October 2019
Beginner to intermediate
674 pages
16h 43m
English
Content preview from Mastering pandas - Second Edition
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Adding a new column
A new column can be added to a DataFrame by inserting a scalar value into it. Inserting a scalar value into any column of a DataFrame will cause the entire column to be filled with that scalar value:
In [61]: memberDF['Height'] = 60In [62]: memberDF
The following is the output:
Instead of a scalar value, a list of values can also be assigned:
In [63]: memberDF['Height2'] = [57, 62, 65, 59]In [64]: memberDF
The following is the output:
A column can also be inserted at the desired position using the insert method. This needs ...
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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.