`airflow.providers.amazon.aws.hooks.s3`¶

Interact with AWS S3, using the boto3 library.

Module Contents¶

Classes¶

S3Hook

Interact with Amazon Simple Storage Service (S3).

Functions¶

`provide_bucket_name`(func)	Provide a bucket name taken from the connection if no bucket name has been passed to the function.
`provide_bucket_name_async`(func)	Provide a bucket name taken from the connection if no bucket name has been passed to the function.
`unify_bucket_name_and_key`(func)	Unify bucket name and key in case no bucket name and at least a key has been passed to the function.

Attributes¶

`T`
`logger`

airflow.providers.amazon.aws.hooks.s3.T[source]¶

airflow.providers.amazon.aws.hooks.s3.logger[source]¶

airflow.providers.amazon.aws.hooks.s3.provide_bucket_name(func)[source]¶

Provide a bucket name taken from the connection if no bucket name has been passed to the function.

airflow.providers.amazon.aws.hooks.s3.provide_bucket_name_async(func)[source]¶

Provide a bucket name taken from the connection if no bucket name has been passed to the function.

airflow.providers.amazon.aws.hooks.s3.unify_bucket_name_and_key(func)[source]¶

Unify bucket name and key in case no bucket name and at least a key has been passed to the function.

class airflow.providers.amazon.aws.hooks.s3.S3Hook(aws_conn_id=AwsBaseHook.default_conn_name, transfer_config_args=None, extra_args=None, *args, **kwargs)[source]¶

Bases: airflow.providers.amazon.aws.hooks.base_aws.AwsBaseHook

Interact with Amazon Simple Storage Service (S3).

Provide thick wrapper around boto3.client("s3") and boto3.resource("s3").

Parameters

transfer_config_args (dict | None) – Configuration object for managed S3 transfers.
extra_args (dict | None) – Extra arguments that may be passed to the download/upload operations.

For allowed upload extra arguments see boto3.s3.transfer.S3Transfer.ALLOWED_UPLOAD_ARGS.
For allowed download extra arguments see boto3.s3.transfer.S3Transfer.ALLOWED_DOWNLOAD_ARGS.

Additional arguments (such as aws_conn_id) may be specified and are passed down to the underlying AwsBaseHook.

See also

airflow.providers.amazon.aws.hooks.base_aws.AwsBaseHook

property extra_args[source]¶: Return hook’s extra arguments (immutable).

static parse_s3_url(s3url)[source]¶

Parses the S3 Url into a bucket name and key.

See https://docs.aws.amazon.com/AmazonS3/latest/userguide/access-bucket-intro.html for valid url formats.

Parameters: s3url (str) – The S3 Url to parse.
Returns: the parsed bucket name and key
Return type: tuple[str, str]

static get_s3_bucket_key(bucket, key, bucket_param_name, key_param_name)[source]¶

Get the S3 bucket name and key.

From either: - bucket name and key. Return the info as it is after checking key is a relative path. - key. Must be a full s3:// url.

Parameters

bucket (str | None) – The S3 bucket name
key (str) – The S3 key
bucket_param_name (str) – The parameter name containing the bucket name
key_param_name (str) – The parameter name containing the key name

Returns

the parsed bucket name and key

Return type

tuple[str, str]

check_for_bucket(bucket_name=None)[source]¶

Check if bucket_name exists.

See also

S3.Client.head_bucket()

Parameters: bucket_name (str | None) – the name of the bucket
Returns: True if it exists and False if not.
Return type: bool

get_bucket(bucket_name=None)[source]¶

Returns a S3.Bucket object.

See also

S3.ServiceResource.Bucket()

Parameters: bucket_name (str | None) – the name of the bucket
Returns: the bucket object to the bucket name.
Return type: mypy_boto3_s3.service_resource.Bucket

create_bucket(bucket_name=None, region_name=None)[source]¶

Creates an Amazon S3 bucket.

See also

S3.Client.create_bucket()

Parameters

bucket_name (str | None) – The name of the bucket
region_name (str | None) – The name of the aws region in which to create the bucket.

check_for_prefix(prefix, delimiter, bucket_name=None)[source]¶

Checks that a prefix exists in a bucket.

