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So how did you get on, adding another
parameter to our function definition?

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Well the change is quite simple - we just
need to add another parameter on line

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one, and delete line two. So let's have a go

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at doing that. So I'm going to put a comma
on line one in the parentheses after

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text, screen_width, then we're
going to delete line two.

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Alright, so our function now let's the
calling code specify the width.

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That change caused errors in our main code,
because we're not providing an argument

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for the width. I'm going to come back to
this in the next video.

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Ideally, any changes we make shouldn't
break existing code. There is a way to

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deal with this, and we'll be covering
that next. Before that, though, I'm going to use a

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width of 66. That should be wide enough
for the longest line in our banner.

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So what I'm going to do, is add a width as
the second argument on each line now,

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and I'll just fast forward this part of the
video so you're not wasting time

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watching me do it.

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Alright, so you can see that I've made the 
changes now. I've added a second argument,

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66 being the width, on lines 14
to 24. If we run the program now,

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we're back to getting output that looks good again.

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Alright, so that's my solution to the
challenge. Now you should also have used a

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value that's too small, at least once, to
check that your exception is still

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raised. So remember to test every
possible path through your functions.

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I won't do that on video, but if you didn't,
pause the video and do it now.

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Okay, so that's made our function more
flexible, but it was a bit annoying

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having to add comma 66 on each of those
lines. We made our function a bit better,

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but it's still not perfect. What would be
ideal, would be to provide a default

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value, if your calling code didn't
provide something.

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Well Python lets parameters have a
default value, using keyword arguments.

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We have come across them before. In the next
video, we'll learn how to use them in our

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own functions. See you in the next video.