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Groups > comp.lang.python > #107684
| From | Ian Kelly <ian.g.kelly@gmail.com> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: Howw to prevent the duplication of any value in a column within a CSV file (python) |
| Date | 2016-04-26 13:50 -0600 |
| Message-ID | <mailman.126.1461700262.32212.python-list@python.org> (permalink) |
| References | <75e5d8dc-e15b-4350-95e8-490abd4aa14f@googlegroups.com> <CALwzidm6yaZKzMLmwvKzFyQ7rvhASp3vPmDA-CYG=iS9YokFuA@mail.gmail.com> <mailman.113.1461687261.32212.python-list@python.org> <514e507d-42de-400e-b999-14605c4456e8@googlegroups.com> <CALwzidkHwpnNgtLR78tgbeurh-aRLMaVqjJ6GWFfXDQMBk84mg@mail.gmail.com> |
On Tue, Apr 26, 2016 at 11:00 AM, Adam Davis <peakgraphicz@gmail.com> wrote:
> On Tuesday, 26 April 2016 17:14:36 UTC+1, Ian wrote:
>> On Tue, Apr 26, 2016 at 10:01 AM, <peakgraphicz@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.
>>
>> Assuming the file is reasonably small enough to fit into memory,
>> create a set and populate it with the values in the column. When the
>> user enters a new value, check whether it's already in the set.
>
> That's exactly what I want to do, however, I'm unsure how to check whether it's in the set?
if value in the_set:
# Forbid the value.
else:
# Allow the value.
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Howw to prevent the duplication of any value in a column within a CSV file (python) peakgraphicz@gmail.com - 2016-04-26 09:01 -0700
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Joel Goldstick <joel.goldstick@gmail.com> - 2016-04-26 12:08 -0400
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Adam Davis <peakgraphicz@gmail.com> - 2016-04-26 10:05 -0700
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2016-04-26 20:10 -0400
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Ian Kelly <ian.g.kelly@gmail.com> - 2016-04-26 10:13 -0600
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Adam Davis <peakgraphicz@gmail.com> - 2016-04-26 10:00 -0700
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Ian Kelly <ian.g.kelly@gmail.com> - 2016-04-26 13:50 -0600
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Adam Davis <peakgraphicz@gmail.com> - 2016-04-26 10:05 -0700
RE: Howw to prevent the duplication of any value in a column within a CSV file (python) Joaquin Alzola <Joaquin.Alzola@lebara.com> - 2016-04-26 19:05 +0000
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Ian Kelly <ian.g.kelly@gmail.com> - 2016-04-26 13:51 -0600
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Adam Davis <peakgraphicz@gmail.com> - 2016-04-26 13:07 -0700
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Ian Kelly <ian.g.kelly@gmail.com> - 2016-04-26 14:19 -0600
Re: Private message regarding: Howw to prevent the duplication of any value in a column within a CSV file (python) Ian Kelly <ian.g.kelly@gmail.com> - 2016-05-02 07:47 -0600
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) MRAB <python@mrabarnett.plus.com> - 2016-04-26 21:23 +0100
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Adam Davis <peakgraphicz@gmail.com> - 2016-04-26 23:26 -0700
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Chris Angelico <rosuav@gmail.com> - 2016-04-27 16:37 +1000
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Adam Davis <peakgraphicz@gmail.com> - 2016-04-27 05:23 -0700
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) Andrew Ongko <andrew.ongko@gmail.com> - 2016-04-27 19:57 +0700
Re: Howw to prevent the duplication of any value in a column within a CSV file (python) darnold <darnold992000@yahoo.com> - 2016-04-27 08:49 -0700
RE: Howw to prevent the duplication of any value in a column within a CSV file (python) Joaquin Alzola <Joaquin.Alzola@lebara.com> - 2016-04-26 16:07 +0000
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