def alert(alertText='', alertHeading='', extraPadding=False, alertLevel=
    'warning'):
    """ *Generate a alert - TBS style*

    **Key Arguments:**
        - ``alertText`` -- the text to be displayed in the alert
        - ``extraPadding`` -- for longer messages, increase the padding on the top and bottom of the alert wrapper
        - ``alertLevel`` -- the level of the alert [ "warning" | "error" | "success" | "info" ]

    **Return:**
        - ``alert`` -- the alert """
    falseList = [extraPadding]
    for i in range(len(falseList)):
        if not falseList[i]:
            falseList[i] = ''
    [extraPadding] = falseList
    if alertLevel == 'default':
        alertLevel = ''
    else:
        alertLevel = 'alert-%(alertLevel)s' % locals()
    if extraPadding:
        extraPadding = 'alert-block'
        alertHeading = '<h4>%(alertHeading)s</h4>' % locals()
    else:
        alertHeading = '<strong>%(alertHeading)s</strong>' % locals()
    alert = (
        """
        <div class="alert %(extraPadding)s %(alertLevel)s">
          <button type="button" class="close" data-dismiss="alert">&times;</button>
          %(alertHeading)s %(alertText)s
        </div>"""
         % locals())
    return alert
