Python、Boto3、AWS S3：分かりやすい説明

import uuid
def create_bucket_name(bucket_prefix):
    # The generated bucket name must be between 3 and 63 chars long
    return ''.join([bucket_prefix, str(uuid.uuid4())])

s3_resource.create_bucket(Bucket=YOUR_BUCKET_NAME,
                          CreateBucketConfiguration={
                              'LocationConstraint': 'eu-west-1'})

def create_bucket(bucket_prefix, s3_connection):
    session = boto3.session.Session()
    current_region = session.region_name
    bucket_name = create_bucket_name(bucket_prefix)
    bucket_response = s3_connection.create_bucket(
        Bucket=bucket_name,
        CreateBucketConfiguration={
        'LocationConstraint': current_region})
    print(bucket_name, current_region)
    return bucket_name, bucket_response

>>> first_bucket_name, first_response = create_bucket(
...     bucket_prefix='firstpythonbucket',
...     s3_connection=s3_resource.meta.client)
firstpythonbucket7250e773-c4b1-422a-b51f-c45a52af9304 eu-west-1

>>> first_response
{'ResponseMetadata': {'RequestId': 'E1DCFE71EDE7C1EC', 'HostId': 'r3AP32NQk9dvbHSEPIbyYADT769VQEN/+xT2BPM6HCnuCb3Z/GhR2SBP+GM7IjcxbBN7SQ+k+9B=', 'HTTPStatusCode': 200, 'HTTPHeaders': {'x-amz-id-2': 'r3AP32NQk9dvbHSEPIbyYADT769VQEN/+xT2BPM6HCnuCb3Z/GhR2SBP+GM7IjcxbBN7SQ+k+9B=', 'x-amz-request-id': 'E1DCFE71EDE7C1EC', 'date': 'Fri, 05 Oct 2018 15:00:00 GMT', 'location': 'http://firstpythonbucket7250e773-c4b1-422a-b51f-c45a52af9304.s3.amazonaws.com/', 'content-length': '0', 'server': 'AmazonS3'}, 'RetryAttempts': 0}, 'Location': 'http://firstpythonbucket7250e773-c4b1-422a-b51f-c45a52af9304.s3.amazonaws.com/'}

>>> second_bucket_name, second_response = create_bucket(
...     bucket_prefix='secondpythonbucket', s3_connection=s3_resource)
secondpythonbucket2d5d99c5-ab96-4c30-b7f7-443a95f72644 eu-west-1

>>> second_response
s3.Bucket(name='secondpythonbucket2d5d99c5-ab96-4c30-b7f7-443a95f72644')

def create_temp_file(size, file_name, file_content):
    random_file_name = ''.join([str(uuid.uuid4().hex[:6]), file_name])
    with open(random_file_name, 'w') as f:
        f.write(str(file_content) * size)
    return random_file_name

first_file_name = create_temp_file(300, 'firstfile.txt', 'f')

first_bucket = s3_resource.Bucket(name=first_bucket_name)
first_object = s3_resource.Object(
    bucket_name=first_bucket_name, key=first_file_name)

first_object_again = first_bucket.Object(first_file_name)

first_bucket_again = first_object.Bucket()

s3_resource.Object(first_bucket_name, first_file_name).upload_file(
    Filename=first_file_name)

first_object.upload_file(first_file_name)

s3_resource.Bucket(first_bucket_name).upload_file(
    Filename=first_file_name, Key=first_file_name)

s3_resource.meta.client.upload_file(
    Filename=first_file_name, Bucket=first_bucket_name,
    Key=first_file_name)

s3_resource.Object(first_bucket_name, first_file_name).download_file(
    f'/tmp/{first_file_name}') # Python 3.6+

def copy_to_bucket(bucket_from_name, bucket_to_name, file_name):
    copy_source = {
        'Bucket': bucket_from_name,
        'Key': file_name
    }
    s3_resource.Object(bucket_to_name, file_name).copy(copy_source)

copy_to_bucket(first_bucket_name, second_bucket_name, first_file_name)

s3_resource.Object(second_bucket_name, first_file_name).delete()

second_file_name = create_temp_file(400, 'secondfile.txt', 's')
second_object = s3_resource.Object(first_bucket.name, second_file_name)
second_object.upload_file(second_file_name, ExtraArgs={
                          'ACL': 'public-read'})

second_object_acl = second_object.Acl()

>>> second_object_acl.grants
[{'Grantee': {'DisplayName': 'name', 'ID': '24aafdc2053d49629733ff0141fc9fede3bf77c7669e4fa2a4a861dd5678f4b5', 'Type': 'CanonicalUser'}, 'Permission': 'FULL_CONTROL'}, {'Grantee': {'Type': 'Group', 'URI': 'http://acs.amazonaws.com/groups/global/AllUsers'}, 'Permission': 'READ'}]

