Help with cumulative sum

Maggie la.foma at gmail.com
Tue Sep 8 21:49:23 CEST 2009


On Sep 8, 3:29 pm, Maggie <la.f... at gmail.com> wrote:
> Building on the code that I posted in one of the previous posts.. I
> need to find a cumulative sum of the file of the times in the test
> file:
>
> here is the code i have:
>
> #!/usr/bin/python
>
> import os.path
>
> #name of output file
> filename = "OUTPUT.txt"
>
> #open the file
> test = open ("test.txt", "rU")
>
> #read in all the data into a list
> readData = test.readlines()
>
> count = 0
>
> FILE = open(filename, "w")
>
> for item in readData:
>
>    count = count + 1
>    tmp_string = str(count) + '  ' + item
>    print >> FILE, tmp_string,
>
> else:
>    print 'The loop is finito'
>
> -----
>
> my test file is this
>
> 23
> 241
> 34234
> 83
> 123
>
> and I need to find a CUMULATIVE sum (or the running sum)...what would
> be the best way to go about that given the code i already have?
>
> thank you all!

---

was trying to plug in the sum for the loop..but for some reason it
doesnt want to work --

#!/usr/bin/python

import os.path

#name of output file
filename = "OUTPUT.txt"

#open the file
formisano = open ("test.txt", "rU")

#read in all the data into a list
readData = formisano.readlines()

sum = 0
count = 0

FILE = open(filename, "w")

for item in readData:

   count = count + 1
   sum = sum + (int(item) * int(item))
   tmp_string = str(count) + '	' + item + '	'+ sum
   print >> FILE, tmp_string,

else:
   print 'The loop is finito'



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