Convert csv rows into columns in python : <p>i have CSV file like:
<a href="https://i.stack.imgur.com/9oBYs.png" rel="nofollow noreferrer">CSV DATA</a></p>

<p>want to convert into single list like:
253,514,517,6514,6518,407,865</p>

<p>reading data row wise while neglecting 0 and duplications</p>
