How do i check if an indexed part of a list has a value or string?
<p>Trying to make connect 4 and having some issues.</p>

<p>Lets say, player one puts their counter in <code>row[4]column[3]</code>
before player 2 plays, <strong>I wanna be able to check and see if the position player 2 wants to put their counter in is not already taken</strong>.</p>

<p>This will prevent overriding</p>