def extend(self, other, full_request_history=False):
        """
        Extend the data fro the current StatsEntry with the stats from another
        StatsEntry instance. 
        
        If full_request_history is False, we'll only care to add the data from 
        the last 20 seconds of other's stats. The reason for this argument is that 
        extend can be used to generate an aggregate of multiple different StatsEntry 
        instances on the fly, in order to get the *total* current RPS, average 
        response time, etc.
        """
        self.last_request_timestamp = max(self.last_request_timestamp, other.last_request_timestamp)
        self.start_time = min(self.start_time, other.start_time)

        self.num_requests = self.num_requests + other.num_requests
        self.num_failures = self.num_failures + other.num_failures
        self.total_response_time = self.total_response_time + other.total_response_time
        self.max_response_time = max(self.max_response_time, other.max_response_time)
        self.min_response_time = min(self.min_response_time, other.min_response_time) or other.min_response_time
        self.total_content_length = self.total_content_length + other.total_content_length

        if full_request_history:
            for key in other.response_times:
                self.response_times[key] = self.response_times.get(key, 0) + other.response_times[key]
            for key in other.num_reqs_per_sec:
                self.num_reqs_per_sec[key] = self.num_reqs_per_sec.get(key, 0) +  other.num_reqs_per_sec[key]
        else:
            # still add the number of reqs per seconds the last 20 seconds
            for i in xrange(other.last_request_timestamp-20, other.last_request_timestamp+1):
                if i in other.num_reqs_per_sec:
                    self.num_reqs_per_sec[i] = self.num_reqs_per_sec.get(i, 0) + other.num_reqs_per_sec[i]
dataset/ETHPy150Open locustio/locust/locust/stats.py/StatsEntry.extend/original