无法在AWS Lambda(Python)中导入模块 [英] Unable to import module in AWS Lambda (Python)

问题描述

我有一个名为foo.py的python脚本.它具有如下定义的lambda处理函数:

I have a python script named foo.py. It has a lambda handler function defined like this:

def handler(event, context):
    for record in event['Records']:
        bucket = record['s3']['bucket']['name']
        key = record['s3']['object']['key']
        download_path = '/tmp/{}.gz'.format(key)
        csv_path = '/tmp/{}.csv'.format(key)
        ... proceed to proprietary stuff

这是一个zip文件，如下所示:

This is in a zip file like so:

-foo.zip
    -foo.py
    -dependencies

我已将此zip文件上传到AWS Lambda并配置了一个AWS Lambda Function以运行foo.handler.但是，每次测试时，都会得到"errorMessage": "Unable to import module 'foo'".

I have uploaded this zip file to AWS Lambda and configured an AWS Lambda Function to run foo.handler. However, every time I test it, I get "errorMessage": "Unable to import module 'foo'".

有什么想法吗?

stat --format '%a' foo.py显示664

推荐答案

因此，我在lambda函数中导入了psycopg2，该函数需要libpq.so，该函数随Postgres一起安装. Postgres未安装在lambda环境中，因此导入psycopg2失败，这意味着，从扩展角度看，Amazon导入我的lambda函数也失败了.但是，这不是一个非常有用的错误消息.

So, I was importing psycopg2 in my lambda function, which requires libpq.so, which installs with Postgres. Postgres isn't installed in the lambda environment, so importing psycopg2 failed, which meant that, by extension, Amazon's import of my lambda function also failed. Not a very helpful error message, though.

非常感谢，有人构建了与AWS lambda兼容的psycopg2版本: https://github .com/jkehler/awslambda-psycopg2

Thankfully, somebody's built a version of psycopg2 that works with AWS lambda: https://github.com/jkehler/awslambda-psycopg2

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