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我正在使用 AWS CodeStar (Lambda + API Gateway) 来构建我的无服务器 API。我的 lambda 函数在 Lambda 控制台中运行良好，但是当我在 AWS CodeStar 上运行代码时奇怪地抛出了这个错误：

“消息”：“内部服务器错误”

请帮我解决这个问题。

import json
import os
import bz2
import pprint
import hashlib
import sqlite3
import re
from collections import namedtuple
from gzip import GzipFile
from io import BytesIO
from botocore.vendored import requests
import logging

logger = logging.getLogger()
logger.setLevel(logging.DEBUG)

def handler(event, context):

    logger.info('## ENVIRONMENT VARIABLES')
    logger.info(os.environ)
    logger.info('## EVENT')
    logger.info(event)



    n = get_package_list()
    n1 = str(n)

    dat = {"total_pack":n1}
    return {'statusCode': 200,
            'headers': {'Content-Type': 'application/json'},
            'body': json.dumps(dat)
    }


def get_package_list():

    url = "http://amazonlinux.us-east-2.amazonaws.com/2/core/2.0/x86_64/c60ceaf6dfa3bc10e730c9e803b51543250c8a12bb009af00e527a598394cd5e/repodata/primary.sqlite.gz"

    db_filename = "dbfile"


    resp = requests.get(url, stream=True)
    remote_data = resp.raw.read()

    cached_fh = BytesIO(remote_data)
    compressed_fh = GzipFile(fileobj=cached_fh)

    with open(os.path.join('/tmp',db_filename), "wb") as local_fh:
        local_fh.write(compressed_fh.read())

    package_obj_list = []

    db = sqlite3.connect(os.path.join('/tmp',db_filename))

    c = db.cursor()

    c.execute('SELECT name FROM packages')
    for package in c.fetchall():
        package_obj_list.append(package)


    no_of_packages = len(package_obj_list)

    return no_of_packages

预期结果：应该返回一个整数 ( no_of_packages)。

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