Can I format a variable in python?
<p>Is there a way of formating a variable?</p>

<p>For example, I'd like to automate the creation of a variable named <i>M_color</i>, where <i>M</i> is a string of value "bingo". The final result would be <i>bingo_color</i>.
What should I do if the value of M changes during the execution?</p>
