the Python solution, which the organizers refused to ...
3
votes
2answers
688 views

Generate N number of “Go First” dice [closed]

Background As described here http://www.ericharshbarger.org/dice/#gofirst_4d12, "Go First" Dice is a set of four dice, each with unique numbering, so that: There will never be a tie. Each die has ...
1
vote
1answer
397 views

How can I make this program smaller? [closed]

I am trying my hand at writing super small programs. I wrote a simple "tree" display program for showing a graphical representation of a folder hierarchy. I have made it small in all the ways I can ...
-1
votes
2answers
240 views

Python Golfing - Narrow function calling on array down [closed]

Say i have a function named J and an array named f. now i call this code: result = [] for n in f: results.append(J(n)) is there any more efficient way of doing this? I was thinking something ...
12
votes
1answer
946 views

What is the minimum set of characters with which you can write any valid python program?

The proof of the set of characters is that there is a translator which takes any ascii python program as input and produces a limited character set version of the program. The limited character set ...
3
votes
3answers
3k views

List of paths to nested dictionary

Given a list of nested menu items, items = [ '3D/Axis', '3D/CameraTracker', 'Color/Invert', 'Color/Log2Lin', 'Color/Math/Add', 'Color/Math/Multiply', 'Other/Group', ...
4
votes
1answer
2k views

Shortest Way of creating a basic Space Invaders Game in Python

Hello all code golfers: Your challenge is to create a basic version of Space Invaders in Python Rules Program must be not written in Py3K All levels must be randomly generated There must be a HUD ...
0
votes
0answers
192 views

Python - Reverse Polish Notation [duplicate]

Possible Duplicate: Reverse Polish notation Create a function named rpn in python to evaluate a string written in Reverse Polish notation Numbers must be separated by one or more spaces; ...
3
votes
3answers
1k views

Fastest python implementation of multiplication table

I'd be interested to see who can come up with the fastest function to produce multiplication tables, in the following format: 1 2 3 4 5 6 7 8 9 10 11 12 2 4 6 8 10 12 ...