eq

Name: __eq__
Uploaded: 2020-12-01T15:09:03Z
Duration: 159 s
Description: Tackle equal comparisons between two objects.

2:39 with Megan Amendola

Tackle equal comparisons between two objects.

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Have questions about this video? Start a discussion with the community and Treehouse staff.

Comparisons are an important feature of programming. 0:00

When it comes to comparing two objects you've created, 0:04

Python will need to know what to do. 0:08

For example, using our car class, how would two instances compare? 0:12

Let's just stick with equals right now. 0:21

What would make two car instances equal? 0:24

Is it matching makes and models or matching makes, models and years? 0:28

Let's just keep it to makes and models. 0:34

We'll need to add the Dunder method that handles equal comparisons to our 0:37

car class, it's Dunder equals. 0:42

It takes self and other which is the thing you're comparing it to. 0:56

Inside the method, let's check if the make and models are equal and return it. 1:02

This will give us the true or 1:24

false boolean value the comparison is looking for. 1:26

Let's test it out with an if statement. 1:30

If one instance is equal to another, 1:33

we can print out a message saying they're equal. 1:35

Otherwise, print out a message saying they're not equal. 1:39

So with our two instances right now, we get not equal when the file is run. 2:04

But if we switch out the make and model to be equal, 2:12

Run it again. 2:22

We get equal. 2:29

Try this out on your own by creating a new class, adding an equal method, and 2:31

testing it out with some comparisons. 2:36

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