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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 page_should_not_contain_text(self, text, loglevel='INFO'):

 """Verifies that current page not contains `text`.
 
 If this keyword fails, it automatically logs the page source
 using the log level specified with the optional `loglevel` argument.
 Giving `NONE` as level disables logging.
 """

        if self._is_text_present(text):
            self.log_source(loglevel)
            raise AssertionError("Page should not have contained text '%s'" % text)
        self._info("Current page does not contains text '%s'." % text)