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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 open(self, section_index=0):
 """Launch a help section."""

        uri = self._sections[section_index][1]
        if len(uri.split()) == 1:
            self._open_url(uri)
        else:
            if self._verbose:
                print "running command: %s" % uri
            p = popen(uri, shell=True)
            p.wait()