Resolved: split before first comma in pandas and output

Question:

I want to output the following table in pandas. I only have the description column so far but I want to split on the comma and output the contents before the comma in the commondescrip column.
I have the description column right now, I need the commondescrip column

I tried
but it gives me NaN for those rows that have Area.
How can I fix it so that I can achieve the above the table and split it to output before the comma?

Answer:

Here is one way to do it

If you have better answer, please add a comment about this, thank you!