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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def prop_set(prop, value, extra_args=None, cibfile=None):
    '''
    Set the value of a cluster property

    prop
        name of the property
    value
        value of the property prop
    extra_args
        additional options for the pcs property command
    cibfile
        use cibfile instead of the live CIB

    CLI Example:

    .. code-block:: bash

        salt '*' pcs.prop_set prop='no-quorum-policy' value='ignore' cibfile='/tmp/2_node_cluster.cib'
    '''
    return item_create(item='property',
                       item_id='{0}={1}'.format(prop, value),
                       item_type=None,
                       create='set',
                       extra_args=extra_args,
                       cibfile=cibfile)