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    <p>Since the <code>yahoo.finance.option_contracts</code> table is a <a href="http://datatables.org" rel="nofollow">Community Open Data Table</a> you will want to include it as part of the environment for the query. The easiest way to do that is to load up the environment file for <em>all</em> community tables; just like clicking "Show Community Tables" in the YQL console.</p> <p>One would normally do that by specifying an <code>env=...</code> parameter in the YQL query URL, or (as you have done) with a <code>use</code> clause in the query itself.</p> <p>The Python library that you are using lets you pass in the environment file as an argument to <code>execute()</code>.</p> <pre><code>import yql y = yql.Public() query = 'SELECT * FROM yahoo.finance.option_contracts WHERE symbol="SPY"' y.execute(query, env="store://datatables.org/alltableswithkeys") </code></pre> <hr> <p>Here's an example of extending <code>yql.Public</code> to be able to define the default environment on instantiation.</p> <pre><code>class MyYql(yql.Public): def __init__(self, api_key=None, shared_secret=None, httplib2_inst=None, env=None): super(MyYql, self).__init__(api_key, shared_secret, httplib2_inst) self.env = env if env else None def execute(self, query, params=None, **kwargs): kwargs["env"] = kwargs.get("env", self.env) return super(MyYql, self).execute(query, params, **kwargs); </code></pre> <p>It can be used like:</p> <pre><code>y = MyYql(env="store://datatables.org/alltableswithkeys") query = 'SELECT * FROM yahoo.finance.option_contracts WHERE symbol="SPY"' r = y.execute(query) </code></pre> <p>You can still override the <code>env</code> in an individual call to <code>y.execute()</code> if you need to.</p>
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    1. COThanks. Is there a way to provide the env as part of initializing instead of having to pass it with every execute()?
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    2. CONo, but it's not a huge amount of work to extend `yql.Public` to do that. See my edited answer.
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