Read File Text From AWS S3

Description: A useful function for Lambda functions in AWS. It reads a text file from the provided bucket and path. It requires both boto3 and the botocore packages to be imported.
Tested Platform: Python 3.11
Language: Python
import boto3
import botocore

def get_file_text_from_s3(bucket_name, s3_path, filename):
    """Gets a file from AWS s3 and returns its text. Make sure it has IAM permissions to access file."""
    if not filename or not isinstance(filename, str):
        raise Exception('Filename must be a non-empty string.')
    s3_path = s3_path + filename

        s3 = boto3.client('s3')

        obj = s3.get_object(Bucket=bucket_name, Key=s3_path)
        return obj['Body'].read().decode('utf-8')
    except botocore.exceptions.ClientError as error:
        # Maybe log the error here
        return False

Posted: March 21, 2023

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