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Python

Running shell command and capturing the output

August 22, 2022 by Magenaut

I want to write a function that will execute a shell command and return its output as a string, no matter, is it an error or success message. I just want to get the same result that I would have gotten with the command line.

Categories Python, Q&A Tags python, shell, subprocess Leave a comment

Check if a given key already exists in a dictionary

August 22, 2022 by Magenaut

Check if a given key already exists in a dictionary

Categories Python, Q&A Tags dictionary, python Leave a comment

Syntax error on print with Python 3

August 22, 2022 by Magenaut

Why do I receive a syntax error when printing a string in Python 3? >>> print "hello World" File "<stdin>", line 1 print "hello World" ^ SyntaxError: invalid syntax Answers: Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please … Read more

Categories Python, Q&A Tags python, python-3.x Leave a comment

Pygame window not responding after a few seconds

August 22, 2022 by Magenaut

This simple piece of code crashes (the window is not responding) after a few seconds (around 5).

Categories Python, Q&A Tags pygame, python Leave a comment

Why can’t I call read() twice on an open file?

August 22, 2022 by Magenaut

For an exercise I’m doing, I’m trying to read the contents of a given file twice using the read() method. Strangely, when I call it the second time, it doesn’t seem to return the file content as a string?

Categories Python, Q&A Tags io, python Leave a comment

Why is __init__() always called after __new__()?

August 22, 2022 by Magenaut

I’m just trying to streamline one of my classes and have introduced some functionality in the same style as the flyweight design pattern.

Categories Python, Q&A Tags class-design, design-patterns, python Leave a comment

How to parse data in JSON format?

August 22, 2022 by Magenaut

My project is currently receiving a JSON message in python which I need to get bits of information out of. For the purposes of this, let’s set it to some simple JSON in a string:

Categories Python, Q&A Tags json, parsing, python Leave a comment

Decode HTML entities in Python string?

August 22, 2022 by Magenaut

I’m parsing some HTML with Beautiful Soup 3, but it contains HTML entities which Beautiful Soup 3 doesn’t automatically decode for me:

Categories Python, Q&A Tags html, html-entities, python Leave a comment

How do I concatenate items in a list to a single string?

August 22, 2022 by Magenaut

How do I concatenate a list of strings into a single string?

Categories Python, Q&A Tags concatenation, list, python, string Leave a comment

What do lambda function closures capture?

August 22, 2022 by Magenaut

Recently I started playing around with Python and I came around something peculiar in the way closures work. Consider the following code:

Categories Python, Q&A Tags closures, lambda, python Leave a comment
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  1. michealSmith07 on Is there a way to dynamically refresh the less command?August 21, 2022

    That is a very nice post. I like this post.

  2. anonymous on Fix libwacom9 dependency issue when upgrade DebianJune 27, 2022

    saved my day!! Thanks for the help…

  3. sreedhar on Fix libwacom9 dependency issue when upgrade DebianMay 10, 2022

    Thanks its working

  4. saintnick on Fix libwacom9 dependency issue when upgrade DebianMay 10, 2022

    remove libwacom2 worked for me as well

  5. ranafoul on Fix libwacom9 dependency issue when upgrade DebianApril 22, 2022

    apt remove libwacom2 helped on kali 2022.01. gr8

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