Are there reserved kwargs for python's dict constructor?
<p>When using the kwarg-style dict initialization:</p>

<pre><code>In [3]: dict(a=1, b=2, c=3)
Out[3]: {'a': 1, 'b': 2, 'c': 3}
</code></pre>

<p>for some reason, defining the key 'from' raises a syntax error:</p>

<pre><code>In [4]: dict(to=0, from=1)
------------------------------------------------------------
   File "&lt;ipython console&gt;", line 1
     dict(to=0, from=1)
                   ^
SyntaxError: invalid syntax
</code></pre>

<p>What is special about the key 'from'?  Are there any other reserved keys for the kwarg-style initialization?</p>

<p>I am using Python 2.6.</p>
