Questions tagged [python]
Python is an interpreted, general-purpose high-level programming language whose design philosophy emphasizes code readability. Use the python tag for all Python related questions. If you believe your question may be even more specific, you can include a version specific tag such as python-3.x.
1,580
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Let's register that Django user
Short intro
So, I've been using Django for a while now and thought it would be nice to start a simple application. In an ideal World, each app must have a way of letting its users register and that's ...
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Django on virtual machine - watching changes in static files and autocompiling LESS without inotify
I'm setting up a Django development environment using Vagrant to run an Ubuntu virtual machine on VirtualBox. As this is a student project run mostly by very amateur coders and I want everyone to be ...
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Sending notifications with Django channels
I have project on Django wich use Django Channels. I use Django Channel for sending notifications to users who are subscribed to articles changes (adding/editing/deleting comments on article).
So I'...
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Cyther: The Cross Platform Cython/Python Compiler (Take 2)
I recently posted an earlier version of this code on Code Review, and now with the given suggestions and many other improvements, I am back. I included the description of exactly what Cyther is ...
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Lisp-like language interpreter in Python
I decided to learn more about how interpreters work and made a simple Scheme interpreter in Python. I'd like to hear some advice on how I could have written this better, or on the mistakes I've made.
...
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Calculation of independence test statistic
This code (~30lines) detects independence between variables in a dataset, by using a bootstrap of a statistic. This is fully-broadcasted, but it's still long.
Reading it, or making it run, do you ...
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1
answer
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Joystick to mouse/keyboard mapping program
I've been working on a project to map a joystick (in my case Logitech Extreme 3D) to mouse and keyboard so I can use it for web games that don't support gamesticks. My design goals are:
Flexibility - ...
- 1,730
8
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1
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Improving the Flask cache decorator
In my rumblings developing flask applications I found the caching decorator. The decorator is a short and well-written piece of code, but I feel like it misses the few points bellow:
It only caches ...
user110810
7
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1
answer
193
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Python asyncio multithread wrapper
For my application, I needed a lightweight way to launch multiple tasks and monitor their completion in a main loop periodically or use callbacks. The main loop is going to be busy most of the time ...
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1
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GUI that reads data and generates/ saves charts
I have a program that uses pandas to read csv files and then generates and saves graphical charts. I have been trying to follow the SOLID principles so I have tried to seperate responsibilities.
So ...
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Pyspark Solver for Tiered Board Games
I've written a Pyspark program that will completely solve a tiered board game (no loops, each game position is a member of only one tier) and writes each tier to a file. It also determines the ...
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Structuring of my tkinter music player program
This music player app hasn't really completed yet but it runs the basic functions of a music player, which include play/pause, volume adjustment, next/prev, shuffle and repeat functionalities. However,...
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6
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189
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Pi Calculator Using BBP (Bailey–Borwein–Plouffe) - Written in Cython With MPFR
I wrote a Pi Calculator using the BBP Algorithm in Cython. My specific goals are make the code more legible and more performant. This is a purely academic script in order to teach me how to implement ...
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150
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stable producer/consumer threads in python
I have implemented a producer/consumer functionality using threads in a given framework and
I'm pretty sure I did not cover all possible scenarios.
I made a small reproducible version. Lines ending ...
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1
answer
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Algorithm Optimization -- Automatic Dimensionality of PCA
I have implemented (rather, edited the implementation of) a technique to automatically detect the optimal number of dimensions for PCA, based off of this paper.
This was inspired by ...
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6
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1
answer
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Sinewaves and FFT plotter
I am trying to code a sin wave with 5 sliders: frequency, amplitude, phase change, number of data points, and time. I am currently trying to link my phase change slider with my graph so that it ...
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Booking an East London Tennis Court
Description
I'm not sure if it Covid-19 but lately it is impossible to book a tennis court in my area on time. It's always full or maybe just don't check enough :)
To beat the queue and get notified ...
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6
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1
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Image puzzle PIL tkinter
I'm a hobbyist programmer(just having fun) created a small script that takes a photo and
resizes it, then cuts it up into 24 pieces. The chunks are transposed and made into buttons. Your task is to ...
- 186
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2
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129
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Get exactly `n` unique randomly sampled rows per category in a Dataframe
I want to get exactly n unique randomly sampled rows per category in a Dataframe. This proved to be involve more steps than the description would lead you to ...
- 161
6
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344
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Xero API Client in Django
I'm not actually that new to writing Python. But I've no formal training and have only learnt to build applications to solve problems for my job out of necessity. Starting to bring my existing skills ...
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6
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75
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Subtracting elements of datasets of an HDF5 file
I am trying to solve the following problem:
Input: Input is two arrays (Nx4, sorted in column-2) stored in datasets-1 and 2 in HDF5 file (input.h5). N is huge (...
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K nearest neighbours algorithm
Here is a project that I worked on for a few days in June 2020. Since the algorithm is extremely slow, I looked into methods in order to parallelize operations but did not obtain any satisfactory ...
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Python - Displaying messages in ArcPy/IDLE
I have created a wrapper for displaying messages with ArcPy and IDLE (as that is all I have available to myself due to certain circumstances) as I frequently use both to test and develop new tools. ...
user214684
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Cubic spline interpolation in Python from scratch
I implemented the cubic spline interpolation explained in
https://en.wikipedia.org/wiki/Spline_interpolation as a Python class. Of course, such an interpolation should exist already in some Python ...
