Ansible expect module error

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Hello,




I use Ansible 2.2.1.0


I try to use ansible expect module with a command:
    expect:
        command: set password of database
        responses:
            Admin Password for db_name: 'admin'
            Admin Password Confirmation: 'admin'

I receive this error:

fatal: [subdomain.xxxx.com]: FAILED! => {"changed": false, "failed": true, "module_stderr": "Connection to sante.c3-bs.com closed.\r\n", "module_stdout": "Traceback (most recent call last):\r\n  File \"/tmp/ansible_ys2qrkdy/ansible_module_expect.py\", line 237, in <module>\r\n    main()\r\n  File \"/tmp/ansible_ys2qrkdy/ansible_module_expect.py\", line 149, in main\r\n    response = u'%s\n' % value.rstrip('\n').decode()\r\nAttributeError: 'str' object has no attribute 'decode'\r\n", "msg": "MODULE FAILURE"}

I don't understand this error can someone help me and give me the right 
responses or right syntaxe for expect command?