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Hey, welcome back. It's Day 9 of 100 Days of Code.

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And today we're going to be learning more about Python dictionaries

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and nesting. And by the end of today,

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you will have built a silent auction program.

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We all know that there are auctions where everybody bids and you can see

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everybody else's bid and the auctioneer gets you to bid higher and higher

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values. Now there's also a type of auction called

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a silent auction where everybody bids silently and no one knows the other

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person's bids until at the very end of the auction where the highest bid is

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revealed. That's what we're going to be building.

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And if you wanna check out the final program,

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then you can go to blind-auction-completed

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.appbrewery.repl.run.

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And here you'll not only see this amazing gavel built out of ASCII,

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but also the secret auction program. So here's how it works:

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let's say that I'm going to be the first person logging onto the program.

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I'm going to give my name and my bid. Let's say

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I'm going to bid a $53 for this item.

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And once I'm done with my bid, it asked me whether

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if there are any other bidders.

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So if I type a yes then the screen clears and I can handover the laptop to

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the next person who's going to make their bid. So let's say there's James

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who's going to bid, um, even less than I did.

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And then he's gonna make way for the final bidder who is going to bid $121.

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So now at this stage, if everybody is done, then we type no,

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and it's going to now tally up all the bids and figure out who bid the highest

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and give us a winner, printing out 'The winner is Jenny

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with a bid of $121.' There's a number of places that you could use this

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if you are auctioning some piece of art or if you're trying to outbid your

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brothers and sisters on who gets to go on the trampoline,

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or if you're trying to start an auction with your friends or coworkers.

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The silent auction has many, many uses. All right, in today's lessons,

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we're going to be focusing mostly on the Python dictionary. But in addition,

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we're also going to look at how we can nest say lists inside lists or

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dictionaries inside dictionaries and also mixing lists and dictionaries as well.

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Once you're ready,

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head over to the next lesson and let's get started with the day.