What are Python's mutable and immutable data types?
In Python, data types are classified as mutable or immutable based on whether their value can be changed after creation.
Mutable types allow modification after their creation. Common mutable types include:
Lists: Elements in a list can be changed, added, or removed.
Dictionaries: Key-value pairs can be updated, added, or deleted.
Sets: Elements can be added or removed.
Example:
mylist = [1, 2, 3]
mylist[0] = 10 # List is modified
Immutable types cannot be changed once they are created. Common immutable types include:
Integers: Numeric values cannot be altered after assignment.
Strings: You cannot modify individual characters within a string.
Tuples: Similar to lists, but their elements cannot be changed after assignment.
Booleans and Floats: Their values remain constant once assigned.
Example:
my_tuple = (1, 2, 3)
Any attempt to change my_tuple[0] would raise an error
Understanding the difference between these types is crucial for optimizing memory usage and performance in Python programs. For a more in-depth understanding, consider enrolling in a Python certification course to enhance your programming skills.