I'm trying to figure out a way to create dynamic lists or possibly antother solution for the following problem. I have multiple lines in a text file (every line is the same format) that are iterated over and which need to be compared to previous lines in the file in order to perform some simple math. Each line contains 3 fileds: a descriptor and two integers. Here is an example:
rose, 1, 500 lilac, 1, 300 lilly, 1, 400 rose, 0, 100 The idea is that the 0/1 values are there to let the program know wether to add or subtract the second integer value for a specific descriptor (flower in this case). So the program comes upon rose, adds the 500 to an empty list, waits for the next appearance of the rose descriptor and then (in this case) subtracts 100 from 500 and prints the value. If the next rose was a 1 then it would have added 100. I'm uncertain on how to approach doing this though. My idea was to somehow be able to create lists dynamically upon each new occurence of a descriptor that currently has no list and then perform the calculations from there. Unfortunately, the list of descriptors is potentially infinte, so I'm unable to previously create lists with the descriptor names. Could anyonw give any suggestions on how to best approach this problem, hopefully I've been clear enough? Any help would be very gratly appreciated. Best regards, Lorn -- http://mail.python.org/mailman/listinfo/python-list
