Scraping site to build currency exchange dictionary
<p>I need to build a dict of currency to usd, it would look like this:</p>

<pre><code>exchange_rates = {'USD': 1.00000,
                  'EUR': 1.32875,
                  'GBP': 1.56718, ...}
</code></pre>

<p>There are about 15 currencies I need to get and <strong>I need to build this dict on a daily basis</strong>. Has someone done this before, where they could show me the script they're using/the website they're scraping?</p>
