`prefect.filesystems`

Classes

`ReadableFileSystem`

Methods:

`aload`

aload(cls, name: str, validate: bool = True, client: Optional['PrefectClient'] = None) -> 'Self'

Retrieves data from the block document with the given name for the block type that corresponds with the current class and returns an instantiated version of the current class with the data stored in the block document. If a block document for a given block type is saved with a different schema than the current class calling aload, a warning will be raised. If the current class schema is a subset of the block document schema, the block can be loaded as normal using the default validate = True. If the current class schema is a superset of the block document schema, aload must be called with validate set to False to prevent a validation error. In this case, the block attributes will default to None and must be set manually and saved to a new block document before the block can be used as expected. Args:

name: The name or slug of the block document. A block document slug is a string with the format <block_type_slug>/<block_document_name>
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

Examples: Load from a Block subclass with a block document name:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = await Custom.aload("my-custom-message")

Load from Block with a block document slug:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = await Block.aload("custom/my-custom-message")

Migrate a block document to a new schema:

# original class
class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

# Updated class with new required field
class Custom(Block):
    message: str
    number_of_ducks: int

loaded_block = await Custom.aload("my-custom-message", validate=False)

# Prints UserWarning about schema mismatch

loaded_block.number_of_ducks = 42

loaded_block.save("my-custom-message", overwrite=True)

`annotation_refers_to_block_class`

annotation_refers_to_block_class(annotation: Any) -> bool

`block_initialization`

block_initialization(self) -> None

`delete`

delete(cls, name: str, client: Optional['PrefectClient'] = None)

`get_block_capabilities`

get_block_capabilities(cls) -> FrozenSet[str]

Returns the block capabilities for this Block. Recursively collects all block capabilities of all parent classes into a single frozenset.

`get_block_class_from_key`

get_block_class_from_key(cls: type[Self], key: str) -> type[Self]

Retrieve the block class implementation given a key.

`get_block_class_from_schema`

get_block_class_from_schema(cls: type[Self], schema: BlockSchema) -> type[Self]

Retrieve the block class implementation given a schema.

`get_block_placeholder`

get_block_placeholder(self) -> str

Returns the block placeholder for the current block which can be used for templating. Returns:

The block placeholder for the current block in the format prefect.blocks.{block_type_name}.{block_document_name}

Raises:

BlockNotSavedError: Raised if the block has not been saved.

If a block has not been saved, the return value will be None.

`get_block_schema_version`

get_block_schema_version(cls) -> str

`get_block_type_name`

get_block_type_name(cls) -> str

`get_block_type_slug`

get_block_type_slug(cls) -> str

`get_code_example`

get_code_example(cls) -> Optional[str]

Returns the code example for the given block. Attempts to parse code example from the class docstring if an override is not provided.

`get_description`

get_description(cls) -> Optional[str]

Returns the description for the current block. Attempts to parse description from class docstring if an override is not defined.

`is_block_class`

is_block_class(block: Any) -> TypeGuard[type['Block']]

`load`

load(cls, name: str, validate: bool = True, client: Optional['PrefectClient'] = None) -> 'Self'

Retrieves data from the block document with the given name for the block type that corresponds with the current class and returns an instantiated version of the current class with the data stored in the block document. If a block document for a given block type is saved with a different schema than the current class calling load, a warning will be raised. If the current class schema is a subset of the block document schema, the block can be loaded as normal using the default validate = True. If the current class schema is a superset of the block document schema, load must be called with validate set to False to prevent a validation error. In this case, the block attributes will default to None and must be set manually and saved to a new block document before the block can be used as expected. Args:

name: The name or slug of the block document. A block document slug is a string with the format <block_type_slug>/<block_document_name>
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

Examples: Load from a Block subclass with a block document name:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = Custom.load("my-custom-message")

Load from Block with a block document slug:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = Block.load("custom/my-custom-message")

Migrate a block document to a new schema:

# original class
class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

# Updated class with new required field
class Custom(Block):
    message: str
    number_of_ducks: int

loaded_block = Custom.load("my-custom-message", validate=False)

