Good afternoon,

I use PythonWin32 in my XP machine. I am programming an application and have 
trouble with memory when using the sumComb list below, that has a size of 
2,657,205 elements. I DO NEED this many elements because they are product of 
combinatorial math operations. To solve my memory problem I created a file on 
disk that stores the elements of the list as they are created. Now, I need to 
use the 'list' in a generator and have not been able to replicate the effect 
without actually calling/storing the list in memory, that is, using the data 
directly from the file on disk:

I need to mimic what the following generator does:
def  validList(sumComb, GammaPossible, valid):
    for l in sumComb:
       for m in sumComb:
         for n in sumComb:
                k = [l,m,n]
                i = 0
                while i < valid:
                     C = 0
                     j = 0
                     while j < 3:
                           C = C +((GammaPossible[i][j])*k[j])
                           j += 1
                     yield C
                     i += 1

By not using the list sumComb in memory, but having its elements in a file F 
writen using F = open("my_list.txt", "w") and where elements are stored with 
column "/n" separation. I have not been able to find the appropriate syntax for 
the nested 'for' loops to replace sumComb list by using F.readlines(), 
str.split(), etc.  Please help me with this little challenge.

Angelica.

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