In Python, “dunder” methods, short for “double underscore” methods, are special methods that allow developers to define the behavior of built-in operations for custom objects. For instance, when you use the + operator to add two objects, Python internally calls the __add__ method. Similarly, other operators have their corresponding dunder methods. However, the term “not … Read more
Understanding Boolean Operators Boolean operators in Python help you create conditional statements to control the flow of your program. Python provides three basic Boolean operators: and, or, and not. These operators help you construct sophisticated expressions to evaluate the truth or falsity of different conditions. And Operator The and operator returns True if both of … Read more
💬 Question: What is the difference between Python’s is and == operators? Answer The Python “==” operator compares equality of values whereas the Python “is” operator compares identity of objects, i.e., do the two operands point to the same object in memory. For example, the expression [1, 2, 3] == [1, 2, 3] returns True … Read more
Problem Formulation You have been given a number. How will you check if the number lies between two numbers? When you check if a number lies between two other numbers it returns a boolean that determines if the number is greater than or equal to the minimum number and also less than or equal to … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to repeat a string multiple times in Python. Over your career as a Python coder, you will encounter situations when a string needs to be output/displayed a specified number of times. The examples below offer you various ways to accomplish this task. 💬 Question: … Read more
In Python, the equivalent of && (logical-and) in programming languages such as C++ or Java in an if-statement is and. Using && will raise a SyntaxError, so use and instead! Overview Problem: What is the equivalent of &&(logical-and) in Python? Example: Let’s have a look at the following example: Output: You will get the following … Read more
The Python class.__init_subclass__(cls) method is called on a given class each time a subclass cls for that class is created. Syntax class.__init_subclass__(cls) We call this a “Dunder Method” for “Double Underscore Method” (also called “magic method”). To get a list of all dunder methods with explanation, check out our dunder cheat sheet article on this … Read more
Syntax class.__subclasscheck__(self, subclass) Python’s class.__subclasscheck__(self, subclass) method implements the issubclass(subclass, class) built-in function. It should return True if subclass is a direct or indirect subclass of class using Python inheritance to define the subclass relationship. We call this a “Dunder Method” for “Double Underscore Method” (also called “magic method”). To get a list of all … Read more
Syntax object.__sizeof__(self, other) The Python __sizeof__() method returns the size of the object in bytes. The sys.getsizeof() method internally call’s __sizeof__() and adds some additional byte overhead, e.g., for garbage collection. Basic Example The following code snippet creates a list object x with three integers and measures its size in bytes (104) using the x.__sizeof__() … Read more
Python’s __reversed__ magic method implements the reversed() built-in function that returns a reverse iterator over the values of the given sequence such as a list, a tuple, or a string. Syntax __reversed__(self) Let’s have a look at an example next. Example In the following code, you create a Person class with one name attribute. The … Read more
Syntax and Definition object.__trunc__(self) The Python __trunc__() method implements the behavior of the math.trunc() function. For example, if you attempt to call math.trunc(x), Python will run the x.__trunc__() method to obtain the return value. We call this a “Dunder Method” for “Double Underscore Method” (also called “magic method”). To get a list of all dunder … Read more
Syntax and Definition object.__floor__(self) The Python __floor__() method implements the behavior of the math.floor() function. For example, if you attempt to call math.floor(x), Python will run the x.__floor__() method to obtain the return value. We call this a “Dunder Method” for “Double Underscore Method” (also called “magic method”). To get a list of all dunder … Read more