# Prints UserWarning about schema mismatch

loaded_block.number_of_ducks = 42

loaded_block.save("my-custom-message", overwrite=True)

`load_from_ref`

load_from_ref(cls, ref: Union[str, UUID, dict[str, Any]], validate: bool = True, client: 'PrefectClient | None' = None) -> Self

Retrieves data from the block document by given reference for the block type that corresponds with the current class and returns an instantiated version of the current class with the data stored in the block document. Provided reference can be a block document ID, or a reference data in dictionary format. Supported dictionary reference formats are:

{"block_document_id": <block_document_id>}
{"block_document_slug": <block_document_slug>}

If a block document for a given block type is saved with a different schema than the current class calling load, a warning will be raised. If the current class schema is a subset of the block document schema, the block can be loaded as normal using the default validate = True. If the current class schema is a superset of the block document schema, load must be called with validate set to False to prevent a validation error. In this case, the block attributes will default to None and must be set manually and saved to a new block document before the block can be used as expected. Args:

ref: The reference to the block document. This can be a block document ID, or one of supported dictionary reference formats.
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If invalid reference format is provided.
ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

`model_dump`

model_dump(self) -> dict[str, Any]

`model_json_schema`

model_json_schema(cls, by_alias: bool = True, ref_template: str = '#/definitions/{model}', schema_generator: type[GenerateJsonSchema] = GenerateJsonSchema, mode: Literal['validation', 'serialization'] = 'validation') -> dict[str, Any]

TODO: stop overriding this method - use GenerateSchema in ConfigDict instead?

`model_validate`

model_validate(cls: type[Self], obj: dict[str, Any] | Any) -> Self

`read_path`

read_path(self, path: str) -> bytes

`register_type_and_schema`

register_type_and_schema(cls, client: Optional['PrefectClient'] = None)

Makes block available for configuration with current Prefect API. Recursively registers all nested blocks. Registration is idempotent. Args:

client: Optional client to use for registering type and schema with the Prefect API. A new client will be created and used if one is not provided.

`save`

save(self, name: Optional[str] = None, overwrite: bool = False, client: Optional['PrefectClient'] = None)

Saves the values of a block as a block document. Args:

name: User specified name to give saved block document which can later be used to load the block document.
overwrite: Boolean value specifying if values should be overwritten if a block document with the specified name already exists.

`ser_model`

ser_model(self, handler: SerializerFunctionWrapHandler, info: SerializationInfo) -> Any

`validate_block_type_slug`

validate_block_type_slug(cls, values: Any) -> Any

Validates that the block_type_slug in the input values matches the expected block type slug for the class. This helps pydantic to correctly discriminate between different Block subclasses when validating Union types of Blocks.

`WritableFileSystem`

Methods:

`aload`

aload(cls, name: str, validate: bool = True, client: Optional['PrefectClient'] = None) -> 'Self'

name: The name or slug of the block document. A block document slug is a string with the format <block_type_slug>/<block_document_name>
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

Examples: Load from a Block subclass with a block document name:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = await Custom.aload("my-custom-message")

Load from Block with a block document slug:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = await Block.aload("custom/my-custom-message")

Migrate a block document to a new schema:

# original class
class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

# Updated class with new required field
class Custom(Block):
    message: str
    number_of_ducks: int

loaded_block = await Custom.aload("my-custom-message", validate=False)

# Prints UserWarning about schema mismatch

loaded_block.number_of_ducks = 42

loaded_block.save("my-custom-message", overwrite=True)

`annotation_refers_to_block_class`

annotation_refers_to_block_class(annotation: Any) -> bool

`block_initialization`

block_initialization(self) -> None

`delete`

delete(cls, name: str, client: Optional['PrefectClient'] = None)

`get_block_capabilities`

get_block_capabilities(cls) -> FrozenSet[str]

Returns the block capabilities for this Block. Recursively collects all block capabilities of all parent classes into a single frozenset.

