我想从AWS下载以下内容的所有CloudWatch日志：

• 特定日志组
• 特定的时间范围

我的计划很简单：
1.迭代日志组的所有日志流。
1.对于每个日志流，迭代事件并生成所有日志事件的列表。

import boto3

def overlaps(start1, end1, start2, end2):
    return max(start1, start2) < min(end1, end2)

def load_logs(region, group, start=0, end=2672995600000):
    client = boto3.client('logs', region_name=region)
    paginator = client.get_paginator('describe_log_streams')

    response_iterator = paginator.paginate(logGroupName=group)
    events = []
    for page in response_iterator:
        for log_stream in page["logStreams"]:
            print(f"Stream: {log_stream['logStreamName']}, start: {log_stream['firstEventTimestamp']} end: {log_stream['lastEventTimestamp']}")
            if overlaps(log_stream["firstEventTimestamp"], log_stream["lastEventTimestamp"], start, end):
                print("processing")
                token = None
                while True:
                    event_args = {
                        "logGroupName": group,
                        "logStreamName": log_stream['logStreamName'],
                        "startTime": start,
                        "endTime": end
                    }

                    if token is not None:
                        event_args["nextToken"] = token

                    response = client.get_log_events(**event_args)

                    for event in response["events"]:
                        if start < event["timestamp"] < end:
                            events.append(event)

                    if response["nextBackwardToken"] == token:
                        break
                    else:
                        token = response["nextBackwardToken"]

    print(events)

我将0作为start传递，将未来的2672995600000作为end传递，并且下载了一些事件，但是events列表不包含所有日志事件。是否遗漏了某些迭代？我特别关注get_log_events迭代