将CSV从S3上传到AWS Lambda时出错:TypeError:“模块”对象不可调用

我试图将一个csv从S3上传到Lambda进行简单处理,但收到了“errorMessage”:“'module'对象不可调用”。

我使用的是Python3.8,这是一个简单的Lambda函数:

import boto3
s3_client = boto3("s3")
def readindata(event, context):
    bucket_name = event['Records'][0]['s3']['bucket']['name']
    s3_file_name =  event['Records'][0]['s3']['object']['key']
    resp = s3_client.get_object(Bucket=bucket_name,Key=s3_file_name)
    data = resp['Body'].read().decode("utf-8")
    print(data)

我为此使用了无服务器和CloudFormation,但Yaml文件也很简单:

service: readincsvdata2
# app and org for use with dashboard.serverless.com
#app: your-app-name
#org: your-org-name

# You can pin your service to only deploy with a specific Serverless version
# Check out our docs for more details
# frameworkVersion: "=X.X.X"

provider:
  name: aws
  runtime: python3.8
  region: us-east-1
  profile: serverless-admin
  timeout: 10
  memorySize: 128
  iamRoleStatements:
   - Effect: "Allow"
     Action:
       - "s3:*"
     Resource: "*"


custom:
  bucket: prototypeuploadcsv-08-13-2020v2
  pythonRequirements:
   dockerizePip: true

functions:
  protomodel-readcsv:
    handler: handler.readindata
    events:
      - s3:
          bucket: ${self:custom.bucket}
          event: s3:ObjectCreated:*

我不断地得到这个 错误:

Response:
{
  "errorMessage": "'module' object is not callable",
  "errorType": "TypeError",
  "stackTrace": [
    "  File \"/var/lang/lib/python3.8/imp.py\", line 234, in load_module\n    return load_source(name, filename, file)\n",
    "  File \"/var/lang/lib/python3.8/imp.py\", line 171, in load_source\n    module = _load(spec)\n",
    "  File \"<frozen importlib._bootstrap>\", line 702, in _load\n",
    "  File \"<frozen importlib._bootstrap>\", line 671, in _load_unlocked\n",
    "  File \"<frozen importlib._bootstrap_external>\", line 783, in exec_module\n",
    "  File \"<frozen importlib._bootstrap>\", line 219, in _call_with_frames_removed\n",
    "  File \"/var/task/handler.py\", line 3, in <module>\n    s3_client = boto3(\"s3\")\n"
  ]
}

Request ID:

我似乎调用或实例化了一个错误的对象,但我没有看到它。我只是使用一个超级简单的测试csv作为测试数据。不确定需要改变什么。