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So let's talk about tuples.

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All of the common sequence

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operations can be performed on tuples. We
have looked at a table of those

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operations, earlier, and let's just bring
that back on the screen again. So these

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ones here. Alright, so those there - all
of those can be performed on tuples.

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Alright, so let's have a look at some
tuples to see what they look like. I'm

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gonna shoot back to IntelliJ, and we're gonna
create a new file here. We're going to

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call this one tuples_intro.py.

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Alright, so I'm gonna start by typing t equals, in 
double quotes, a comma double quotes,

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or in double quotes, b comma, then within
double quotes, c. Then on line 2, I'm going to

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print parentheses t. So run the program,

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and the output looks very much like a
list. Notice, though, that it prints in

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parentheses, instead of square brackets,
and that's how you can tell that you're

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dealing with a tuple, rather than a list.
In fact, you can use parentheses when

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defining your tuples. I'll enclose our
tuple in parentheses, like so.

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Running the program, we get exactly the same
output. The program worked before

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without the parentheses, so obviously, they're
optional. Now there are a couple of times,

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though, when you must use parentheses. To
keep things simple and avoid having yet

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another thing to remember, you may want
to always use parentheses around your tuples.

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I'll admit that my style has been not to

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use them, unless they're necessary, so
don't be confused if you see an

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example that doesn't use them. In fact, I may
slip one or two in without parentheses.

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You will find, though, code on-line  that doesn't use parentheses

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around tuples, so it certainly won't hurt to be

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familiar when reading it. Alright, so
let's see when parentheses are needed.

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So we've already seen that we can pass
several arguments to the print function.

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Let's open up moreprint.py again. So
I'm going to delete the last line - that's

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because we're not interested in
separators for this example.

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So on line four, we're telling print to print four items.

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We've got the two variable names - name
and age - followed by the string Python

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and the int literal 2020. So I run the
program - we get the four values printed out.

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The print function interprets that
as four separate variables. Remember that

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print allows us to provide multiple
arguments to be printed. What if we

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wanted that to be a tuple, instead of
four separate values. In that case,

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we have to use parentheses. So I'm gonna come up
here. So l'm gonna duplicate line 4 there,

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and on line 5, now, I'm going to add
parentheses around our four objects,

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like so, and now if we run it,
we can see the difference there. Line 5

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results in a single value - a tuple - being printed.

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So parentheses must be used, when you
pass a tuple literal as an argument to a function.

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Well in the next few videos, we'll look

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at why they are useful, and also see some
more things you can do with them.

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See you in the next video