`get_block_class_from_key`

get_block_class_from_key(cls: type[Self], key: str) -> type[Self]

Retrieve the block class implementation given a key.

`get_block_class_from_schema`

get_block_class_from_schema(cls: type[Self], schema: BlockSchema) -> type[Self]

Retrieve the block class implementation given a schema.

`get_block_placeholder`

get_block_placeholder(self) -> str

Returns the block placeholder for the current block which can be used for templating. Returns:

The block placeholder for the current block in the format prefect.blocks.{block_type_name}.{block_document_name}

Raises:

BlockNotSavedError: Raised if the block has not been saved.

If a block has not been saved, the return value will be None.

`get_block_schema_version`

get_block_schema_version(cls) -> str

`get_block_type_name`

get_block_type_name(cls) -> str

`get_block_type_slug`

get_block_type_slug(cls) -> str

`get_code_example`

get_code_example(cls) -> Optional[str]

Returns the code example for the given block. Attempts to parse code example from the class docstring if an override is not provided.

`get_description`

get_description(cls) -> Optional[str]

Returns the description for the current block. Attempts to parse description from class docstring if an override is not defined.

`is_block_class`

is_block_class(block: Any) -> TypeGuard[type['Block']]

`load`

load(cls, name: str, validate: bool = True, client: Optional['PrefectClient'] = None) -> 'Self'

Retrieves data from the block document with the given name for the block type that corresponds with the current class and returns an instantiated version of the current class with the data stored in the block document. If a block document for a given block type is saved with a different schema than the current class calling load, a warning will be raised. If the current class schema is a subset of the block document schema, the block can be loaded as normal using the default validate = True. If the current class schema is a superset of the block document schema, load must be called with validate set to False to prevent a validation error. In this case, the block attributes will default to None and must be set manually and saved to a new block document before the block can be used as expected. Args:

name: The name or slug of the block document. A block document slug is a string with the format <block_type_slug>/<block_document_name>
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

Examples: Load from a Block subclass with a block document name:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = Custom.load("my-custom-message")

Load from Block with a block document slug:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = Block.load("custom/my-custom-message")

Migrate a block document to a new schema:

# original class
class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

# Updated class with new required field
class Custom(Block):
    message: str
    number_of_ducks: int

loaded_block = Custom.load("my-custom-message", validate=False)

# Prints UserWarning about schema mismatch

loaded_block.number_of_ducks = 42

loaded_block.save("my-custom-message", overwrite=True)

`load_from_ref`

load_from_ref(cls, ref: Union[str, UUID, dict[str, Any]], validate: bool = True, client: 'PrefectClient | None' = None) -> Self

{"block_document_id": <block_document_id>}
{"block_document_slug": <block_document_slug>}

ref: The reference to the block document. This can be a block document ID, or one of supported dictionary reference formats.
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If invalid reference format is provided.
ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

`model_dump`

model_dump(self) -> dict[str, Any]

`model_json_schema`

model_json_schema(cls, by_alias: bool = True, ref_template: str = '#/definitions/{model}', schema_generator: type[GenerateJsonSchema] = GenerateJsonSchema, mode: Literal['validation', 'serialization'] = 'validation') -> dict[str, Any]

TODO: stop overriding this method - use GenerateSchema in ConfigDict instead?

`model_validate`

model_validate(cls: type[Self], obj: dict[str, Any] | Any) -> Self

`read_path`

read_path(self, path: str) -> bytes

`register_type_and_schema`

register_type_and_schema(cls, client: Optional['PrefectClient'] = None)

Makes block available for configuration with current Prefect API. Recursively registers all nested blocks. Registration is idempotent. Args:

client: Optional client to use for registering type and schema with the Prefect API. A new client will be created and used if one is not provided.

`save`

save(self, name: Optional[str] = None, overwrite: bool = False, client: Optional['PrefectClient'] = None)

Saves the values of a block as a block document. Args:

name: User specified name to give saved block document which can later be used to load the block document.
overwrite: Boolean value specifying if values should be overwritten if a block document with the specified name already exists.

