human
Solve the following python programming problem given the following code:
def __get_conn() : 
    '
    Detects what type of dom this node is and attempts to connect to the
    correct hypervisor via libvirt.
    ' 
    def __esxi_uri() : 
        '
        Connect to an ESXi host with a configuration like so:

        .. code-block:: yaml

            libvirt:
              hypervisor: esxi
              connection: esx01

        The connection setting can either be an explicit libvirt URI,
        or a libvirt URI alias as in this example. No, it cannot be
        just a hostname.

        Example libvirt `/etc/libvirt/libvirt.conf`:

        .. code-block::

            uri_aliases = [
              "esx01=esx://10.1.1.101/?no_verify=1&auto_answer=1",
              "esx02=esx://10.1.1.102/?no_verify=1&auto_answer=1",
           ]

        Reference:

         - http://libvirt.org/drvesx.html#uriformat
         - http://libvirt.org/uri.html#URI_config
        ' 
        connection = __salt__ ['config.get'] ('libvirt:connection', 'esx') 
        return connection 
def __esxi_auth() : 
        '
        We rely on that the credentials is provided to libvirt through
        its built in mechanisms.

        Example libvirt `/etc/libvirt/auth.conf`:

        .. code-block::

            [credentials-myvirt]
            username=user
            password=secret

            [auth-esx-10.1.1.101]
            credentials=myvirt

            [auth-esx-10.1.1.102]
            credentials=myvirt

        Reference:

          - http://libvirt.org/auth.html#Auth_client_config
        ' 
        return [[libvirt.VIR_CRED_EXTERNAL], (lambda : 0), None] 
if ('virt.connect' in __opts__) : 
        conn_str = __opts__ ['virt.connect'] 
else : 
        conn_str = 'qemu:///system' 
conn_func = { 
        'esxi' : [libvirt.openAuth, [__esxi_uri (), __esxi_auth (), 0]], 
        'qemu' : [libvirt.open, [__esxi_uri]], 
} 
    hypervisor = __salt__ ['config.get'] ('libvirt:hypervisor', 'qemu') 
    try : 
        conn = conn_func [hypervisor] [0] (* conn_func [hypervisor] [1]) 
except Exception : 
...

    
    

    Fix the buggy line: 'qemu' : [libvirt.open, [__esxi_uri]] ,
assistant
#Here is Python code to fix the buggy line: 'qemu' : [libvirt.

'qemu' : [libvirt.open, [conn_str]] ,