>>> response = second_object_acl.put(ACL='private')
>>> second_object_acl.grants
[{'Grantee': {'DisplayName': 'name', 'ID': '24aafdc2053d49629733ff0141fc9fede3bf77c7669e4fa2a4a861dd5678f4b5', 'Type': 'CanonicalUser'}, 'Permission': 'FULL_CONTROL'}]

third_file_name = create_temp_file(300, 'thirdfile.txt', 't')
third_object = s3_resource.Object(first_bucket_name, third_file_name)
third_object.upload_file(third_file_name, ExtraArgs={
                         'ServerSideEncryption': 'AES256'})

>>> third_object.server_side_encryption
'AES256'

third_object.upload_file(third_file_name, ExtraArgs={
                         'ServerSideEncryption': 'AES256',
                         'StorageClass': 'STANDARD_IA'})

>>> third_object.reload()
>>> third_object.storage_class
'STANDARD_IA'

def enable_bucket_versioning(bucket_name):
    bkt_versioning = s3_resource.BucketVersioning(bucket_name)
    bkt_versioning.enable()
    print(bkt_versioning.status)

>>> enable_bucket_versioning(first_bucket_name)
Enabled

s3_resource.Object(first_bucket_name, first_file_name).upload_file(
   first_file_name)
s3_resource.Object(first_bucket_name, first_file_name).upload_file(
   third_file_name)

s3_resource.Object(first_bucket_name, second_file_name).upload_file(
    second_file_name)

>>> s3_resource.Object(first_bucket_name, first_file_name).version_id
'eQgH6IC1VGcn7eXZ_.ayqm6NdjjhOADv'

>>> for bucket in s3_resource.buckets.all():
...     print(bucket.name)
...
firstpythonbucket7250e773-c4b1-422a-b51f-c45a52af9304
secondpythonbucket2d5d99c5-ab96-4c30-b7f7-443a95f72644

>>> for bucket_dict in s3_resource.meta.client.list_buckets().get('Buckets'):
...     print(bucket_dict['Name'])
...
firstpythonbucket7250e773-c4b1-422a-b51f-c45a52af9304
secondpythonbucket2d5d99c5-ab96-4c30-b7f7-443a95f72644

>>> for obj in first_bucket.objects.all():
...     print(obj.key)
...
127367firstfile.txt
616abesecondfile.txt
fb937cthirdfile.txt

>>> for obj in first_bucket.objects.all():
...     subsrc = obj.Object()
...     print(obj.key, obj.storage_class, obj.last_modified,
...           subsrc.version_id, subsrc.metadata)
...
127367firstfile.txt STANDARD 2018-10-05 15:09:46+00:00 eQgH6IC1VGcn7eXZ_.ayqm6NdjjhOADv {}
616abesecondfile.txt STANDARD 2018-10-05 15:09:47+00:00 WIaExRLmoksJzLhN7jU5YzoJxYSu6Ey6 {}
fb937cthirdfile.txt STANDARD_IA 2018-10-05 15:09:05+00:00 null {}

def delete_all_objects(bucket_name):
    res = []
    bucket=s3_resource.Bucket(bucket_name)
    for obj_version in bucket.object_versions.all():
        res.append({'Key': obj_version.object_key,
                    'VersionId': obj_version.id})
    print(res)
    bucket.delete_objects(Delete={'Objects': res})

>>> delete_all_objects(first_bucket_name)
[{'Key': '127367firstfile.txt', 'VersionId': 'eQgH6IC1VGcn7eXZ_.ayqm6NdjjhOADv'}, {'Key': '127367firstfile.txt', 'VersionId': 'UnQTaps14o3c1xdzh09Cyqg_hq4SjB53'}, {'Key': '127367firstfile.txt', 'VersionId': 'null'}, {'Key': '616abesecondfile.txt', 'VersionId': 'WIaExRLmoksJzLhN7jU5YzoJxYSu6Ey6'}, {'Key': '616abesecondfile.txt', 'VersionId': 'null'}, {'Key': 'fb937cthirdfile.txt', 'VersionId': 'null'}]

>>> s3_resource.Object(second_bucket_name, first_file_name).upload_file(
...     first_file_name)
>>> delete_all_objects(second_bucket_name)
[{'Key': '9c8b44firstfile.txt', 'VersionId': 'null'}]

s3_resource.Bucket(first_bucket_name).delete()

s3_resource.meta.client.delete_bucket(Bucket=second_bucket_name)