Parameters

bucket_name (str | None) – the name of the bucket
prefix (str) – a key prefix
delimiter (str) – the delimiter marks key hierarchy.

Returns

False if the prefix does not exist in the bucket and True if it does.

Return type

bool

list_prefixes(bucket_name=None, prefix=None, delimiter=None, page_size=None, max_items=None)[source]¶

Lists prefixes in a bucket under prefix.

See also

S3.Paginator.ListObjectsV2

Parameters

bucket_name (str | None) – the name of the bucket
prefix (str | None) – a key prefix
delimiter (str | None) – the delimiter marks key hierarchy.
page_size (int | None) – pagination size
max_items (int | None) – maximum items to return

Returns

a list of matched prefixes

Return type

list

async get_head_object_async(client, key, bucket_name=None)[source]¶

Retrieves metadata of an object.

Parameters

client (aiobotocore.client.AioBaseClient) – aiobotocore client
bucket_name (str | None) – Name of the bucket in which the file is stored
key (str) – S3 key that will point to the file

async list_prefixes_async(client, bucket_name=None, prefix=None, delimiter=None, page_size=None, max_items=None)[source]¶

Lists prefixes in a bucket under prefix.

Parameters

client (aiobotocore.client.AioBaseClient) – ClientCreatorContext
bucket_name (str | None) – the name of the bucket
prefix (str | None) – a key prefix
delimiter (str | None) – the delimiter marks key hierarchy.
page_size (int | None) – pagination size
max_items (int | None) – maximum items to return

Returns

a list of matched prefixes

Return type

list[Any]

async get_file_metadata_async(client, bucket_name, key)[source]¶

Gets a list of files that a key matching a wildcard expression exists in a bucket asynchronously.

Parameters

client (aiobotocore.client.AioBaseClient) – aiobotocore client
bucket_name (str) – the name of the bucket
key (str) – the path to the key

async check_key_async(client, bucket, bucket_keys, wildcard_match)[source]¶

Checks for all keys in bucket and returns boolean value.

Parameters

client (aiobotocore.client.AioBaseClient) – aiobotocore client
bucket (str) – the name of the bucket
bucket_keys (str | list[str]) – S3 keys that will point to the file
wildcard_match (bool) – the path to the key

async check_for_prefix_async(client, prefix, delimiter, bucket_name=None)[source]¶

Checks that a prefix exists in a bucket.

Parameters

bucket_name (str | None) – the name of the bucket
prefix (str) – a key prefix
delimiter (str) – the delimiter marks key hierarchy.

Returns

False if the prefix does not exist in the bucket and True if it does.

Return type

bool

async get_files_async(client, bucket, bucket_keys, wildcard_match, delimiter='/')[source]¶

Gets a list of files in the bucket.

async is_keys_unchanged_async(client, bucket_name, prefix, inactivity_period=60 * 60, min_objects=1, previous_objects=None, inactivity_seconds=0, allow_delete=True, last_activity_time=None)[source]¶

Check if new objects have been uploaded and the period has passed; update sensor state accordingly.

Parameters

client (aiobotocore.client.AioBaseClient) – aiobotocore client
bucket_name (str) – the name of the bucket
prefix (str) – a key prefix
inactivity_period (float) – the total seconds of inactivity to designate keys unchanged. Note, this mechanism is not real time and this operator may not return until a poke_interval after this period has passed with no additional objects sensed.
min_objects (int) – the minimum number of objects needed for keys unchanged sensor to be considered valid.
previous_objects (set[str] | None) – the set of object ids found during the last poke.
inactivity_seconds (int) – number of inactive seconds
allow_delete (bool) – Should this sensor consider objects being deleted between pokes valid behavior. If true a warning message will be logged when this happens. If false an error will be raised.
last_activity_time (datetime.datetime | None) – last activity datetime.

list_keys(bucket_name=None, prefix=None, delimiter=None, page_size=None, max_items=None, start_after_key=None, from_datetime=None, to_datetime=None, object_filter=None, apply_wildcard=False)[source]¶

Lists keys in a bucket under prefix and not containing delimiter.

