Capabilities of python

What  special things can be done using python?

Recently I happen to  analyse a set of csv files atleast 100.

Each file contains several fields- variables, among them the most is the purchaser Id, purchase date .

The task is,

List all the purchaser’s id and find them in the successive date  files, to identify whether the purchaser has visited again.

If available list the dates and the value of all purchases he has made.

The illustration

Day1 – 01-12-2018

Ids          value of purchase

123         10

234         15

456         25

Get the summary – 3 customers , Rs 50 /-

Find these ids in the next day – 02-12-2018

If available get the summary- only one purchaser id is available – value is  Rs 20

Extend this for the next 99 days. This is cycle 1.

Pick up the list of purchasers in the day 2 and continue this process for the next 98 days.

WoW , what a wonderful tool is this ?

It is calculating the number of files available, running  the iterations – say 100 factorial, tabulating   summarizing  the results  as output in excel format, and what else, the capability is still more.