S3 buckets with Boto3

Create a Bucket:

In your python file first import boto3 then create a low-level s3 client.

import boto3


client = boto3.client('s3')
client.create_bucket(
  Bucket='my-bucket-name', 
  CreateBucketConfiguration={
    'LocationConstraint': 'ap-east-1'
  }
)

To apply a Bucket Policy:

import boto3
import json

my_bucket_policy = {
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "AddPerm",
            "Effect": "Allow",
            "Principal": "*",
            "Action": [
                "s3:DeleteObject",
                "s3:GetObject",
                "s3:PutObject"
            ],
            "Resource": ["arn:aws:s3:::my-bucket-name/*"]
        }
    ]
}

my_policy_string = json.dumps(my_bucket_policy)

client = boto3.client('s3')
client.put_bucket_policy(
    Bucket='my-bucket-name',
    Policy=my_policy_string
)

Configure Server-side Encryption on the bucket

import boto3

client = boto3.client('s3')
client.put_bucket_encryption(
    Bucket='my-bucket-name',
    ServerSideEncryptionConfiguration={
        'Rules': [
            {
                'ApplyServerSideEncryptionByDefault': {
                    'SSEAlgorithm': 'AES256'
                }
            }
        ]
    }
)

List Buckets

import boto3

client = boto3.client('s3')
bucket_list = client.list_buckets()
    for bucket in bucket_list['Buckets']:
        print(f'{bucket["Name"]}')

Delete a Bucket

import boto3

client = boto3.client('s3')
client.delete_bucket(Bucket='my-bucket-name')

Uploading files

import boto3
import os

file_name = 'sample1.txt'
file_path = os.path.dirname(__file__) + '/' + file_name

client = boto3.client('s3')
client.upload_file(file_path, 'my-bucket-name, file_name)