S3 giving me NoSuchKey error even when the key exists

Question

This is my boto3 command for getting the object with a specific key from an S3 bucket:

resp = s3client.get_object(Bucket=\'<>-<>\', Key=\'MzA1MjY1Nzkz         


        

Answer 1

A generic answer that may useful to those who are thinking about file paths and may be new to the AWS S3 terminology. Not getting the "name" and "key" right will often lead to an exception with the message An error occurred (NoSuchKey)... as posted in this question.

Let's say that you have a JPEG file stored in some "path" in a bucket. Navigating to this object on the AWS console shows the S3 URI to be:

s3://my-bucket/some/very/long/path/my-image.jpeg

You could read the my-image.jpeg object in Python with this basic example:

import boto3

s3client = boto3.client('s3', region_name='us-east-1')

bucket_name = 'my-bucket'
object_key = 'some/very/long/path/my-image.jpeg'

try:
    s3obj = s3client.get_object(Bucket=bucket_name, Key=object_key)
except Exception as e:
    print(f"Error reading key {object_key} from bucket {bucket_name}: {e}")
else:
   print(f"Got object: {s3obj}")