I am searching for the solution over the internet on How to transfer bitcoin wallet from Armory to Electrum?
If you don't have Bitcoin Core synced then you can export all of the private keys corresponding to addresses which have some coins. HCP
wrote a short guide on how to do it. Once you export them, create a new wallet in Electrum, select "Import Bitcoin Addresses or Private Keys" and paste your keys there in separate lines.
The link you provide only show, the part of Armory. But I also need the part of Electrum to use that code of Armory.