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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_process_log(self, pid=None, start=0, limit=1000):
        '''
        get_process_log(self, pid=None, start=0, limit=1000

        Get process logs

        :Parameters:
        * *pid* (`string`) -- Identifier of an existing process
        * *pid* (`string`) -- start index to retrieve logs from
        * *pid* (`string`) -- maximum number of entities to retrieve

        :return: Process log entries

        '''
        pid = self._get_pid(pid)
        data = self._call_rest_api('get', '/processes/'+pid+'/log?start={}&limit={}'.format(start,limit), error='Failed to fetch process log')
        return data['list']