`ser_model`

ser_model(self, handler: SerializerFunctionWrapHandler, info: SerializationInfo) -> Any

`validate_block_type_slug`

validate_block_type_slug(cls, values: Any) -> Any

`write_path`

write_path(self, path: str, content: bytes) -> None

`ReadableDeploymentStorage`

Methods:

`aload`

aload(cls, name: str, validate: bool = True, client: Optional['PrefectClient'] = None) -> 'Self'

name: The name or slug of the block document. A block document slug is a string with the format <block_type_slug>/<block_document_name>
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

Examples: Load from a Block subclass with a block document name:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = await Custom.aload("my-custom-message")

Load from Block with a block document slug:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = await Block.aload("custom/my-custom-message")

Migrate a block document to a new schema:

# original class
class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

# Updated class with new required field
class Custom(Block):
    message: str
    number_of_ducks: int

loaded_block = await Custom.aload("my-custom-message", validate=False)

# Prints UserWarning about schema mismatch

loaded_block.number_of_ducks = 42

loaded_block.save("my-custom-message", overwrite=True)

`annotation_refers_to_block_class`

annotation_refers_to_block_class(annotation: Any) -> bool

`block_initialization`

block_initialization(self) -> None

`delete`

delete(cls, name: str, client: Optional['PrefectClient'] = None)

`get_block_capabilities`

get_block_capabilities(cls) -> FrozenSet[str]

Returns the block capabilities for this Block. Recursively collects all block capabilities of all parent classes into a single frozenset.

`get_block_class_from_key`

get_block_class_from_key(cls: type[Self], key: str) -> type[Self]

Retrieve the block class implementation given a key.

`get_block_class_from_schema`

get_block_class_from_schema(cls: type[Self], schema: BlockSchema) -> type[Self]

Retrieve the block class implementation given a schema.

`get_block_placeholder`

get_block_placeholder(self) -> str

Returns the block placeholder for the current block which can be used for templating. Returns:

The block placeholder for the current block in the format prefect.blocks.{block_type_name}.{block_document_name}

Raises:

BlockNotSavedError: Raised if the block has not been saved.

If a block has not been saved, the return value will be None.

`get_block_schema_version`

get_block_schema_version(cls) -> str

`get_block_type_name`

get_block_type_name(cls) -> str

`get_block_type_slug`

get_block_type_slug(cls) -> str

`get_code_example`

get_code_example(cls) -> Optional[str]

Returns the code example for the given block. Attempts to parse code example from the class docstring if an override is not provided.

`get_description`

get_description(cls) -> Optional[str]

Returns the description for the current block. Attempts to parse description from class docstring if an override is not defined.

`get_directory`

get_directory(self, from_path: Optional[str] = None, local_path: Optional[str] = None) -> None

`is_block_class`

is_block_class(block: Any) -> TypeGuard[type['Block']]

`load`

load(cls, name: str, validate: bool = True, client: Optional['PrefectClient'] = None) -> 'Self'

Retrieves data from the block document with the given name for the block type that corresponds with the current class and returns an instantiated version of the current class with the data stored in the block document. If a block document for a given block type is saved with a different schema than the current class calling load, a warning will be raised. If the current class schema is a subset of the block document schema, the block can be loaded as normal using the default validate = True. If the current class schema is a superset of the block document schema, load must be called with validate set to False to prevent a validation error. In this case, the block attributes will default to None and must be set manually and saved to a new block document before the block can be used as expected. Args:

name: The name or slug of the block document. A block document slug is a string with the format <block_type_slug>/<block_document_name>
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

Examples: Load from a Block subclass with a block document name:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = Custom.load("my-custom-message")

Load from Block with a block document slug:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = Block.load("custom/my-custom-message")

Migrate a block document to a new schema:

# original class
class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

# Updated class with new required field
class Custom(Block):
    message: str
    number_of_ducks: int

loaded_block = Custom.load("my-custom-message", validate=False)

# Prints UserWarning about schema mismatch

loaded_block.number_of_ducks = 42

loaded_block.save("my-custom-message", overwrite=True)

