ChrisFlatten to a 1D NumPy Array To flatten any NumPy array to a one-dimensional array, use the array.flatten() method that returns a new flattened 1D array. Here’s a simple example: Flatten NumPy Array Along Axis with reshape() To “flatten” a NumPy array along an axis, it’s often better to use the array.reshape() function. You can … Read more
💬 Challenge: Given a Pandas DataFrame. How to find the longest string in a given DataFrame column? We’re going to discuss different variants of this problem next. Let’s get started with the easiest next! Method 1: Find Length of Longest String in DataFrame Column To find the length of the longest string in a DataFrame … Read more
The Python return keyword allows you to define the return value of a function (e.g., return X). If you don’t explicitly set a return value or you omit the return statement, Python will implicitly return the following default value: None. There are three cases of what a function can return: Case 1: The function has … Read more
Coding Challenge 💬 Challenge: Given a string. How to find all palindromes in the string? For comprehensibility, allow me to quickly add a definition of the term palindrome: 💡 Definition: A palindrome is a sequence of characters that reads the same backward as forward such as ‘madam’, ‘anna’, or ‘101’. This article wants to give … Read more
Problem: Given a dictionary and a filter condition. How to filter a dictionary by … … key so that only those (key, value) pairs in the dictionary remain where the key satisfies the condition? … value so that only those (key, value) pairs remain where the value satisfies the condition? In this tutorial, you’ll learn … Read more
Coding Challenge 💬 Challenge: Given a string. How to find the longest palindrome in the string? For comprehensibility, allow me to quickly add a definition of the term palindrome: 💡 Definition: A palindrome is a sequence of characters that reads the same backward as forward such as ‘madam’, ‘anna’, or ‘101’. This article wants to … Read more
There are three main ways to check if a set is empty: Implicit: Pass the set into a Boolean context without modification. Python will automatically convert it to a Boolean using bool(). Explicit: Pass the set into the bool() Function. Comparison: Compare the set with the empty set like so: my_set == set() Let’s dive … Read more
Use Python’s built-in max() function with the key argument to find the longest string in a set. Call max(my_set, key=len) to return the longest string in the set using the built-in len() function to determine the weight of each string—the longest string has maximum length. 👉 Recommended Tutorial: How to Find the Longest String in … Read more
Coding Challenge 💬 Challenge: How to Find the Longest Line or String From a File in Python? Given the following text file: Depending on what exactly you’re looking for, you want to find the longest string word (A) or the longest line (B) in the file. Let’s dive into both variants next. Method 1: Find … Read more
You’ll never guess the most concise way to solve this problem… 🦄 Coding Challenge 💬 Challenge: Given a dictionary with string keys. Get the string key with the maximum number of characters, i.e., the longest string. A variant of this problem is to get the length of the longest string — I’ll give you a … Read more
Problem Formulation 💬 Challenge: Given a Python list of strings and a query string. Find the strings that partially match the query string. Example 1: Input: [‘hello’, ‘world’, ‘python’] and ‘pyth’ Output: [‘python’] Example 2: Input: [‘aaa’, ‘aa’, ‘a’] and ‘a’ Output: [‘aaa’, ‘aa’, ‘a’] Example 3: Input: [‘aaa’, ‘aa’, ‘a’] and ‘b’ Output: [] … Read more
Minimal Error Example Given the following minimal example where you create a set and attempt to access an element of this set using indexing or slicing: If you run this code snippet, Python raises the TypeError: ‘set’ object is not subscriptable: Why Does the Error Occur? The Python TypeError: ‘set’ object is not subscriptable occurs … Read more