hi @Marvin, i want to download the code of my deployment from my s3 bucket. The code is in the bucket inside a zip folder, can we do that? can you tell me which code to use?

Although the code example I retrieved does not specifically address downloading from an S3 bucket, I can provide you with Python code that uses the

boto3

library to download a zip file from an S3 bucket. This is a typical approach for interacting with AWS S3 in Python. Here is an example snippet that you can use within a Prefect flow:

python
import boto3
from botocore.exceptions import NoCredentialsError

def download_file_from_s3(bucket_name, s3_file_key, local_file_path):
    s3 = boto3.client('s3')
    try:
        s3.download_file(Bucket=bucket_name, Key=s3_file_key, Filename=local_file_path)
        print(f"Download successful: {local_file_path}")
    except FileNotFoundError:
        print("The file was not found")
    except NoCredentialsError:
        print("Credentials not available")

@flow
def download_zip_from_s3_flow():
    bucket_name = 'your-bucket-name'  # replace with your bucket name
    s3_file_key = 'path/to/your/file.zip'  # replace with the key of your zip file
    local_file_path = 'path/to/your/local/dir/file.zip'  # replace with where you want to store the file
    
    download_file_from_s3(bucket_name, s3_file_key, local_file_path)

download_zip_from_s3_flow()

This flow defines a task that uses

boto3

to download a file from an S3 bucket. Make sure to replace

'your-bucket-name'

,

'path/to/your/file.zip'

, and

'path/to/your/local/dir/file.zip'

with the appropriate values for your scenario. In order to use

boto3

, you will need to install the library (if it's not already installed) and configure your AWS credentials. To install

boto3

, you can use pip:

bash
pip install boto3

For AWS credentials, ensure you have properly configured your

~/.aws/credentials

file or have set environmental variables in compliance with

boto3

documentation. Please refer to Boto3 Documentation for more information on setting up AWS credentials.

@Marvin also can you unzip the zip file? and can you choose the the first *.zip file in the s3 bucket?

It appears I haven't received a specific example of unzipping files or selecting the first

.zip

file in an S3 bucket from the given resource. However, I can guide you through the steps to achieve this within a Prefect flow, including the Python code required for unzipping and selecting the file. First, let's modify the code to include a function to unzip a file using the

zipfile

module and a function to list and find the first

.zip

file in the S3 bucket using `boto3`:

python
import boto3
import zipfile
import os
from prefect import flow

def unzip_file(zip_path, extract_path):
    with zipfile.ZipFile(zip_path, 'r') as zip_ref:
        zip_ref.extractall(extract_path)
    print(f"Unzipped the file to {extract_path}")

def get_first_zip_file(bucket_name):
    s3 = boto3.client('s3')
    response = s3.list_objects_v2(Bucket=bucket_name, Prefix="", Delimiter="/")
    
    for obj in response.get('Contents', []):
        key = obj['Key']
        if key.lower().endswith('.zip'):
            return key  # return the first .zip file
    return None  # no .zip file found

def download_file_from_s3(bucket_name, s3_file_key, local_file_path):
    s3 = boto3.client('s3')
    s3.download_file(Bucket=bucket_name, Key=s3_file_key, Filename=local_file_path)
    print(f"Downloaded {s3_file_key} to {local_file_path}")

@flow
def s3_zip_handling_flow():
    bucket_name = 'your-bucket-name'  # replace with your bucket name
    local_dir = 'path/to/your/local/dir'  # replace with the desired local directory to store the file
    
    zip_key = get_first_zip_file(bucket_name)
    
    if zip_key:
        local_zip_path = os.path.join(local_dir, os.path.basename(zip_key))
        download_file_from_s3(bucket_name, zip_key, local_zip_path)
        unzip_file(local_zip_path, local_dir)
    else:
        print("No zip files found.")

s3_zip_handling_flow()

This Prefect flow performs the following steps: 1. It lists the objects in the S3 bucket and selects the first

.zip

file it encounters. 2. It downloads the

.zip

file to a specified local directory. 3. It unzips the downloaded file into that local directory. Before running this flow, make sure to have

boto3

installed for AWS interactions and have your AWS credentials configured properly. For unzipping functionality, Python's built-in

zipfile

module is used, which should already be available in your Python environment. Replace

'your-bucket-name'

and

'path/to/your/local/dir'

with the appropriate values for your situation. To execute these operations, you'll run the

s3_zip_handling_flow

function, which calls the appropriate tasks in sequence.