Executing Outgoing GET Request (Query) from Flask to External Site

Question

I am building a Flask site. The client will access a page into which they will enter a stock ticker, submit it to Yahoo Finance and retrieve the name, price, and symbol of the security. The data will be rendered on a separate template. Modules used include Flask and urllib.request.

It seems I am Googling the incorrect terminology. Could someone point me in the direction of the correct search terms?

You need to make a call out to the external API using either `requests`, `urllib3` or a library designed for retrieving data from Yahoo Finance. You can then modify the result (if needed) and return it to the user. — Suever, Feb 08 '17 at 02:44
@Suever - Sounds good to me. At least now I know where to look. Many thanks! — Ryan, Feb 08 '17 at 02:50

score 1 · Accepted Answer · edited May 23 '17 at 11:53

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It seems to me that you need to use the Yahoo Finance API to get the data you need.

See this question:

yahoo finance stock quote api

Here is Yahoo Developer Network:

https://developer.yahoo.com/

Unless I misunderstood your question, I think this is the direction you need to go.

Otherwise, you could set up an iFrame and GET into that. But somehow I don't think that's what you're after.

edited May 23 '17 at 11:53

Community

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answered Feb 08 '17 at 02:50

nicorellius

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This is exactly the direction. Much appreciated! – Ryan Feb 08 '17 at 02:51
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@Ryan D: If you end up making this work, let us know. I'd be curious to see how you solve it. Cheers – nicorellius Feb 08 '17 at 02:53
See solution below. Cheers! – Ryan Feb 08 '17 at 23:52

score 1 · Answer 2 · answered Feb 08 '17 at 23:50

The following snippet plus 2 html pages including Jinja to extend an underlying layout did the trick. The heart of the (stock ticker) lookup function (below) came from stackoverflow, and I added functionality. As noted last night, it really did come down to search terms and learning the vocabulary/jargon of Flask. Thanks again to those who participated.

# http://stackoverflow.com/a/21351911
try:
    url = "http://download.finance.yahoo.com/d/quotes.csv?f=snl1&s={}".format(symbol)
    webpage = urllib.request.urlopen(url)
    datareader = csv.reader(webpage.read().decode("utf-8").splitlines())
    row = next(datareader)
except:
    return None

Cool. Glad you found something that worked. It's too bad someone had to down vote your OQ. Hopefully that won't be too discouraging moving forward with SO. — nicorellius, Feb 09 '17 at 01:50

Executing Outgoing GET Request (Query) from Flask to External Site

2 Answers2