In Python, a list is a built-in data structure that represents an ordered, mutable (changeable), and heterogeneous (can contain different data types) collection of elements. Lists are one of the most commonly used data structures in Python due to their flexibility and dynamic nature. Definition of a List in Python: Example: python my_list = [1, “hello”, 3.14,…
C-Style String Formatting in Python Python supports C-style string formatting using the % operator, which provides similar functionality to C’s printf() function. This method is sometimes called “old-style” string formatting but remains useful in many scenarios. Basic Syntax python “format string” % (values) Control Characters (Format Specifiers) Format Specifier Description Example Output %s String “%s” % “hello” hello %d…
The print() Function in Python: Complete Guide The print() function is Python’s built-in function for outputting data to the standard output (usually the console). Let’s explore all its arguments and capabilities in detail. Basic Syntax python print(*objects, sep=’ ‘, end=’\n’, file=sys.stdout, flush=False) Arguments Explained 1. *objects (Positional Arguments) The values to print. You can pass multiple items separated by commas. Examples:…
Escape Sequences in Python Escape sequences are special character combinations that represent other characters or actions in strings. Here’s a complete list of Python escape sequences with two examples for each: 1. \\ – Backslash python print(“This is a backslash: \\”) # Output: This is a backslash: \ print(“Path: C:\\Users\\Name”) # Output: Path: C:\Users\Name 2. \’ – Single quote…
ASCII Code and Related Functions in Python ASCII (American Standard Code for Information Interchange) is a character encoding standard that assigns numerical values to letters, digits, punctuation marks, and other characters. Here’s an explanation of ASCII and Python functions that work with it. ASCII Basics Python Functions for ASCII 1. ord() – Get ASCII value of a…
Complete List of Python String Validation Methods Python provides several built-in string methods to check if a string meets certain criteria. These methods return True or False and are useful for input validation, data cleaning, and text processing. 1. Case Checking Methods Method Description Example isupper() Checks if all characters are uppercase “HELLO”.isupper() → True islower() Checks if all…
Case Conversion Methods in Python (Syntax + Examples) Python provides several built-in string methods to convert text between different cases (uppercase, lowercase, title case, etc.). Below are the key methods with syntax and examples: 1. upper() – Convert to Uppercase Purpose: Converts all characters in a string to uppercase.Syntax: python string.upper() Examples: python text = “Hello, World!”…
1. replace() Method Purpose: Replaces occurrences of a substring with another substring.Syntax: python string.replace(old, new[, count]) Examples: Example 1: Basic Replacement python text = “Hello World” new_text = text.replace(“World”, “Python”) print(new_text) # Output: “Hello Python” Example 2: Limiting Replacements (count) python text = “apple apple apple” new_text = text.replace(“apple”, “orange”, 2) print(new_text) # Output: “orange orange apple”…
String Alignment and Padding in Python In Python, you can align and pad strings to make them visually consistent in output. The main methods used for this are: 1. str.ljust(width, fillchar) Left-aligns the string and fills remaining space with a specified character (default: space). Syntax: python string.ljust(width, fillchar=’ ‘) Example: python text = “Python” print(text.ljust(10)) #…
Classes and Objects in Python What are Classes and Objects? In Python, classes and objects are fundamental concepts of object-oriented programming (OOP). Real-world Analogy Think of a class as a “cookie cutter” and objects as the “cookies” made from it. The cookie cutter defines the shape, and each cookie is an instance of that shape. 1. Using type() function The type() function returns…