How to automate xml file editing for Yandex.Market and similar stores?

Question

Yandex Market

A site on the tiu.ru service will not get into the code. There is an xml upload for Yandex.Market. But the upload functionality is very limited, you have to open the file and manually edit each product.
How to automate?
Option 1.
Unloading (this can be done by hand) from tiu.ru, and after that, changing the name, description, picture in the file, in short, drive everything into a human form for Yandex.Market, without much.
Option 2.
We have 2 files, the file was generated manually once and automatically uploaded - price comparison, price change in the manual file.
Now there are 400 products manually, at the slightest change in price, working with the file turns into a headache.

Answer 1

Create a website on any free engine in one day on a ready-made template. It will turn out no worse than the tiu.ru page
Most CMS already have ready-made components for uploading YML, possibly for analyzing and comparing API with the market
. Or write to the PM
In any case, making crutches for tiu.ru does not make sense. It's better to automate your site.