April 2025
Intermediate to advanced
630 pages
12h 48m
Portuguese (Portugal, Brazil)
Content preview from Introduzindo Python, 2ª Edição
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
Capítulo 3. Números
Este trabalho foi traduzido com recurso a IA. Agradecemos o teu feedback e comentários: translation-feedback@oreilly.com
A melhor ação é aquela que proporciona a maior felicidade ao maior número de pessoas.
Francis Hutcheson
Neste capítulo, começamos por ver os tipos de dados incorporados mais simples do Python:
-
Booleanos (que têm o valor
TrueouFalse) -
Inteiros (números inteiros como
42e100000000) -
Floats (números com pontos decimais como
3.14159, ou por vezes expoentes como1.0e8, que significaum vezes dez à oitava potência, ou100000000.0)
De certa forma, são como átomos. Neste capítulo, utilizamo-los individualmente e, em capítulos posteriores, verás como combiná-los em "moléculas" maiores, como listas e dicionários.
Cada tipo tem regras específicas para a sua utilização e é tratado de forma diferente pelo computador. Também mostro como utilizar valores literais como 97 e 3.1416, e as variáveis que mencionei no Capítulo 2.
Os exemplos de código neste capítulo são todos Python válidos, mas são snippets. Vamos usar o interpretador interativo Python, escrevendo estes snippets e vendo os resultados imediatamente. Tenta executá-los tu mesmo com a versão do Python no teu computador. Reconhecerás estes exemplos pelo prompt >>>.
Booleanos
Em Python, os únicos valores para o tipo de dados booleano são True e False. Por vezes, vais usá-los diretamente; outras vezes vais avaliar a "veracidade" de outros tipos a partir dos seus valores.A função especial ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.