If there is one subject in Python that creates confusion, it is that of generators. Generators are functions, but they have several differences from the ordinary functions you and I use daily. Today, we’ll be taking a gentle immersion into the world of generators to understand what they are, how they differ from ordinary functions, … Read more
Problem Formulation Given a string containing digits such as ‘123.456’. How to convert it to a double in Python such as 123.456? Solution Python doesn’t provide an explicit “double” data type. However, it provides the float type that behaves the same and has the same precision as doubles in C, C++, or Java. To convert … Read more
The main difference between type() and isinstance() is that type(object) returns the type of an object and isinstance(object, class) returns True if the object argument is an instance of the class argument or in a direct or indirect subclass relationship. To strengthen your understanding, let’s quickly recap the syntactical definitions of both functions: type(object) – … Read more
[toc] Introduction Problem Formulation: Given a floating-point value. How to limit it to two decimal places in Python? Example: Let’s have a look at a program where you have to calculate the value of pi. Output: Perfect! pi yields you a value = 3.141592653589793. But, what if you need the value of pi only up … Read more
[toc] Problem: Given an iterable, how to print it using a for loop within a lambda function. Overview In this tutorial, we will learn why it is not a smart idea to use for loop inside Lambda in Python. This is a frequently asked question by programmers and newbies. Hence, it needs to be addressed … Read more
What Are Python Operators? Python operators are special syntactical sugar to run basic operations without calling their respective methods. For example, you can use the + operator in a + b instead of the more clunky .add() method in a.add(b). Each operator has a unique symbol that is placed between the two arguments called operands. … Read more
Have you stumbled upon the strange-looking Python operator A |= B in a code snippet and you don’t know what it means? This article will clarify it once and for all! Let’s start with the short answer: Python’s A |= B applies the | operator in place. Thus, it is semantically identical to the longer-form … Read more
Problem Formulation: Given a string my_string. Find the number of characters of the string! For example, the string “what is my length?” must yield integer 18 because it has 18 characters. Here are three examples of our desired outputs: Solution: Before we dive into alternatives, here’s the quick answer to this question. To get the … Read more
This tutorial explores the ways one can check if a variable is a class. The direct way to check if a variable is a class, is to use the isclass() runtime service, from Python’s inspect module. Use isclass() in conjunction with Python’s isinstance() built-in function, to examine a variable. Both of these return a Boolean … Read more
A common problem people often run up against in Python is understanding a method to sort one list based on the values in another. There are many solutions to this but I will select three main methods, one of which uses well-understood Python built-in functions such as zip() and sorted(). One will use the dictionary … Read more
Summary: This blog explains the ways to apply a given function to each element of a list. The best way to apply a function to each element of a list is to use the Python built-in map() function that takes a function and one or more iterables as arguments. It then applies the function to … Read more
[toc] Quick Fix: Python’s built-in str(x) method converts an integer object x to a string object by using the x.__str__() method. ❖ Introduction Problem Formulation: Given a string object in Python, what are the ways to convert it to an Integer type? Example: Output: Let us have a look at an example where converting an … Read more