ansible can complete the task you said.
if you want to use more python code to control the flow, you can use another automated deployment tool, fabric

-sharp!/usr/bin/python 

import sys
import pexpect

ip = sys.argv[1]
password = sys.argv[2]
expect_list = ['(yes/no)', 'password:']

p = pexpect.spawn('ssh-copy-id %s' % ip)
try:
    while True:
        idx = p.expect(expect_list)
        print p.before + expect_list[idx],
        if idx == 0:
            print "yes"
            p.sendline('yes')
        elif idx == 1:
            print password
            p.sendline(password)
except pexpect.TIMEOUT:
    print >>sys.stderr, 'timeout'
except pexpect.EOF:
    print p.before
    print >>sys.stderr, '<the end>'

problem solved