Model/utils/s3.py

import boto3
from botocore.exceptions import NoCredentialsError, PartialCredentialsError


def read_from_s3(bucket_name, s3_file_name):
    """
    Read an object from s3. Decoding of the data is left for outside of this function

    :param bucket_name: The name of the S3 bucket
    :param s3_file_name: The file name to use for the saved data in S3
    """
    # Initialize a session using Amazon S3
    s3 = boto3.resource('s3')

    # Get the MessagePack data from S3
    obj = s3.Object(bucket_name, s3_file_name)
    data = obj.get()['Body'].read()

    return data


def save_data_to_s3(data, bucket_name, s3_file_name):
    """
    Save an object to an S3 bucket

    :param data: The data to save
    :param bucket_name: The name of the S3 bucket
    :param s3_file_name: The file name to use for the saved data in S3
    """
    # Ensure you have AWS credentials set up - either via environment variables, AWS CLI, or IAM roles
    try:
        s3 = boto3.client('s3')
    except NoCredentialsError:
        print("Credentials not available.")
        return
    except PartialCredentialsError:
        print("Incomplete credentials provided.")
        return

    try:
        s3.put_object(Bucket=bucket_name, Key=s3_file_name, Body=data)
        print(f'Successfully uploaded data to {bucket_name}/{s3_file_name}')
    except Exception as e:
        print(f'Failed to upload data to {bucket_name}/{s3_file_name}: {str(e)}')