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When I need to convert a batch of JPG images, opening each file and saving it manually quickly becomes repetitive. A small Python application makes this much easier, especially when you need to process several images at once. For this project, I built a JPG to PNG Converter using Python with Streamlit for the interface … Read more >>
When I build small file-processing tools or work with API payloads, I often need to change binary data before saving or sending it. A regular Python string will not help because strings store text and do not allow changes in place. Even bytes objects stay fixed after creation. That is where the Python bytearray() function … Read more >>
Stuck on a value that looks wrong halfway through a function? Drop in the Python breakpoint() function: it pauses the script at that line and opens pdb, the built-in debugger, so you can print variables and step forward. No import is needed: I ran the debugger sessions below in Command Prompt on Python 3.12.5 and … Read more >>
When I build small reporting scripts, one common job is deciding whether the script should continue. Does the CSV contain rows? Did the API return data? Did a user enter a value? The Python bool() function gives a clean, reliable answer: True or False. You will use bool() constantly in if statements, loops, input checks, … Read more >>
The Python ceil() function rounds a number up to the nearest whole number. It lives in the math module, so you call it as math.ceil(x) after import math: math.ceil(2.1) gives 3, and math.ceil(-2.8) gives -2, because up means towards positive infinity. It always returns an int, never a float. This guide covers the ceiling function … Read more >>
As a Python developer, I often work with screenshots, product images, blog images, and photographs that need to be uploaded to websites or shared online. Large image files can slow down websites, consume storage, and make file sharing inconvenient. To solve this problem, I built an Image Compressor using Python and Streamlit. This tool allows … Read more >>
When I work with scanned documents, screenshots, receipts, or batches of photos, converting each image manually into a PDF quickly becomes repetitive. A small Python desktop application solves that problem nicely. For this project, I wanted more than a simple image-to-PDF script. The application needs a graphical user interface, multiple image selection, image ordering, validation, … Read more >>
Need the bits behind a number? The Python bin() function takes an integer and gives back its binary form as a string that starts with 0b. Negative numbers get a minus sign in front, and floats raise a TypeError: Every output below comes from Command Prompt runs on Python 3.12.5, copied as printed. In this … Read more >>
A customer-name cleanup script looks fine until someone enters “José”, “Megan O’Connor”, or an emoji in a notes field. When you print the value, terminals, log files, and API payloads do not always show those characters the same way. I have used Python’s ascii() function most often while debugging text pulled from CSV files, APIs, and form … Read more >>
The Python any() function returns True when at least one item in an iterable is truthy, and False when none is, including when the iterable is empty. Pair it with a generator expression to ask “does anything here match?” in one line: I ran every example on this page on Python 3.12.5 in Command Prompt, … Read more >>