Python: how to pass a reference to a function
<p>IMO python is pass by value if the parameter is basic types, like number, boolean</p>

<pre><code>func_a(bool_value):
    bool_value = True
</code></pre>

<p>Will not change the outside <code>bool_value</code>, right?</p>

<p>So my question is how can I make the <code>bool_value</code> change takes effect in the outside one(pass by reference?</p>
