Abstraction

Take something complex, give it a name and treat it as a whole without worrying about its details.

Assignment

To bind a name to a value.

Define Function

To bind a name to a expression.
Squirrel the body under the function, which means to hide in a safe place. Return value ATTENTION: IT CAN RETURN MUITIPLE VALUES.

def divide_exact(n,d):
	return n // d , n % d

Default Value:

def square(x=10):
	return x ** 2

Data Abstraction