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Date: Tue, 30 Apr 2013 13:19:56 -0500
From: Tim Chase <python.list@tim.thechases.com>
To: upendra kumar Devisetty <upendrakumar.devisetty@googlemail.com>
Subject: Re: how to compare two fields in python
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On 2013-04-30 10:41, upendra kumar Devisetty wrote:
> I have a very basic question in python. I want to go through each
> line of the a csv file and compare to see if the first field of
> line 1 is same as first field of next line and so on. If it finds a
> match then i would like to put that field in an object1 else put
> that field in a different object2. Finally i would like to count
> how many of the fields in object1 vs object2. Can this be done in
> python? Here is a small example.
> 
> BRM_1   679 1929
> BRM_1   203 567
> BRM_2   367 1308
> BRM_3   435 509
> As you can see field1 of line1 is same as field2 of line2 and so
> that field BRM_1 should be place in object1 and BRM_2 and BRM_3
> should be placed in object2. So the final numbers of object1 is 1
> and object2 is 2.

You underdefine the problem.  What happens in the case of:

  BRM_1 ...
  BRM_1 ...
  BRM_2 ...
  BRM_1 ...   <-- duplicates a (not-immediately) previous line
  BRM_3 ...

Also, do the values that follow have any significance for this, or
are they just noise to be ignored?

-tkc