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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 get_error(self, errstr):
        '''
        Parse out an error and return a targeted error string
        '''
        for line in errstr.split('\n'):
            if line.startswith('ssh:'):
                return line
            if line.startswith('Pseudo-terminal'):
                continue
            if 'to the list of known hosts.' in line:
                continue
            return line
        return errstr