#Approach 1: Iterative Approach to Reverse Linked List Test Cases: # Example 1 linked_list = Solution() linked_list.push(5) linked_list.push(4) linked_list.push(3) linked_list.push(2) linked_list.push(1) Output: Given linked list 1 2 3 4 5 Reversed linked list 5 4 3 2 1 # Example 2 linked_list = Solution() linked_list.push(5) linked_list.push(4) linked_list.push(3) linked_list.push(2) linked_list.push(1) Output: Given linked list 1 2 … Read more
From teaching hundreds of thousands of students Python, I found this error to be a classic. I think understanding classes is hard enough, but many coders who’ve just started to learn about Python are rightly confused ? about the TypeError that complains about too few positional arguments. Let’s resolve this confusion once and for all, … Read more
I love tweaking my coding workflow. Small improvements accumulate over time and can lead to a massive productivity increase. Today, I caught myself being annoyed that I always needed to spend three clicks or so just to open a Python file in IDLE, the default Python editor on Windows. Time to change that! Do you … Read more
Windows normally installs Python on one of the two locations: C:\Python39 C:\Users\YourUser\AppData\Local\Programs\Python\Python39 For me, it’s the latter. For you, it may be different—this article shows you how to check for yourself! 🙂 For your convenience, I’ve made a short gif that shows how I rushed through the code on my Windows machine: Before you start, … Read more
Today we’re going to look at the Python Method Resolution Order or MRO for short. If you’ve been following the tutorials on Python classes and inheritance, and you’ve been practicing in code, you’ll understand that once the hierarchy of classes moves into multiple inheritances, you may return strange results or end up with incomprehensible errors. … Read more
[toc] Introduction A Python dictionary stores data in the form of key-value pairs. A dictionary in Python is ordered, mutable and does not allow duplicates. The keys in the dictionary are paired with the values by using a colon (:) while the commas fill in as a separator for the pairs. The values can be the same but … Read more
Python’s or operator performs the logical OR operation that returns True if at least one of the operands evaluates to True. The operator performs an optimization called short-circuiting, so if the first operand evaluates to True, it returns the first right away without further evaluating the second, and if the first operand evaluates to False, … Read more
Introduction Before diving into the solutions to our question, here’s a quick recap of Python dictionaries. In Python, a dictionary is a collection of objects. A Python dictionary stores data in the form of key-value pairs. A dictionary in Python is ordered, changeable and does not allow duplicates. The keys in the dictionary are paired … Read more
Introduction Lists are the built-in data type in Python used to store items in an ordered sequence. You will definitely use lists in most of your projects if you are programming in Python. So take your time and invest a good hour or so to study this guide carefully. Note: In Python, list elements start … Read more
Python’s and operator performs the logical AND operation that returns True if both operands evaluate to True. The operator performs an optimization called short-circuiting, so if the first operand evaluates to True, it returns the second operand; and if the first operand evaluates to False, it returns False without further evaluating the second operand. As … Read more
[toc] ?️ Asked in: Google, Facebook, Amazon Are you terrified of being asked this question in an interview? Don’t worry! You are not alone. Many people found it intimidating. Unfortunately, the probability of seeing it at least once is quite high if you are undergoing a lot of interviews. Many interviewee’s have claimed that they … Read more
Problem Formulation: How to Test if String Starts With Any Prefix From an Iterable? Given a string and multiple string prefixes in an iterable such as a list or a tuple. How to test whether the string starts with any of the provided prefixes? Here are three examples: s = ‘hello world’ prefixes = [‘hi’, … Read more