title: How find difference of two text files in s3 using lambda services
body: <p>I have to compare two files in aws s3 bucket and generate a new file with only the difference. </p>
  
  <p>I have tried to do using Java, NodeJs and Python, but i couldn't find way to do that.For example we have some libraries in nodejs and python, but it requires input as 'path', but when you retrieve from s3 bucket its coming in different format.</p>