This challenge is related to the Python language. Note that challenges that require the answers to be in a specific language are generally discouraged.
-3
votes
0answers
83 views
Data Visualization [closed]
The overall task will involve extracting market data for various trading instruments (represented by unique symbols), applying some transformations and statistical functions, and displaying the ...
12
votes
4answers
345 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
198 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
171 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 ...
2
votes
3answers
231 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
161 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"
...
4
votes
5answers
261 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 ...
10
votes
1answer
350 views
Write a panic script to remote secure a Mac Pro from an untrustworthy local user
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
519 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)
...
0
votes
1answer
76 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
149 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 ...
12
votes
3answers
901 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:
...
7
votes
2answers
370 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
217 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
499 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
464 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 ...
9
votes
1answer
825 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 ...
-1
votes
1answer
172 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
477 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 ...
7
votes
3answers
468 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 ...
27
votes
7answers
4k views
Golf Practice: Python
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
205 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
592 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
130 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
20k 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
690 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
943 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):
...
15
votes
7answers
902 views
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
11answers
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 ...
3
votes
2answers
422 views
Violate all stylistic requirements of PEP8
In Python, the style guide PEP 8 defines the coding style for all Python code. Your task is, in as few characters as possible, to write a program that violates all those requirements and can still be ...
-1
votes
1answer
234 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
789 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
959 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 ...
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 ...
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
682 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
387 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
237 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
920 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
2k 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
184 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 ...
13
votes
2answers
1k views
Fastest python code to find a set of winning words in this game
This is a word game from a set of activity cards for children. Below the rules is code to find the best triplet using /usr/share/dict/words. I thought it was an interesting optimization problem, and ...
