How can I check each row of a large csv and write the row if a certain column contains a certain value?
<p>I am working with a large (3.5GB) .csv file that I can't process entirely in memory and want to:</p>

<ul>
<li>Read in one row of data</li>
<li>Check if a field is equal to a given criteria</li>
<li>If true, append that row to new .csv file. If false, skip to next row</li>
<li>Loop until end of original file is reached</li>
</ul>

<p>The end result would be a separate .csv containing all the rows that matched the criteria.</p>