`load_from_ref`

load_from_ref(cls, ref: Union[str, UUID, dict[str, Any]], validate: bool = True, client: 'PrefectClient | None' = None) -> Self

{"block_document_id": <block_document_id>}
{"block_document_slug": <block_document_slug>}

ref: The reference to the block document. This can be a block document ID, or one of supported dictionary reference formats.
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If invalid reference format is provided.
ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

`model_dump`

model_dump(self) -> dict[str, Any]

`model_json_schema`

model_json_schema(cls, by_alias: bool = True, ref_template: str = '#/definitions/{model}', schema_generator: type[GenerateJsonSchema] = GenerateJsonSchema, mode: Literal['validation', 'serialization'] = 'validation') -> dict[str, Any]

TODO: stop overriding this method - use GenerateSchema in ConfigDict instead?

`model_validate`

model_validate(cls: type[Self], obj: dict[str, Any] | Any) -> Self

`register_type_and_schema`

register_type_and_schema(cls, client: Optional['PrefectClient'] = None)

Makes block available for configuration with current Prefect API. Recursively registers all nested blocks. Registration is idempotent. Args:

client: Optional client to use for registering type and schema with the Prefect API. A new client will be created and used if one is not provided.

`save`

save(self, name: Optional[str] = None, overwrite: bool = False, client: Optional['PrefectClient'] = None)

Saves the values of a block as a block document. Args:

name: User specified name to give saved block document which can later be used to load the block document.
overwrite: Boolean value specifying if values should be overwritten if a block document with the specified name already exists.

`ser_model`

ser_model(self, handler: SerializerFunctionWrapHandler, info: SerializationInfo) -> Any

`validate_block_type_slug`

validate_block_type_slug(cls, values: Any) -> Any

`WritableDeploymentStorage`

Methods:

`aload`

aload(cls, name: str, validate: bool = True, client: Optional['PrefectClient'] = None) -> 'Self'

name: The name or slug of the block document. A block document slug is a string with the format <block_type_slug>/<block_document_name>
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

Examples: Load from a Block subclass with a block document name:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = await Custom.aload("my-custom-message")

Load from Block with a block document slug:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = await Block.aload("custom/my-custom-message")

Migrate a block document to a new schema:

# original class
class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

# Updated class with new required field
class Custom(Block):
    message: str
    number_of_ducks: int

loaded_block = await Custom.aload("my-custom-message", validate=False)

# Prints UserWarning about schema mismatch

loaded_block.number_of_ducks = 42

loaded_block.save("my-custom-message", overwrite=True)

`annotation_refers_to_block_class`

annotation_refers_to_block_class(annotation: Any) -> bool

`block_initialization`

block_initialization(self) -> None

`delete`

delete(cls, name: str, client: Optional['PrefectClient'] = None)

`get_block_capabilities`

get_block_capabilities(cls) -> FrozenSet[str]

Returns the block capabilities for this Block. Recursively collects all block capabilities of all parent classes into a single frozenset.

`get_block_class_from_key`

get_block_class_from_key(cls: type[Self], key: str) -> type[Self]

Retrieve the block class implementation given a key.

`get_block_class_from_schema`

get_block_class_from_schema(cls: type[Self], schema: BlockSchema) -> type[Self]

Retrieve the block class implementation given a schema.

`get_block_placeholder`

get_block_placeholder(self) -> str

Returns the block placeholder for the current block which can be used for templating. Returns:

The block placeholder for the current block in the format prefect.blocks.{block_type_name}.{block_document_name}

Raises:

BlockNotSavedError: Raised if the block has not been saved.

If a block has not been saved, the return value will be None.

`get_block_schema_version`

get_block_schema_version(cls) -> str

`get_block_type_name`

get_block_type_name(cls) -> str

`get_block_type_slug`

get_block_type_slug(cls) -> str

`get_code_example`

get_code_example(cls) -> Optional[str]

Returns the code example for the given block. Attempts to parse code example from the class docstring if an override is not provided.

