Questions tagged [python-2.x]
Python 2 is the predecessor of Python 3 and its last version, Python 2.7 was formally released on July 3, 2010. Use this tag along with the main python tag to denote programs that are meant to be run on a Python 2 interpreter only. Do not mix this tag with the python-3.x tag.
1,236
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Monopoly simulator
I was advised by a Reddit user to get my code reviewed on this site.
The complete code is on GitHub.
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6
answers
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Accurate email syntax validation (no seriously)
So a friend happened to show me how odd and specific the general email syntax rules are. For instance, emails can have "comments". Basically you can put characters in parentheses that are just ignored....
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The right way to hang a man
Problem:
I have seen a few questions around hangman. Usually this is done in a very hackish way, which usually can not be generalized any further. My thought or question is about the creation of the ...
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Someone thinks poorly of my server log parser
I have just been informed that the following code written by me is extremely poor. I have absolutely no idea why. It is memory efficient, and looks clean to me. But still the feedback is very poor. I ...
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Search for a multiword string in a list of strings
Unlike Perl, you can't to my knowledge match a regular expression inside an if statement in Python and assign the result to a variable at the same moment. This ...
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Password checker in Python
Using Python 2.7.12 I wrote a simple little script, psk_validate.py, that prompts the user for a potential password and checks if it has upper and lower-case ...
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Project Euler #1: Multiples of 3 and 5
Challenge Description:
If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
Find the sum of all the multiples of ...
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Replacing letters with numbers with its position in alphabet
If anything in the text isn't a letter, ignore it and don't return it.
a being 1, b ...
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6
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Python code to retry function
I am trying to write a python function which retries a given function until given time or function returns True with given delay.
I have written the following function, but was thinking if there is ...
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3
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"The python that ate a calculator"
In a YouTube video I watched, the speaker said it is important to know how to calculate between numbers of different bases; i.e. two, ten, and sixteen. I was then inspired to write a small C program ...
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4
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Validating Credit Card Numbers
This is one of the puzzles I was trying to solve, where the question is to validate the credit card number with following characteristics:
It must contain exactly 16 digits.
It must start ...
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Simple random number generator
I have been wanting to learn programming for some time now and decided to really give it a shot today. I have edited and read lots of things in Java to fix small issues but never written from scratch. ...
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When it rains, it pours - August 2016 Community Challenge
1. Introduction
This code is my attempt at solving the August 2016 Community Challenge. Coming from a city where it rains cats and dogs on a daily basis this challenge was right up my alley =)
2. ...
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Check if a Sudoku board is filled out correctly
The code below takes a filled out Sudoku board of size NxN, with sub-blocks of nxn, and checks if the solution is correct.
main_function takes a board as input. ...
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4
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Monty Hall Simulation
I wrote this code as my first self-directed effort and would appreciate any input on things that I've done seriously wrong. I worry that perhaps I'm over-relying on ...
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Python - Minesweeper
I'm new to Python (and generally to programming), and I have recently written this Minesweeper game:
...
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4
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Regex to parse semicolon-delimited fields is too slow
I have a file with just 3500 lines like these:
filecontent= "13P397;Fotostuff;t;IBM;IBM lalala 123|IBM lalala 1234;28.000 things;;IBMlalala123|IBMlalala1234"
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1
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Raspberry PI controllable Christmas Tree
After having the scales, thermometer and a coffeemaker connected to the internet, it is finally time for Christmas Tree to become smarter.
Hardware
6ft Christmas Tree
An addressable WS2811 LED strip (...
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Check if a number N is a power of K
I was asked this question in interview:
Check if a number N is a power of K.
Example:
N = 32, K = 2 => True
N = 40, K = 5 => False
I wrote following code but got the feedback that, complexity ...
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1
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Messed up Elevator Management System
In light of our current community-challenge I decided to build an Elevator Management System.
Initially I intended to program the EMS like a real-time operating system and the elevators as finite-...
Mast♦
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1
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Rainfall - August 2016 Community Challenge (Hooray for graphs!)
A solution for the August 2016 Community Challenge (Rainfall).
I've intentionally left out error checking on the file formatting.
This seems like a very obvious graph problem to me - we want to ...
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Get value from dictionary given a list of nested keys
I would like to get a deeply-nested value, for example {"a":{"b":{"c":"myValue"}} by providing the keys to traverse. I tried chaining together .get() but that didn'...
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Pythonic way to add each previous element in list
It's a very simple question, but I wonder if there is a more pythonic way to add each previous elements in a list like this (for example with a list comprehension maybe) :
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Python preprocesser that allows "until" and "unless" statements
I've implemented the beginnings of a Python preprocesser I plan to implement sometime in the future, and the below code is my simple prototype. At the moment, it only converts ...
