Switch between interactive and non-interactive mode in pexpect

I am using pexpect to upload a file to SFTP server. For accesssing the server first time, I get message as The authenticity of host..can't be established.Are you sure you want to continue connecting (yes/no)?

to which I want the user to interact and answer yes/no. However, when user says yes, I want the interactive mode to be off and then take the password from my script instead of prompting user. Is this possible using pexpect ?

p = spawn('XXXXXXXX')
password = 'XXXXXXXXx'
out=p.expect(['(?i)password:', '(?i)Are you sure you want to continue connecting (yes/no)?']

if out == 1:
   p.interact()
   
# Script should continue to send password and upload file

But this goes into interactive mode and doesn't come back to script

Pls. note - I run this python script in my terminal.

If not pexpect, pls.propose a solution not based on paramiko, pysftp

from Switch between interactive and non-interactive mode in pexpect