`get_description`

get_description(cls) -> Optional[str]

Returns the description for the current block. Attempts to parse description from class docstring if an override is not defined.

`get_directory`

get_directory(self, from_path: Optional[str] = None, local_path: Optional[str] = None) -> None

`is_block_class`

is_block_class(block: Any) -> TypeGuard[type['Block']]

`load`

load(cls, name: str, validate: bool = True, client: Optional['PrefectClient'] = None) -> 'Self'

Retrieves data from the block document with the given name for the block type that corresponds with the current class and returns an instantiated version of the current class with the data stored in the block document. If a block document for a given block type is saved with a different schema than the current class calling load, a warning will be raised. If the current class schema is a subset of the block document schema, the block can be loaded as normal using the default validate = True. If the current class schema is a superset of the block document schema, load must be called with validate set to False to prevent a validation error. In this case, the block attributes will default to None and must be set manually and saved to a new block document before the block can be used as expected. Args:

name: The name or slug of the block document. A block document slug is a string with the format <block_type_slug>/<block_document_name>
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

Examples: Load from a Block subclass with a block document name:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = Custom.load("my-custom-message")

Load from Block with a block document slug:

class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

loaded_block = Block.load("custom/my-custom-message")

Migrate a block document to a new schema:

# original class
class Custom(Block):
    message: str

Custom(message="Hello!").save("my-custom-message")

# Updated class with new required field
class Custom(Block):
    message: str
    number_of_ducks: int

loaded_block = Custom.load("my-custom-message", validate=False)

# Prints UserWarning about schema mismatch

loaded_block.number_of_ducks = 42

loaded_block.save("my-custom-message", overwrite=True)

`load_from_ref`

load_from_ref(cls, ref: Union[str, UUID, dict[str, Any]], validate: bool = True, client: 'PrefectClient | None' = None) -> Self

{"block_document_id": <block_document_id>}
{"block_document_slug": <block_document_slug>}

ref: The reference to the block document. This can be a block document ID, or one of supported dictionary reference formats.
validate: If False, the block document will be loaded without Pydantic validating the block schema. This is useful if the block schema has changed client-side since the block document referred to by name was saved.
client: The client to use to load the block document. If not provided, the default client will be injected.

Raises:

ValueError: If invalid reference format is provided.
ValueError: If the requested block document is not found.

Returns:

An instance of the current class hydrated with the data stored in the
block document with the specified name.

`model_dump`

model_dump(self) -> dict[str, Any]

`model_json_schema`

model_json_schema(cls, by_alias: bool = True, ref_template: str = '#/definitions/{model}', schema_generator: type[GenerateJsonSchema] = GenerateJsonSchema, mode: Literal['validation', 'serialization'] = 'validation') -> dict[str, Any]

TODO: stop overriding this method - use GenerateSchema in ConfigDict instead?

`model_validate`

model_validate(cls: type[Self], obj: dict[str, Any] | Any) -> Self

`put_directory`

put_directory(self, local_path: Optional[str] = None, to_path: Optional[str] = None, ignore_file: Optional[str] = None) -> None

`register_type_and_schema`

register_type_and_schema(cls, client: Optional['PrefectClient'] = None)

Makes block available for configuration with current Prefect API. Recursively registers all nested blocks. Registration is idempotent. Args:

client: Optional client to use for registering type and schema with the Prefect API. A new client will be created and used if one is not provided.

`save`

save(self, name: Optional[str] = None, overwrite: bool = False, client: Optional['PrefectClient'] = None)

Saves the values of a block as a block document. Args:

name: User specified name to give saved block document which can later be used to load the block document.
overwrite: Boolean value specifying if values should be overwritten if a block document with the specified name already exists.

`ser_model`

ser_model(self, handler: SerializerFunctionWrapHandler, info: SerializationInfo) -> Any

`validate_block_type_slug`

validate_block_type_slug(cls, values: Any) -> Any

`LocalFileSystem`

Store data as a file on a local file system. Methods:

`aget_directory`

aget_directory(self, from_path: Optional[str] = None, local_path: Optional[str] = None) -> None

Copies a directory from one place to another on the local filesystem. Defaults to copying the entire contents of the block’s basepath to the current working directory.

