Programmatic Google Trends API

Updated October 21, 2009

Yesterday, Google released an update to their popular Google Trends tool. There are improvements over the previous version, but the biggest new feature is a new shiny button that lets you download all your data in the format of a CSV. This is a very cool enhancement. Where Google Trends was a geeky toy, it now takes the leap to integrate into analysts' reports and with that, edge its way onto managerial desks.

This python module is a quasi-API to make it easier to authenticate into Google Trends for those who want to squeeze the extra level of functionality out of their data. The advantage of programmatic access is that the data can be automatically trended and merged. It can be snuck into a 9:00 AM daily email to the VP of Marketing so that she knows to ramp up Google Adwords campaigns for some specific keyword. Also, by programatically pulling multiple reports, it is possible to create a wealth of data not visible in a single report. Using one keyword as a benchmark to merge multiple reports, we can do a meaningful comparison on tens or hundreds of relevant keywords.

To use the pyGTrends, the quasi-Google-Trends-API, you can download the latest version from github.

Here is an example of the most basic basic report that you can pull down from Google Trends. The connector function needs authentication info, and download_report needs to be passed a list of keywords.

from pyGTrends import pyGTrends

connector = pyGTrends('google username','google password')
connector.download_report(('keyword1', 'keyword2'))
print connector.csv()

You can, however, use pyGTrends to get any slice of data that you can pull down from Google Trends. To see the exact parameters that you should use, go to Google Trends, and navigate to the specific sufficiently-narrow report that you are interested in. Then, right-click on the CSV download, and save the link location. The different parameters should be discernible from the link. The following code downloads a report for banana, bread, and bakery keywords from April 2008, originating from the magnificent nation of Austria, and scaled using fixed scaling (aka the second download link).

connector.download_report(('banana', 'bread', 'bakery'), 
                          date='2008-4', 
                          geo='AT', 
                          scale=1)

By default, the csv() function downloads the main part of the report, but there are a few additional parts stuck to the bottom of the CSV file. If you are interested in those, pass the section parameter to the csv() function. The following will return the Language section.

print connector.csv(section='Language')

Full recommended usage includes using either the csv.reader or csv.DictReader module.

from csv import DictReader
print DictReader(connector.csv().split('\n'))

Here is a snapshot from the new Google Trends to add some eye-candy to the post: Google Trends Eye-Candy

This work is licensed under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 United States License. All source code is released under a BSD License unless otherwise specified.

35 comments | Show all comments only the last 5 are shown


February 16, 2010
David said:

I have the same questions as the above.
also, is there a document for using this API.
Thanks


February 23, 2010
Aloysius Adrian said:

I want to ask about section in csv function. I was trying to get a certain csv, but the interpreter stops at line 115 that produces error message : "KeyError: 'main'"

I want to ask about the other parameter. I can not print the csv because of the section parameter there.

Thanks.


February 24, 2010
Sal Uryasev said:

The DictReader module is a Python convenience module for reading data into a dictionary. Its use is optional.

One thing that can be done if there are any issues is to print connector.raw_data, and that would display the direct result from Google Analytics. Google sometimes displays additional username/login related problems that the module may not have accounted for.


March 1, 2010
David said:

From yesterday, This script can't do print connect.csv(). It always returns "Could not find requested section" error. Do you know where the problem is?
I also download the original script in case I modify anything but the error remains.
Thanks


March 2, 2010
Aloysius Adrian said:

@David
I, also, can not get the connect.csv()

I contacted Mr. Uryasev, and he suggested that I try print connect.raw_data

I did that, but the result/output was : "You must be signed in to export data from Google Trends"

I wonder if you also get that kind of output..

Your name

Email (optional, will not be shared)

Type the word "juice" (required to confuse the spammers)

Your comment


Add a comment