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That's the basics of object mutability.

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You should now be able to identify whether an object is mutable or not,

3
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less mutable, tuples and strings not.

4
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You should be able to recognize when two variables are aliases for the same object and

5
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realize that if you make a change to the object at one variable refers to,

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you'll be changing the contents of the other variable at the same time.

7
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We sometimes refer to mutation operations as destructive.

8
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They changed the object and then any aliases for

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that object also see the effects of that destruction.

10
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Speaking of destructive operations,

11
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did you hear about the guy who worked at the calendar factory?

12
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He got fired because he took a couple days

13
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off and another bonus joke: Was an undercover tarantulas alias?

14
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A spider. Keep laughing,

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keep coding, see you next time.