Howw to prevent the duplication of any value in a column within a CSV file (python)

Tue Apr 26 12:08:47 EDT 2016

On Tue, Apr 26, 2016 at 12:01 PM,  <peakgraphicz at gmail.com> wrote:
> I am wondering how to make my code function so it does not allow any of the same values to be entered into a column in my CSV file created through python. So I need to read into the CSV file and check if any names have already been entered. If they have, the user must not be allowed to enter this value.
>
> Thanks in advance!
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