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6
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971
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2048 AI in Python 3
I am working on an 2048 AI and this is my code so far.
In the game 2048 you have a 4x4 grid in that some random so named tiles spawn.
Each tile has a number. The lowest number is 2.
By using the left,...
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935
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Game involving catching falling items
This is my first game. Everything in the game was created by me during this week - from assets, music and, of course, code.
As I am new to Python I have wondered if the design template for this game ...
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228
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Speeding up the implementation of Stochastic Gradient Ascent in Python
I am implementing a time-dependent Recommender System which applies BPR (Bayesian Personalized Ranking), where Stochastic Gradient Ascent is used to learn the parameters of the model. Such that, one ...
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697
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Laminar flow in a pipe animation using Tkinter
I wrote this simple particle flow animation with Tkinter. I wanted to ask if there is some major improvements you can think of regarding the animation motor or the documentation of my code? I noticed ...
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6
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Selection sort with reduced comparison count: Python iteration 2
Follow up to Selection sort with reduced comparison count - semi-final Iteration?
My goal (and excuse not to tag reinventing…) is to have presentable code to argue the viability of reducing the number ...
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Example of multithreading in Python3 / PyQt5 using QThread
I wanted to make a simple example of multithreading with QThread in PyQt5 / Python3. The script generates a set of QLineEdits and buttons to start and stop a set of ...
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426
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Simple AR Tag classifier
I have been working on creating a simple AR Tag classifier, for detecting a simple AR Tag glyph. Spitting out an image that looks like this:
With the red circle indicating the corner closest to the ...
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76
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Elegant way to alter datasets with explicit filters
I would like to write a small helper to filter datasets. Each dataset is a dictionary and some filters I want to apply are common to all the datasets.
That my needs, I wrote this following pattern:
<...
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Real-time bitcoin data feed and storage using websocket framework
I'm trying to create data feed script for real time bitcoin data for OkCoin exchange using their websocket API (documentation) and a database manager for storing.
There are two channels I am ...
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37
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iChemistry - Learn chemistry with python
I decided to build a quiz type of game for improving chemistry linguistics using python. Currently there is not much variety in terms of questions, but before expanding the question base, I would like ...
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Message-free flow-oriented logger
Today, I've got a small FlowLogger for you to review. The idea is not to log pure messages, but focus on the flow of the app that might contain such items as:
<...
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5
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71
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A Python script that creates n-flakes
I have written a simple Python script that generates n-flakes using matplotlib.
Wikipedia article on N-flake.
I wrote two functions, one function generates pentaflake, the other generates hexaflake, I ...
- 1,726
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103
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A Python 3 script that generates art using matplotlib
I am always super interested in both science and art, science and art are two different ways to describe the objective reality, they are two sides of the same coin, in many areas they overlap, and ...
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@lazylist - Converts a Python Generator to a List without evaluating every element
Inspired by a blog I read, I made a LazyList class that can wrap an iterable (list, generator etc.) and turn it into a ...
- 2,315
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Thread Art Generation that Creates Embroidery Files
I have made a thread art generator that creates thread patterns from images. Mine is a bit different as it outputs an embroidery file (It embroiders quite nicely, though the settings need a lot of ...
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Scraping OddsPortal with requests only
This is a scraper written to do most of what had been attempted by another user in this question:
How can I optimise this webscraping code
I did the rewrite because I felt bad that the new user didn't ...
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228
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Process Injector using ctypes and the Windows API
To get some practice with the Windows API and ctypes, I decided to write a program capable of injecting and running shellcode inside of another specified process.
...
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Reading sensor data from serial device and publishing on MQTT
I have a weather station with a data logger which accepts commands (specified in user manual) and sends back the respective data over a serial interface. In my case, I want to read the current data ...
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2048 in Matplotlib
I did an OOP to make 2048 using Matplotlib visualization. The color dictionary is for setting different colors to each number in the game.
There are two classes ...
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1
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Approximation search source reconstruction localization algorithm
Goal
To determine the coordinates of some signal source in a 3D space, given the coordinates of four observers and the time at which each saw the signal, as well as the velocity of the signal.
...
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Text-based tic-tac-toe game in Python
I'm working on a text-based tic-tac-toe game, mostly for fun and because I'm learning programming. I would appreciate any comments you could give me to improve it.
Main structure:
Uses a Board class ...
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Python version of Clean Code book example
I started reading Robert Martin's Clean Code. I'm trying to "translate" all his examples into Python, so I can understand them better since my domain on Python is greater than on Java. ...
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safexl - A Python / pywin32 Excel Application wrapper
Thanks in advance for your interest in my first PyPI project.
While there happen to be a number of projects out there to help with creating & consuming Excel workbooks, I was unable to find one ...
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Machine Learning Implementation
I am new to ML and I wanted to implement a Linear Regression to predict a golfer's scores based on certain feature supplied to my model. I would like a review to see if I'm implementing this correctly ...
- 231
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598
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Selecting child contours in OpenCV
I'm really new to OpenCV. :) I have been working on this for almost an entire day. After hours of sleepless work I would like to know if I can further improve my code.
I have written some code to ...