What keyword is used to define a class in Python?

In Python, the keyword used to define a class is "class." This keyword precedes the name of the class and establishes a new class definition. When you declare a class, you're creating a blueprint for objects. This structure allows you to define attributes and methods that will belong to the instances of the class.

For example, when you write class MyClass:, you initiate the definition of MyClass, which can then include instance variables and methods tailored to its functionality. This is a fundamental concept in object-oriented programming, enabling encapsulation and inheritance, which are key principles when working with classes in Python.

Using any of the other keywords presented would not correctly initiate a class definition in Python. "Define" does not exist in Python as a class declaration keyword, "object" refers to an instance of a class rather than a way to create one, and "create" does not serve a functional purpose in this context. Understanding the use of "class" is essential for defining and working with custom objects in Python effectively.