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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 plugin(name):
 """Executes the selected plugin Plugins are expected to be found in the kitchen's 'plugins' directory """

    env.host_string = lib.get_env_host_string()
    plug = lib.import_plugin(name)
    lib.print_header("Executing plugin '{0}' on "
                     "{1}".format(name, env.host_string))
    node = lib.get_node(env.host_string)
    if node == {'run_list': []}:
        node['name'] = env.host_string
    plug.execute(node)
    print("Finished executing plugin")