(Dec-20-2018, 01:30 PM)davidm Wrote: I already have a csv file going back a few years, so presumably I can forget collections.defaultdictNo, my understanding is each day is a row. So, you will need to parse the file and create some data structure that will store all the numbers for given month (and year?). That's where the defaultdict comes handy.
Again, this is if you are not going to use pandas
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How to Ask Questions The Smart Way: link and another link
Create MCV example
Debug small programs