`aput_directory`

aput_directory(self, local_path: Optional[str] = None, to_path: Optional[str] = None, ignore_file: Optional[str] = None) -> None

Copies a directory from one place to another on the local filesystem. Defaults to copying the entire contents of the current working directory to the block’s basepath. An ignore_file path may be provided that can include gitignore style expressions for filepaths to ignore.

`aread_path`

aread_path(self, path: str) -> bytes

`awrite_path`

awrite_path(self, path: str, content: bytes) -> str

`cast_pathlib`

cast_pathlib(cls, value: str | Path | None) -> str | None

`get_directory`

get_directory(self, from_path: Optional[str] = None, local_path: Optional[str] = None) -> None

Copies a directory from one place to another on the local filesystem. Defaults to copying the entire contents of the block’s basepath to the current working directory.

`get_directory`

get_directory(self, from_path: Optional[str] = None, local_path: Optional[str] = None) -> None

`put_directory`

put_directory(self, local_path: Optional[str] = None, to_path: Optional[str] = None, ignore_file: Optional[str] = None) -> None

`put_directory`

put_directory(self, local_path: Optional[str] = None, to_path: Optional[str] = None, ignore_file: Optional[str] = None) -> None

`read_path`

read_path(self, path: str) -> bytes

`read_path`

read_path(self, path: str) -> bytes

`write_path`

write_path(self, path: str, content: bytes) -> str

`write_path`

write_path(self, path: str, content: bytes) -> None

`RemoteFileSystem`

Store data as a file on a remote file system. Supports any remote file system supported by fsspec. The file system is specified using a protocol. For example, “s3://my-bucket/my-folder/” will use S3. Methods:

`check_basepath`

check_basepath(cls, value: str) -> str

`filesystem`

filesystem(self) -> fsspec.AbstractFileSystem

`get_directory`

get_directory(self, from_path: Optional[str] = None, local_path: Optional[str] = None) -> None

Downloads a directory from a given remote path to a local directory. Defaults to downloading the entire contents of the block’s basepath to the current working directory.

`get_directory`

get_directory(self, from_path: Optional[str] = None, local_path: Optional[str] = None) -> None

`put_directory`

put_directory(self, local_path: Optional[str] = None, to_path: Optional[str] = None, ignore_file: Optional[str] = None, overwrite: bool = True) -> int

Uploads a directory from a given local path to a remote directory. Defaults to uploading the entire contents of the current working directory to the block’s basepath.

`put_directory`

put_directory(self, local_path: Optional[str] = None, to_path: Optional[str] = None, ignore_file: Optional[str] = None) -> None

`read_path`

read_path(self, path: str) -> bytes

`read_path`

read_path(self, path: str) -> bytes

`write_path`

write_path(self, path: str, content: bytes) -> str

`write_path`

write_path(self, path: str, content: bytes) -> None

`SMB`

Store data as a file on a SMB share. Methods:

`basepath`

basepath(self) -> str

`filesystem`

filesystem(self) -> RemoteFileSystem

`get_directory`

get_directory(self, from_path: Optional[str] = None, local_path: Optional[str] = None) -> bytes

Downloads a directory from a given remote path to a local directory. Defaults to downloading the entire contents of the block’s basepath to the current working directory.

`get_directory`

get_directory(self, from_path: Optional[str] = None, local_path: Optional[str] = None) -> None

`put_directory`

put_directory(self, local_path: Optional[str] = None, to_path: Optional[str] = None, ignore_file: Optional[str] = None) -> int

Uploads a directory from a given local path to a remote directory. Defaults to uploading the entire contents of the current working directory to the block’s basepath.

