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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 element_not_focused(step, id):
 """ Check if the element is not focused """


    elem = world.browser.find_element_by_xpath(str('id("{id}")'.format(id=id)))
    focused = world.browser.switch_to_active_element()

    assert_false(step, elem == focused)