Yet Another Tabular Data Question

[patrick.waldo at gmail.com]

Hi all,

Fairly new Python guy here.  I am having a lot of trouble trying to
figure this out.  I have some data on some regulations in Excel and I
need to basically add up the total regulations for each country--a
statistical analysis thing that I'll copy to another Excel file.
Writing with pyExcelerator has been easier than reading with xlrd for
me...So that's what I did first, but now I'd like to learn how to
crunch some data.

The input looks like this:

Country         Module
Topic                      # of Docs
Argentina	Food and Consumer Products	Cosmetics		 1
Argentina	Food and Consumer Products	Cosmetics		 8
Argentina	Food and Consumer Products	Food Additives		1
Argentina	Food and Consumer Products	Food Additives	        1
Australia 	Food and Consumer Products	Drinking Water	    	 7
Australia	Food and Consumer Products	Food Additives		 3
Australia	Food and Consumer Products	Food Additives	         1
etc...

So I need to add up all the docs for Argentina, Australia, etc...and
add up the total amount for each Topic for each country so, Argentina
has 9 Cosmetics laws and 2 Food Additives Laws, etc...

So, here is the reduced code that can't add anything...Any thoughts
would be really helpful.

import xlrd
import pyExcelerator
from pyExcelerator import *

#Open Excel files for reading and writing
path_file = "c:\\1\\data.xls"
book = xlrd.open_workbook(path_file)
Counts = book.sheet_by_index(1)
wb=pyExcelerator.Workbook()
matrix = wb.add_sheet("matrix")

#Get all Excel data
n=1
data = []
while n<Counts.nrows:
    data.append(Counts.row_values(n, start_colx=0, end_colx=None))
    n=n+1

COUNTRY, MODULE, TOPIC,DOCS = range(4)
COUNTRY_TOT = []
n=0
while n<len(data):
    x=n
    while data[n][COUNTRY]==data[n+1][COUNTRY]:
        n=n+1
    print sum(data[x:n][FT_DOCS])

wb.save('c:\\1\\matrix.xls')