`put_directory`

put_directory(self, local_path: Optional[str] = None, to_path: Optional[str] = None, ignore_file: Optional[str] = None) -> None

`read_path`

read_path(self, path: str) -> bytes

`read_path`

read_path(self, path: str) -> bytes

`write_path`

write_path(self, path: str, content: bytes) -> str

`write_path`

write_path(self, path: str, content: bytes) -> None

`NullFileSystem`

A file system that does not store any data. Methods:

`get_directory`

get_directory(self, from_path: Optional[str] = None, local_path: Optional[str] = None) -> None

`put_directory`

put_directory(self, local_path: Optional[str] = None, to_path: Optional[str] = None, ignore_file: Optional[str] = None) -> None

`read_path`

read_path(self, path: str) -> None

`write_path`

write_path(self, path: str, content: bytes) -> None

API Reference

​prefect.filesystems

​Classes

​ReadableFileSystem

​aload

​annotation_refers_to_block_class

​block_initialization

​delete

​get_block_capabilities

​get_block_class_from_key

​get_block_class_from_schema

​get_block_placeholder

​get_block_schema_version

​get_block_type_name

​get_block_type_slug

​get_code_example

​get_description

​is_block_class

​load

​load_from_ref

​model_dump

​model_json_schema

​model_validate

​read_path

​register_type_and_schema

​save

​ser_model

​validate_block_type_slug

​WritableFileSystem

​aload

​annotation_refers_to_block_class

​block_initialization

​delete

​get_block_capabilities

​get_block_class_from_key

​get_block_class_from_schema

​get_block_placeholder

​get_block_schema_version

​get_block_type_name

​get_block_type_slug

​get_code_example

​get_description

​is_block_class

​load

​load_from_ref

​model_dump

​model_json_schema

​model_validate

​read_path

​register_type_and_schema

​save

​ser_model

​validate_block_type_slug

​write_path

​ReadableDeploymentStorage

​aload

​annotation_refers_to_block_class

​block_initialization

​delete

​get_block_capabilities

​get_block_class_from_key

​get_block_class_from_schema

​get_block_placeholder

​get_block_schema_version

​get_block_type_name

​get_block_type_slug

​get_code_example

​get_description

​get_directory

​is_block_class

​load

​load_from_ref

​model_dump

​model_json_schema

​model_validate

​register_type_and_schema

​save

​ser_model

​validate_block_type_slug

​WritableDeploymentStorage

`prefect.filesystems`

Classes

`ReadableFileSystem`

`aload`

`annotation_refers_to_block_class`

`block_initialization`

`delete`

`get_block_capabilities`

`get_block_class_from_key`

`get_block_class_from_schema`

`get_block_placeholder`

`get_block_schema_version`

`get_block_type_name`

`get_block_type_slug`

`get_code_example`

`get_description`

`is_block_class`

`load`

`load_from_ref`

`model_dump`

`model_json_schema`

`model_validate`

`read_path`

`register_type_and_schema`

`save`

`ser_model`

`validate_block_type_slug`

`WritableFileSystem`

`aload`

`annotation_refers_to_block_class`

`block_initialization`

`delete`

`get_block_capabilities`

`get_block_class_from_key`

`get_block_class_from_schema`

`get_block_placeholder`

`get_block_schema_version`

`get_block_type_name`

`get_block_type_slug`

`get_code_example`

`get_description`

`is_block_class`

`load`

`load_from_ref`

`model_dump`

`model_json_schema`

`model_validate`

`read_path`

`register_type_and_schema`

`save`

`ser_model`

`validate_block_type_slug`

`write_path`

`ReadableDeploymentStorage`

`aload`

`annotation_refers_to_block_class`

`block_initialization`

`delete`

`get_block_capabilities`

`get_block_class_from_key`

`get_block_class_from_schema`

`get_block_placeholder`

`get_block_schema_version`

`get_block_type_name`

`get_block_type_slug`

`get_code_example`

`get_description`

`get_directory`

`is_block_class`

`load`

`load_from_ref`

`model_dump`

`model_json_schema`

`model_validate`

`register_type_and_schema`

`save`

`ser_model`

`validate_block_type_slug`

`WritableDeploymentStorage`

`aload`