See also

S3.Paginator.ListObjectsV2

Parameters

bucket_name (str | None) – the name of the bucket
prefix (str | None) – a key prefix
delimiter (str | None) – the delimiter marks key hierarchy.
page_size (int | None) – pagination size
max_items (int | None) – maximum items to return
start_after_key (str | None) – should return only keys greater than this key
from_datetime (datetime.datetime | None) – should return only keys with LastModified attr greater than this equal from_datetime
to_datetime (datetime.datetime | None) – should return only keys with LastModified attr less than this to_datetime
object_filter (Callable[Ellipsis, list] | None) – Function that receives the list of the S3 objects, from_datetime and to_datetime and returns the List of matched key.
apply_wildcard (bool) – whether to treat ‘*’ as a wildcard or a plain symbol in the prefix.

Example: Returns the list of S3 object with LastModified attr greater than from_datetime: and less than to_datetime:

def object_filter(
    keys: list,
    from_datetime: datetime | None = None,
    to_datetime: datetime | None = None,
) -> list:
    def _is_in_period(input_date: datetime) -> bool:
        if from_datetime is not None and input_date < from_datetime:
            return False

        if to_datetime is not None and input_date > to_datetime:
            return False
        return True

    return [k["Key"] for k in keys if _is_in_period(k["LastModified"])]

Returns: a list of matched keys
Return type: list

get_file_metadata(prefix, bucket_name=None, page_size=None, max_items=None)[source]¶

Lists metadata objects in a bucket under prefix.

See also

S3.Paginator.ListObjectsV2

Parameters

prefix (str) – a key prefix
bucket_name (str | None) – the name of the bucket
page_size (int | None) – pagination size
max_items (int | None) – maximum items to return

Returns

a list of metadata of objects

Return type

list

head_object(key, bucket_name=None)[source]¶

Retrieves metadata of an object.

See also

S3.Client.head_object()

Parameters

key (str) – S3 key that will point to the file
bucket_name (str | None) – Name of the bucket in which the file is stored

Returns

metadata of an object

Return type

dict | None

check_for_key(key, bucket_name=None)[source]¶

Checks if a key exists in a bucket.

See also

S3.Client.head_object()

Parameters

key (str) – S3 key that will point to the file
bucket_name (str | None) – Name of the bucket in which the file is stored

Returns

True if the key exists and False if not.

Return type

bool

get_key(key, bucket_name=None)[source]¶

Returns a S3.Object.

See also

S3.ServiceResource.Object()

Parameters

key (str) – the path to the key
bucket_name (str | None) – the name of the bucket

Returns

the key object from the bucket

Return type

mypy_boto3_s3.service_resource.Object

read_key(key, bucket_name=None)[source]¶

Reads a key from S3.

See also

S3.Object.get()

Parameters

key (str) – S3 key that will point to the file
bucket_name (str | None) – Name of the bucket in which the file is stored

Returns

the content of the key

Return type

str

select_key(key, bucket_name=None, expression=None, expression_type=None, input_serialization=None, output_serialization=None)[source]¶

Reads a key with S3 Select.

See also

S3.Client.select_object_content()

Parameters

key (str) – S3 key that will point to the file
bucket_name (str | None) – Name of the bucket in which the file is stored
expression (str | None) – S3 Select expression
expression_type (str | None) – S3 Select expression type
input_serialization (dict[str, Any] | None) – S3 Select input data serialization format
output_serialization (dict[str, Any] | None) – S3 Select output data serialization format

Returns

retrieved subset of original data by S3 Select

Return type

str

check_for_wildcard_key(wildcard_key, bucket_name=None, delimiter='')[source]¶

Checks that a key matching a wildcard expression exists in a bucket.

Parameters

wildcard_key (str) – the path to the key
bucket_name (str | None) – the name of the bucket
delimiter (str) – the delimiter marks key hierarchy

Returns

True if a key exists and False if not.

Return type

bool

get_wildcard_key(wildcard_key, bucket_name=None, delimiter='')[source]¶

Returns a boto3.s3.Object object matching the wildcard expression.

