read .txt file from s3 bucket not returning all file content-CodePudding

I am trying to read a .txt file content from s3 bucket and return all its lines. I managed to do it this way:

s3 = boto3.resource('s3')
res = s3_client.Object(bucket_name, key_name)
    

data = res.get()['Body'].read().decode('utf-8').splitlines()

    
for i in data:
        
   print(i)

It printing content but it only prints the 30 last lines and I wanted it to return all of its content.

CodePudding user response：

CloudWatch Logs for this Lambda function should be the definitive view of the printed logs.

Your code looks to be correct - the read function on StreamingBody returns all data (if you don't specify an amount parameter), so I don't think there's a problem with your code. It is receiving the entire file contents.

It looks like the truncated view you are seeing in the Lambda console may simply be a limitation of the console, in order to avoid showing an overwhelming number of lines of output.