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import bs4 as bs
import pickle
import requests

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html = requests.get('http://en.wikipedia.org/wiki/List_of_S%26P_500_companies')
soup = bs.BeautifulSoup(html.text, 'lxml')
table = soup.find('table', {'class': 'wikitable sortable'})

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tickers = []
for row in table.findAll('tr')[1:]:
        ticker = row.findAll('td')[0].text
        ticker = ticker[:-1]
        tickers.append(ticker)

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with open("sp500tickers.pickle", "wb") as f:   
        pickle.dump(tickers, f)

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import datetime as dt
import os
import pandas_datareader.data as pdr

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with open("sp500tickers.pickle", "rb") as f:
        tickers = pickle.load(f)
if not os.path.exists('stock_dfs'):
        os.makedirs('stock_dfs')

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start = dt.datetime(20XX, 1, 1)
end = dt.datetime.now()
    
for ticker in tickers:
    if not os.path.exists('stock_dfs/{}.csv'.format(ticker)):
        df = pdr.DataReader(ticker.replace('.', '-'), 'yahoo', start, end)
        df.reset_index(inplace=True)
        df.set_index("Date", inplace=True)
        df.to_csv('stock_dfs/{}.csv'.format(ticker))
    else:

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let sumLargestNumbers = function(data) {
  let sorted = data.sort(function(a,b){
    return b - a;
  })
  return sorted[0] + sorted[1];
};

console.log(sumLargestNumbers([1, 10]));
console.log(sumLargestNumbers([1, 2, 3]));
console.log(sumLargestNumbers([10, 4, 34, 6, 92, 2]));

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let conditionalSum = function(values, condition) {
  var sum = 0;
  values.forEach( function(value) {
    if(condition == "even" && value % 2 === 0) {
      sum += value;
    } else if (condition == 'odd' && value % 2 !== 0) {
      sum +=value;
    }
  });
  return sum;

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let numberOfVowels = function(data) {
  let count = 0;
  for (var i = 0; i < data.length; i++) {
    if(data[i] === 'a' || data[i] === 'e' || data[i] === 'i' || data[i] === 'o' || data[i] === 'u') {
      count++;
    }
  }
  return count;
};