What are some commonly used built-in functions in Python?

Commonly used built-in functions in Python include:

1. abs(): returns the absolute value of a number
2. len(): returns the length of an object
3. max(): returns the largest value of the given parameters
4. min(): returns the minimum value of the given parameters
5. sum(): Returns the sum of the elements.
6. range(): generate a sequence of integers within a specified range.
7. str(): Convert object to string.
8. int(): Convert a string or number to an integer.
9. Float(): Convert a string or number into a floating point number.
10. input(): Receive input from the user
11. print(): display the output on the screen.
12. type(): returns the type of an object
13. sort(): sorting the iterable object
14. zip(): combines multiple iterable objects into a list of tuples.
15. map(): applies a function to each element in an iterable object.
16. filter(): Filters elements in an iterable object.
17. The function any() checks if any element in an iterable object is True.
18. ‘all(): Determines if all elements in the iterable object are True’

These are commonly used built-in functions in Python, and more can be found in the official Python documentation.