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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 _clean_line(self, l):
        '''this will return a line with obfuscations for all possible variables, hostname, ip, etc.'''

        new_line = self._sub_ip(l)                  # IP substitution
        new_line = self._sub_hostname(new_line)     # Hostname substitution
        new_line = self._sub_keywords(new_line)     # Keyword Substitution

        return new_line