Retrieving Lambda environment variables - Amazon Lambda
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Retrieving Lambda environment variables

To retrieve environment variables in your function code, use the standard method for your programming language.

Node.js
let region = process.env.AWS_REGION
Python
import os
  region = os.environ['AWS_REGION']
Note

In some cases, you may need to use the following format:

region = os.environ.get('AWS_REGION')
Ruby
region = ENV["AWS_REGION"]
Java
String region = System.getenv("AWS_REGION");
Go
var region = os.Getenv("AWS_REGION")
C#
string region = Environment.GetEnvironmentVariable("AWS_REGION");
PowerShell
$region = $env:AWS_REGION

Lambda stores environment variables securely by encrypting them at rest. You can configure Lambda to use a different encryption key, encrypt environment variable values on the client side, or set environment variables in an Amazon CloudFormation template with Amazon Secrets Manager.