Parameters

wildcard_key (str) – the path to the key
bucket_name (str | None) – the name of the bucket
delimiter (str) – the delimiter marks key hierarchy

Returns

the key object from the bucket or None if none has been found.

Return type

mypy_boto3_s3.service_resource.Object | None

load_file(filename, key, bucket_name=None, replace=False, encrypt=False, gzip=False, acl_policy=None)[source]¶

Loads a local file to S3.

See also

S3.Client.upload_file()

Parameters

filename (pathlib.Path | str) – path to the file to load.
key (str) – S3 key that will point to the file
bucket_name (str | None) – Name of the bucket in which to store the file
replace (bool) – A flag to decide whether or not to overwrite the key if it already exists. If replace is False and the key exists, an error will be raised.
encrypt (bool) – If True, the file will be encrypted on the server-side by S3 and will be stored in an encrypted form while at rest in S3.
gzip (bool) – If True, the file will be compressed locally
acl_policy (str | None) – String specifying the canned ACL policy for the file being uploaded to the S3 bucket.

load_string(string_data, key, bucket_name=None, replace=False, encrypt=False, encoding=None, acl_policy=None, compression=None)[source]¶

Loads a string to S3.

This is provided as a convenience to drop a string in S3. It uses the boto infrastructure to ship a file to s3.

See also

S3.Client.upload_fileobj()

Parameters

string_data (str) – str to set as content for the key.
key (str) – S3 key that will point to the file
bucket_name (str | None) – Name of the bucket in which to store the file
replace (bool) – A flag to decide whether or not to overwrite the key if it already exists
encrypt (bool) – If True, the file will be encrypted on the server-side by S3 and will be stored in an encrypted form while at rest in S3.
encoding (str | None) – The string to byte encoding
acl_policy (str | None) – The string to specify the canned ACL policy for the object to be uploaded
compression (str | None) – Type of compression to use, currently only gzip is supported.

load_bytes(bytes_data, key, bucket_name=None, replace=False, encrypt=False, acl_policy=None)[source]¶

Loads bytes to S3.

This is provided as a convenience to drop bytes data into S3. It uses the boto infrastructure to ship a file to s3.

See also

S3.Client.upload_fileobj()

Parameters

bytes_data (bytes) – bytes to set as content for the key.
key (str) – S3 key that will point to the file
bucket_name (str | None) – Name of the bucket in which to store the file
replace (bool) – A flag to decide whether or not to overwrite the key if it already exists
encrypt (bool) – If True, the file will be encrypted on the server-side by S3 and will be stored in an encrypted form while at rest in S3.
acl_policy (str | None) – The string to specify the canned ACL policy for the object to be uploaded

load_file_obj(file_obj, key, bucket_name=None, replace=False, encrypt=False, acl_policy=None)[source]¶

Loads a file object to S3.

See also

S3.Client.upload_fileobj()

Parameters

file_obj (io.BytesIO) – The file-like object to set as the content for the S3 key.
key (str) – S3 key that will point to the file
bucket_name (str | None) – Name of the bucket in which to store the file
replace (bool) – A flag that indicates whether to overwrite the key if it already exists.
encrypt (bool) – If True, S3 encrypts the file on the server, and the file is stored in encrypted form at rest in S3.
acl_policy (str | None) – The string to specify the canned ACL policy for the object to be uploaded

copy_object(source_bucket_key, dest_bucket_key, source_bucket_name=None, dest_bucket_name=None, source_version_id=None, acl_policy=None)[source]¶

Creates a copy of an object that is already stored in S3.

See also

S3.Client.copy_object()

Note: the S3 connection used here needs to have access to both source and destination bucket/key.

Parameters

source_bucket_key (str) –
The key of the source object.

It can be either full s3:// style url or relative path from root level.

When it’s specified as a full s3:// url, please omit source_bucket_name.
dest_bucket_key (str) –
The key of the object to copy to.

The convention to specify dest_bucket_key is the same as source_bucket_key.
source_bucket_name (str | None) –
Name of the S3 bucket where the source object is in.

