Can you name the main built-in primitive data types used in Python?

The main built-in primitive data types in Python:

• int — integers, for example: 42
• float — floating-point numbers, for example: 3.14
• bool — boolean values: True or False
• str — strings, for example: 'Hello'
• bytes — sequence of bytes, for example: b'abc'

These types are the basic building blocks for working with data in Python.