[Personal memo] Get data on the Web and make it a DataFrame

#Import requests to get data from the web.
import requests

#Use StringIO for CSV data.
from io import StringIO

#The URL of the data.
url = "http://elections.huffingtonpost.com/pollster/2012-general-election-romney-vs-obama.csv"

#Use requests to get the data as text.
source = requests.get(url).text

#Use StringIO to prevent pandas errors.
poll_data = StringIO(source) 

poll_df = pd.read_csv(poll_data)

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