Dear Ganesh ,

It's absolutely ok if you want to learn python even you're from commerce field and pursuing B.com (//B.com) . As  you know, education has no boundaries , similarly with the help of Open resources .. you can choose to learn python .

But , if you want to get a job in IT field .. most of the companies in this case prefer candidates from an IT related academic background . (not all companies, you can search for this in Google)

With an M.C.A or M.Sc Comp sc degree , you'll be eligible to get a job in It sectors with a good job position .

Hope this helps !