[Tutor] Please help matching elements from two lists and printing them

[Bob Gailer]

At 02:51 PM 12/8/2004, kumar s wrote:
>Dear group,
>
>  I have two tables:
>
>First table: spot_cor:
>432     117
>499     631
>10      0
>326     83
>62      197
>0       0
>37      551
>
>
>
>Second table: spot_int
>0       0       98
>1       0       5470
>2       0       113
>3       0       5240
>4       0       82.5
>5       0       92
>6       0       5012
>7       0       111
>8       0       4612
>9       0       115
>10      0       4676.5
>
>
>
>I stored these two tables as lists:
>
> >>> spot_cor[0:5]
>['432\t117', '499\t631', 10\t0', '326\t83', '62\t197']

Note there is no ' before the 10. That won't fly'

> >>> spot_int[0:5]
>['  0\t  0\t18.9', '  1\t  0\t649.4', '  10\t
>0\t37.3', '  3\t  0\t901.6', '  4\t  0\t14.9']

It would be a lot easier to work with if the lists looked like (assumes all 
data are numeric):
[(432,117), (499,631), (10,0), (326,83), (62,197)]
[(0,0,18.9), (1,0,649.4), (10,0,37.3), (3,0,901.6), (4,0,14.9)]

What is the source for this data? Is it a tab-delimited file? If so the CSV 
module can help make this translation.

I also assume that you want the first 2 elements of a spot_int element to 
match a spot_cor element.

Then (for the subset of data you've provided):

 >>> for ele1 in spot_cor:
...       for ele2 in spot_int:
...             if ele1 == ele2[:2]:
...                     print "%8s %8s %8s" % ele2
...
       10        0     37.3

>I want to write all the three columns of spot_int.
>[snip]

Hope that helps.

Bob Gailer
bgailer at alum.rpi.edu
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