Does anyone recently have problem with this url "http://download.finance.yahoo.com/d/quotes.csv?f=snl1&s={}" in helpers.py of pset7?
Before yesterday, the lookup() in helpers.py worked fine but since yesterday, it have started return None for every symbol, even FB or AAPL. I have tried the url: Does anyone recently have problem with this url http://download.finance.yahoo.com/d/quotes.csv?f=snl1&s=AAPL on my browser and it returned "Sorry, Unable to process request at this time -- error 999." I guess there is something wrong with Yahoo Finance but staff solution at http://finance.cs50.net/ is still working.