February 2024
Beginner
352 pages
8h 16m
English
book
Learn Python the Hard Way: A Deceptively Simple Introduction to the Terrifyingly Beautiful World of Computers and Data Science, 5th Edition
by Zed A. Shaw
Content preview from Learn Python the Hard Way: A Deceptively Simple Introduction to the Terrifyingly Beautiful World of Computers and Data Science, 5th Edition
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Exercise 24
Introductory Dictionaries
In this exercise, we’ll use the same data from the previous exercise on lists and use it to learn about Dictionaries or dicts.
Key/Value Structures
You use key=value data all the time without realizing it. When you read an email, you might have:
1 From: j.smith@example.com
2 To: zed.shaw@example.com
3 Subject: I HAVE AN AMAZING INVESTMENT FOR YOU!!!On the left are the keys (From, To, Subject), which are mapped to the contents on the right of the :. Programmers say the key is “mapped” to the value, but they could also say “set to” as in, “I set From to j.smith@example.com.” In Python, I might write this same email using a data object like this:
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.