me of a program.

<p>
Because of Python's somewhat unusual variable assignment semantics, it is not
possible to directly link a C global variable into an equivalent Python variable.
Instead, all C global variables are accessed as attributes of a special object
called 'cvar'.  For example, if you had a global variable

<blockquote>
<pre>
double foo;
</pre>
</blockquote>

it will be accessed in the Python module as <tt>cvar.foo</tt>. Click
<a href="example.py">here</a> to see a script that updates and prints