It should be omitted when source_bucket_key is provided as a full s3:// url.
dest_bucket_name (str | None) –
Name of the S3 bucket to where the object is copied.

It should be omitted when dest_bucket_key is provided as a full s3:// url.
source_version_id (str | None) – Version ID of the source object (OPTIONAL)
acl_policy (str | None) – The string to specify the canned ACL policy for the object to be copied which is private by default.

delete_bucket(bucket_name, force_delete=False, max_retries=5)[source]¶

To delete s3 bucket, delete all s3 bucket objects and then delete the bucket.

See also

S3.Client.delete_bucket()

Parameters

bucket_name (str) – Bucket name
force_delete (bool) – Enable this to delete bucket even if not empty
max_retries (int) – A bucket must be empty to be deleted. If force_delete is true, then retries may help prevent a race condition between deleting objects in the bucket and trying to delete the bucket.

Returns

None

Return type

None

delete_objects(bucket, keys)[source]¶

Delete keys from the bucket.

See also

S3.Client.delete_objects()

Parameters

bucket (str) – Name of the bucket in which you are going to delete object(s)
keys (str | list) –
The key(s) to delete from S3 bucket.

When keys is a string, it’s supposed to be the key name of the single object to delete.

When keys is a list, it’s supposed to be the list of the keys to delete.

download_file(key, bucket_name=None, local_path=None, preserve_file_name=False, use_autogenerated_subdir=True)[source]¶

Downloads a file from the S3 location to the local file system.

See also

S3.Object.download_fileobj()

Parameters

key (str) – The key path in S3.
bucket_name (str | None) – The specific bucket to use.
local_path (str | None) – The local path to the downloaded file. If no path is provided it will use the system’s temporary directory.
preserve_file_name (bool) – If you want the downloaded file name to be the same name as it is in S3, set this parameter to True. When set to False, a random filename will be generated. Default: False.
use_autogenerated_subdir (bool) – Pairs with ‘preserve_file_name = True’ to download the file into a random generated folder inside the ‘local_path’, useful to avoid collisions between various tasks that might download the same file name. Set it to ‘False’ if you don’t want it, and you want a predictable path. Default: True.

Returns

the file name.

Return type

str

generate_presigned_url(client_method, params=None, expires_in=3600, http_method=None)[source]¶

Generate a presigned url given a client, its method, and arguments.

See also

S3.Client.generate_presigned_url()

Parameters

client_method (str) – The client method to presign for.
params (dict | None) – The parameters normally passed to ClientMethod.
expires_in (int) – The number of seconds the presigned url is valid for. By default it expires in an hour (3600 seconds).
http_method (str | None) – The http method to use on the generated url. By default, the http method is whatever is used in the method’s model.

Returns

The presigned url.

Return type

str | None

get_bucket_tagging(bucket_name=None)[source]¶

Gets a List of tags from a bucket.

See also

S3.Client.get_bucket_tagging()

Parameters: bucket_name (str | None) – The name of the bucket.
Returns: A List containing the key/value pairs for the tags
Return type: list[dict[str, str]] | None

put_bucket_tagging(tag_set=None, key=None, value=None, bucket_name=None)[source]¶

Overwrites the existing TagSet with provided tags; must provide a TagSet, a key/value pair, or both.

See also

S3.Client.put_bucket_tagging()

Parameters

tag_set (dict[str, str] | list[dict[str, str]] | None) – A dictionary containing the key/value pairs for the tags, or a list already formatted for the API
key (str | None) – The Key for the new TagSet entry.
value (str | None) – The Value for the new TagSet entry.
bucket_name (str | None) – The name of the bucket.

Returns

None

Return type

None

delete_bucket_tagging(bucket_name=None)[source]¶

Deletes all tags from a bucket.

See also

S3.Client.delete_bucket_tagging()

Parameters: bucket_name (str | None) – The name of the bucket.
Returns: None
Return type: None

airflow.providers.amazon.aws.hooks.s3¶

Module Contents¶

Classes¶

Functions¶

Attributes¶

`airflow.providers.amazon.aws.hooks.s3`¶