December 2000
Intermediate to advanced
816 pages
16h 57m
English
Content preview from Core Python Programming
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.
15.2. Special Symbols and Characters for REs
We will now introduce the most popular of the metacharacters, special characters and symbols, which give regular expressions their power and flexibility. You will find the most common of these symbols and characters in Table 15.1.
| Notation | Description | Example RE |
|---|---|---|
| Symbols | ||
| re_string | match literal string value re_string | foo |
| re1|re2 | match literal string value re1 or re2 | foo|bar |
| . | match any character (except NEWLINE) | ::.+:: |
| ^ | match start of string | ^Dear |
| $ | match end of string | /bin/\w*sh$ |
| * | match 0 or more occurrences of preceding RE | [A-Za-z]\w* |
| + | match 1 or more occurrences of preceding RE | \d+\.|\.\d+ |
| ? | match 0 or 1 occurrence(s) of preceding RE | goo? |
| {N} | match N occurrences ... | |
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.