cant sign a message with electrum

[drdops]

Im using electrum as a wallet-  a seedless wallet version ( it can receive bitcoin but not send). To send i need to go to an offline pc that i have and import raw data etc..
How do I send a signed message from my original sending address ? ( Ican see the address in receive tab)
I have right clicked on the address and select 'sign message' then filled in message details- what do i put in the signature section?
When I hit sign I get- 'NoneType' object has no attribute'_getitem_'

Thanks

[Abdussamad]

You can't sign without the private key. So you need to use the offline computer.

[pinoye]

I also have a question about signing message in the console of electrum.
I tried the function
signmessage()
which suggest 3 arguments have to be given. I wonder which 3?
I tried
signmessage(address, message), but return a false response.
I check documentation web of electrum.org, as well as google, without luck no information provided.

Could anyone show how to use signmessage() function in the console?

[dserrano5]

Could anyone show how to use signmessage() function in the console?

Code:

>> signmessage ('1abc...', 'message')

Yeah two arguments actually. Some Python internals are exposed in this console.

[pinoye]

Code:

>> signmessage ('1abc...', 'message')

Yeah two arguments actually. Some Python internals are exposed in this console.

It helps, thanks a lot.