Python courses

Set Comprehensions in Python Basic Set Comprehension A set comprehension allows you to construct a new set by applying an expression to each element in an existing iterable (like a list, tuple, or another set). Syntax:  {expression for item in iterable} Example: Create a set of squares for numbers 1 through 5:  squares = {x**2 […]

Useful Set Methods in Python add(elem) Adds a unique element to the set. If the element already exists, the set remains unchanged. Example:  my_set = {1, 2, 3} my_set.add(4) print(my_set)  # Output: {1, 2, 3, 4} discard(elem) Removes a specific element from the set. If the element does not exist, no changes are made and

Removing Elements from Python Sets Using remove() The remove() method allows you to remove a specific element from a set. If the element does not exist in the set, it raises a KeyError. Example:  my_set = {1, 2, 3, 4, 5} # Remove a specific element my_set.remove(3) print(“Set after removing 3:”, my_set)  # Output: {1,

Adding Elements to Python Sets Adding Single Elements with add() The add() method allows you to add a single element to a set. If the element already exists in the set, it won’t be added again, since sets do not allow duplicate elements. Example:  my_set = {1, 2, 3} # Add an element to the

Accessing Elements in Python Sets Membership Test To check if an element is in a set, use the in operator. Example:  my_set = {10, 20, 30, 40, 50} # Check if 30 is in the set print(30 in my_set)  # Output: True # Check if 60 is in the set print(60 in my_set)  # Output:

Operations with Sets Basic Set Operations Adding Elements You can add elements to a set using the add() method. If the element is already present, the set remains unchanged.  # Creating a set my_set = {1, 2, 3} # Adding an element my_set.add(4) print(my_set)  # Output: {1, 2, 3, 4} # Adding a duplicate element

The constructor set()  The set() constructor is a built-in function in Python used to create sets. Below are the main ways to use this constructor, with illustrative examples. Creating an Empty Set To create an empty set, simply call set() with no arguments. This initializes an empty set which you can then populate with elements.

Data Types of Set Elements in Python Allowed Data Types Set elements in Python must be hashable, which means they need to be immutable and have a fixed hash value throughout their lifetime. In other words, the following data types can be used as set elements: Integers (int): Whole numbers. Floats (float): Floating-point numbers. Strings

Obtaining the Length of a Set in Python Using the len() Function The primary way to obtain the length of a set is by using the built-in len() function. This function returns the number of items in an iterable, including sets. Syntax  len(set) Example  # Create a set with some elements my_set = {1, 2,

Creating a Set in Python Using Curly Braces {} The most common way to create a set is by using curly braces {}. This syntax is straightforward and allows you to specify the elements of the set directly. Example:  # Creating a set with specified elementsmy_set = {1, 2, 3, 4} print(my_set)  # Output might