AWS Lambda是一种无服务器计算服务，它提供了处理Web应用程序和后端服务的能力。在Lambda中，限流是一项重要的任务，因为它可以帮助您管理资源和保持应用程序的可用性。

分布式速率限制器是一种可以帮助您通过跨多个Lambda实例来限制请求速率的解决方案。以下示例使用Redis作为分布式存储，并使用Python实现限流器。

首先，您需要在AWS Lambda中安装Redis客户端。以下是用于安装依赖项的示例代码：

AWSTemplateFormatVersion: '2010-09-09'
Resources:
  LambdaExecutionRole:
    Type: 'AWS::IAM::Role'
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: 'Allow'
            Principal:
              Service:
                - 'lambda.amazonaws.com'
            Action:
              - 'sts:AssumeRole'
      Path: '/'
      Policies:
        - PolicyName: 'root'
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
              - Effect: 'Allow'
                Action:
                  - 'logs:CreateLogGroup'
                  - 'logs:CreateLogStream'
                  - 'logs:PutLogEvents'
                Resource: 'arn:aws:logs:*:*:*'
              - Effect: 'Allow'
                Action:
                  - 'ec2:CreateNetworkInterface'
                  - 'ec2:DescribeNetworkInterfaces'
                  - 'ec2:DeleteNetworkInterface'
                Resource: '*'
  InstallRedisDependenciesFunction:
    Type: 'AWS::Lambda::Function'
    Properties:
      Handler: index.lambda_handler
      Role: !GetAtt LambdaExecutionRole.Arn
      MemorySize: 128
      Timeout: 30
      Runtime: python3.6
      Code:
        ZipFile: |
          import subprocess
          subprocess.run(["pip","install","redis","-t","python"])
      Tags:
        Project: 'MyProject'

接下来，您