Mixing Boolean Expressions With Objects

00:00 In this lesson, you’ll learn that you can actually mix Boolean expressions with objects using and. And once you understand how Python implements and, you’ll see that it’s not much different. x and y will evaluate to x if x is false, and it doesn’t matter if x is a Boolean expression or an object. Likewise, if x is true, the result is y, and it too can be a Boolean expression or an object.

00:30 So let’s look at some examples. Here, the first expression is true, so the result will be second expression, 2. Switching them around, 2 is true, so the result will be 2 < 4, which evaluates to True.

00:56 Here, again, the left part is true, so the result will be the right part, the empty list. But here, an empty list is False, so that will be the result.

01:14 5 isn’t greater than 10. That evaluates to False, so False will be the result.

01:25 And here, an empty dictionary is considered False, so that’s the result.

01:34 Once again, the left part evaluates to False, so that’s the result. But this way, 4 is True, so the result will be the value of 5 > 10.

01:49 Again, same rules: first operand False, that value is returned. First operand True, the second operand’s value is returned. Next, you see how and interacts with other operations in Python.