To get a giant copy/pastable list, you can just use listaddresses() in the console (note, this includes ALL the addresses including change addresses and already used addresses)
There are probably other console commands that might be helpful, but I've only just started to delve into the Electrum console environment
"for x in range(0, 50):
print wallet.create_new_address(False)"
How we can apply or type this command to receive almost 50 address in one wallet?
The console in Electrum is pretty much an interactive Python mode... so you can type in various Python commands/code... so you simply type the commands into the console.
Also, if you (or anyone reading this) should choose to do this... please take note of the warning on that link: