[Tutor] File handling Tab separated files

[Alan Gauld]

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On 20/04/18 09:10, Niharika Jakhar wrote:
> Hi
>
> I want to store the data of file into a data structure which has 11
> objects per line , something like this:
> 2354   <tab>      somethin2     <tab> 23nothing   <tab>    23214.....
>
>
> so I was trying to split the lines using \n and storer each line in a
> list so I have a list of 11 objects, then I need to retrieve the last
> two position,

You are using the csv module so you don't need to split the lines, the
csv reader has already done that for you. It generates a sequence of
tuples, one per line.

So you only need to do something like:

results = []
with open(filename) as f:
     for line in csv.reader(f, delimiter='\t'):
         if line[-1] == line[-2]:
            results.append(line[2],line[3])

Let the library do the work.

You can see what the reader is doing by inserting a print(line) call
instead of the if statement. When using a module for the first time
don't be afraid to use print to check the input/output values.
Its better than guessing.


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Alan G
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