Working on a Python data visualization project, I needed to save a Matplotlib plot with a transparent background. I was preparing a presentation for a U.S.-based client, and the slides had a dark theme. When I added my regular Matplotlib chart, it looked odd with a white background. That’s when I realized, Matplotlib actually makes … Read more >>
As a developer with over a decade of experience in web technologies, I often turn to React when I need to build interactive front-end experiences. Recently, I needed a Tree View component for a dashboard project, one that could display hierarchical data, such as folders and files, in a clean, collapsible way. If you’ve ever … Read more >>
In my years of working with data visualization, I have found that a default white background rarely fits a professional dashboard. A well-chosen background color makes your Python Matplotlib pie charts pop and aligns them with your brand’s aesthetic. In this tutorial, I will demonstrate how to manipulate the background colors of your pie charts … Read more >>
Changing the text of a label is one of the most common tasks you will face when building a desktop application with Python. I remember when I first started using Tkinter; I thought I had to destroy the label and create a new one every time the data changed. It took me a while to … Read more >>
To change the background color in Matplotlib, set the facecolor: ax.set_facecolor(“lightyellow”) colours the plot area inside the axes, and fig.set_facecolor(“lightblue”) (or plt.figure(facecolor=…)) colours the figure around it. To change the default background color for every plot, set plt.rcParams[“axes.facecolor”] and plt.rcParams[“figure.facecolor”]. This guide covers all of these, plus dark mode with dark_background, transparent PNGs, subplots, the … Read more >>
To find the first number in a string in Python, use re.search(r”\d+”, text). It returns the first run of digits, or None if the string has no digits, so always check the match before calling .group(). Below: a reusable function, versions without regex, how to handle negative numbers, decimals and thousands separators, and a few … Read more >>
To get the last digit of a number in Python, use the modulo operator: number % 10. To get the first digit of a number in Python, convert it to a string and take the first character: int(str(number)[0]). Both work for any size of integer; use abs() first if the number can be negative. This … Read more >>
Recently, while working on a Python data visualization project for a US-based retail analytics company, I needed to export a summary table created with Matplotlib into a clean, printable PDF format. At first, I assumed there would be a direct function in Matplotlib to save tables as PDFs, but I quickly realized that the process … Read more >>
Mastering Tkinter can open doors to creating practical and interactive desktop applications in Python. Many employers value this skill because it shows strong problem-solving and GUI development abilities. This article covers 51 Tkinter interview questions and answers designed to strengthen understanding and build confidence before stepping into a technical interview. It provides a clear guide … Read more >>
Working on a Python data visualization project where I needed to generate multiple charts and share them with my team in a single, printable PDF file. I tried saving each Matplotlib plot separately, but managing and sending multiple files quickly became messy. That’s when I discovered a simple and powerful way to save multiple Matplotlib … Read more >>