python adding a title row to csv output file

I have a python script that gets data from a database and outputs a csv file. Now I'm trying to add a header row containing titles for each of the columns. What do I need to add so that it outputs an initial row ahead of the db output (I'm qui开发者_开发技巧te a newbie to python, so I got stuck in this part and couldn't find the info I needed)?

Thanks in advance!

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If you're using a DictWriter, you can just call writeheader.