Remove Empty Keys from a Python Dictionary

removing keys from dictionary python

As a developer, I was working on a data-cleaning project where I had to process a large JSON dataset from an API. The dataset represented customer information, but many records contained empty keys that served no purpose. If you’ve ever worked with dictionaries in Python, you know they’re one of the most powerful data structures. … Read more >>

How I Check If a List Contains a Sublist in Python

python find sublist in list

Recently, I was working on a data-cleaning project where I had to verify if a smaller list of values existed inside a larger dataset. At first, I thought Python might have a direct built-in method for this. But just like in Excel, where you don’t always get a direct option (for example, filtering strikethrough text), … Read more >>

Python Increment and Decrement by 1

Increment Operator in Python

When I first started coding in Python more than a decade ago, I often wondered why there wasn’t a built-in increment (++) or decrement (–) operator like in C or Java. If you’re new to Python, this can feel confusing at first. But don’t worry: Python makes this process simple and flexible with its own … Read more >>

Call by Value vs Call by Reference in Python

python passing by reference

I was working with a team of data analysts in New York. We were optimizing some Python functions that handled large datasets. During the review, one of the junior developers asked me: “Does Python use call by value or call by reference?” This is a common question. I’ve been coding in Python for more than … Read more >>

Write a Program to Find a Perfect Number in Python

perfect number in python

Recently, I was working on a small project where I needed to check if a number was a perfect number. At first, I thought Python might have a built-in function for this. But just like Excel doesn’t have a direct way to filter strikethrough cells, Python doesn’t come with a ready-made tool for perfect numbers. … Read more >>

Python Program to Calculate the Area of a Rectangle

write a program to find area of rectangle in python

When I first started teaching Python to beginners, one of the most common questions I got was: How do I calculate the area of a rectangle It’s a simple problem, but it’s also one of the best ways to understand how Python handles inputs, variables, and basic arithmetic. In this tutorial, I’ll show you step … Read more >>

Lambda in List Comprehension in Python

python list comprehension lambda

I was working on a data-cleaning task where I had to transform and filter a list of U.S. city names. I wanted a quick way to apply conditions and transformations without writing long functions. That’s when lambda with list comprehension came in handy. This combination gave me cleaner, more Pythonic code. In this tutorial, I’ll … Read more >>

Remove Special Characters From a String in Python

remove special characters except for space from a string in Python

Recently, I was working on cleaning up some text data for a project in the USA, where customer feedback was collected through multiple online forms. The issue? Many users typed in special characters like @, #, !, and %, which made the data messy and hard to analyze. But I noticed that I still needed … Read more >>

Get the Index of the Minimum Element in a Python List

Get the Index of the Minimum Element of a List in Python

I was working on a project where I had to find the position of the smallest number in a list. At first, I thought it would be simple. But then I realized there are multiple ways to do this in Python, each with its own advantages. In this tutorial, I’ll show you five simple methods … Read more >>

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