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Given a page of content, determine shortest snippet containing all search phrases (no order required)
A recruiter gave me a homework problem as a part of the recruiting process and after receiving my submission he told me that he decided not to proceed with me. When I asked for the reason, he told me ...
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Decorator to measure execution time of a function
This decorator adds the elapsed time to a function's attributes when applied.
My concerns:
Is the code pythonic?
Could this code be useful?
Should I just use the ...
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votes
4
answers
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Google Foobar Challenge: Lucky Triples
Note: Since my time has passed for this challenge, I do not remember exactly the stipulations but will attempt to recapitulate them to the best of my knowledge.
Essentially, the challenge was this:
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3
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Splitting a list by indexes
I am trying to build an efficient function for splitting a list of any size by any given number of indices. This method works and it took me a few hours to get it right (I hate how easy it is to get ...
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3
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My images have secrets A.K.A. the making of aesthetic passwords
This is my implementation of a prng steganography tool written in Python. You can also find the code on GitHub.
Steganography is the art of hiding messages in (images, videos or even audio)
I've ...
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4
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From Q to compiler in less than 30 seconds
(See the newer version here: CodeReview question markdown downloader)
As an adjunct to From new Q to compiler in 30 seconds, I've created a Python script to automatically download the markdown from ...
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Virtual machine management with decorated selfies
I have a class which provides various methods for retrieving information from a VMware vSphere environment.
Over the time my class got extended and became large, so I thought I should spend some ...
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Reading a DHT11 to a file
Disclaimer: not a Pythonista, first actual Python programme written right here.
I'm reading a DHT11 sensor from GPIO pin 4 on my Raspberry Pi (thanks Thomas Ward for sending the RPi to me), and I ...
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O PC, why are you so slow?
In order to test some software I've written, I need to write values to a test harness with OLE for Process Control (OPC). The problem is, for a larger range of values I'm generating points for (say ...
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Codechef: Prime Number Generator
Peter wants to generate some prime numbers for his cryptosystem. Help
him! Your task is to generate all prime numbers between two given
numbers!
Input
The input begins with the number t of test cases ...
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Find my colleagues
I recently finished the Using Databases with Python course. To figure out whether I really understood what was being taught, I build an application which does roughly the same but uses a different ...
Mast♦
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Implementing heap in Python
This is basically a straightforward heap implementation. I am just moving from C to Python and I wanted to make sure that I follow Python's best practices in general. This heap is supposed to support ...
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Sudoku Puzzle Generator
I've written a Sudoku puzzle generator. It currently runs through each line of the 9x9 grid and places numbers randomly if they're valid. It loops over all the numbers from 1-9 and then if it finds ...
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Lexer for C- in Python
I am currently taking a compilers course where we are designing a compiler for C- (which is a subset of C). Our first step was the lexer and I have written that but I believe that it is not very "...
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Character creator for a role-playing game
Goal:
Write a character creator program for a role-playing game. The player
should be given a pool of 30 points to spend on four attributes:
strength, health, wisdom, and dexterity. The ...
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Farthest point algorithm in Python
I am learning Python and I tried to do a program to find K points from a set of N points, farthest as much as possible (I'm not ...
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Racetrack plotter
My Racetrack is just that. A Racetrack. You can't race it (yet) because I had trouble with collision detection, but I wanted to share it anyway.
It creates a base polygon by using ...
Mast♦
- 13k
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Download images from an image board based on tags and blacklists
This code is meant to download images from an image board to create a local backup. Images are grouped by tags selected by the user and then downloaded using multiprocessing. Normal use of this ...
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Stone, Paper, Scissors in Python
Recently I started programming with python.
Today I was trying to make a stone, paper, scissor game. After so scratching my head long time, finally I got a working code.
...
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Optimizing an Anagram Solver
I've built an anagram solver in Python 2.7. It goes through a text file with over 100,000 words and checks if any permutations of the input matches the line. It works great, except it is very slow. I'...
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#TODO Remove duplication in XML parsing
I have to modify the number of points in this XML in order to test the performance of another program of mine. Here is an example of the XML I have to modify.
performance.xml:
...
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Faster computation of barycentric coordinates for many points
I'm just starting to understand the Python syntax and I created a module that does what I wanted, but really slow.
Here are the stats of cProfile, top 10 ordered by ...
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Optimizing "Poker hands" challenge solution
I'm trying to solve the project Euler problem 54.
In the card game poker, a hand consists of five cards and are ranked, from lowest to highest, in the following way:
High Card: Highest ...
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A classy DNA nucleobase counter
This question is part of a series solving the Rosalind challenges. For the previous question in this series, see Counting nucleobases in a nucleotide c. The repository with all my up-to-date solutions ...
Mast♦
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Voting plugin for an IRC bot
MetaBrainz has an IRC channel called #metabrainz on which there's a bot called BrainzBot running. It provides utilities such as linking to JIRA issues or Github PRs ...
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