Lambda + Python +退出代码

zop*_*oph 2 python amazon-web-services aws-lambda

我遇到了一个用Python编写的简单AWS Lambda函数的问题。

当我运行Lambda函数时,我的代码正在按预期运行,结果是正确的,但仍然以错误代码(退出代码)结尾:"Process exited before completing request",这导致Lambda运行3次(异步)。

您是否有最佳实践来管理Lambda的退出代码?

#!/usr/bin/python

import boto3
import sys
import tweepy
import datetime

session = boto3

# Init s3 client
s3 = session.resource('s3')

def get_data_and_push(s3_bucket, s3_key, user):
    # Retrieve CSV file
    try:
        dest = s3.Object(s3_bucket, s3_key)
        dest.download_file(tmpfile)
    except Exception, e:
        print 'An error occured while trying to download CSV file'
        print 'This exception has been thrown :'
        print e
        sys.exit(1)

    # Authenticate to Twitter
    try:
        auth = tweepy.OAuthHandler(t_consumer_key, t_consumer_secret)
        auth.set_access_token(t_access_token_key, t_access_token_secret)
        api = tweepy.API(auth)
    except Exception, e:
        print 'Cannot authenticate to Twitter.'
        print 'This exception has been thrown :'
        print e
        sys.exit(2)

    data = api.get_user(user)
    print 'User : ' + data.screen_name
    print 'Followers : ' + str(data.followers_count)
    print 'Friends : ' + str(data.friends_count)
    print '-----------'

    # Get today's date
    today = datetime.datetime.now().strftime("%Y-%m-%d")

    # Write result
    try:
        # Write result at the end of the file
        file = open(tmpfile, 'a')
        file.write(today + ',' + str(data.followers_count) + ',' + str(data.friends_count)+ '\n')
        file.close()
    except Exception, e:
        print 'Unable to write in temp file'
        print 'This exception has been thrown :'
        print e
        sys.exit(5)

    # Upload final file
    try:
        # Push file to S3
        dest.upload_file(tmpfile)
    except Exception, e:
        print 'An error occured while trying to upload CSV file'
        print 'This exception has been thrown :'
        print e
        sys.exit(6)

def main(event, context):
    for user in userlist:
        get_data_and_push(bucket, 'export_' + user + '.csv', user)
    sys.exit(0)
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谢谢你的帮助,

Léo*_*din 6

是的,删除sys.exit(0)代码末尾的,应该这样做:-)


长一点

通过这样做,sys.exit(0)您实际上停止了在Lambda函数中运行代码的过程。执行者不希望这样做。

我假设Lambda函数的处理程序实际上是在AWS的框架内运行的。因此,您已经处于python进程中,并且在AWS代码中的某个地方调用了处理程序。因此,如果退出该流程,则实际上是简化了AWS的框架,该框架无法处理Lambda执行的解析。