February 2017
Intermediate to advanced
274 pages
5h 58m
English
Content preview from Learning PySpark
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Determining the most popular non-stop flights
Expanding upon our tripGraph GraphFrame, the following query will allow us to find the most popular non-stop flights in the US (for this dataset):
# Determine the most popular non-stop flights
import pyspark.sql.functions as func
topTrips = tripGraph \
.edges \
.groupBy("src", "dst") \
.agg(func.count("delay").alias("trips"))
# Show the top 20 most popular flights (single city hops)
display(topTrips.orderBy(topTrips.trips.desc()).limit(20))Note, while we are using the delay column, we're just actually doing a count of the number of trips. Here's the output:
As can be observed from this query, the two most ...
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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.