# fiftyone.core.groups¶

Sample groups.

Classes:

 Group(*args, **kwargs) A named group membership.

Functions:

 is_group_field(field) Determines whether the given field is a group field.
class fiftyone.core.groups.Group(*args, **kwargs)

A named group membership.

Parameters
• id (None) – the group ID

• name (None) – the group name

Attributes:

 STRICT field_names An ordered tuple of the public fields of this document. id An Object ID field. name A unicode string field.

Methods:

 Hook for doing document level data cleaning (usually validation or assignment) before validation is run. clear_field(field_name) Clears the field from the document. Returns a deep copy of the document. element(name) fancy_repr([class_name, select_fields, …]) Generates a customizable string representation of the document. field_to_mongo(field_name) field_to_python(field_name, value) from_dict(d[, extended]) Loads the document from a BSON/JSON dictionary. Loads the document from a JSON string. get_field(field_name) Gets the field of the document. Get text score from text query has_field(field_name) Determines whether the document has a field of the given name. Returns an iterator over the (name, value) pairs of the public fields of the document. merge(doc[, merge_lists, merge_dicts, overwrite]) Merges the contents of the given document into this document. set_field(field_name, value[, create, …]) Sets the value of a field of the document. to_dict([extended]) Serializes this document to a BSON/JSON dictionary. to_json([pretty_print]) Serializes the document to a JSON string. to_mongo(*args, **kwargs) Return as SON data ready for use with MongoDB. validate([clean]) Ensure that all fields’ values are valid and that required fields are present.

Classes:

 my_metaclass alias of mongoengine.base.metaclasses.DocumentMetaclass
id

An Object ID field.

Parameters
• description (None) – an optional description

• info (None) – an optional info dict

name

A unicode string field.

Parameters
• description (None) – an optional description

• info (None) – an optional info dict

element(name)
STRICT = False
clean()

Hook for doing document level data cleaning (usually validation or assignment) before validation is run.

Any ValidationError raised by this method will not be associated with a particular field; it will have a special-case association with the field defined by NON_FIELD_ERRORS.

clear_field(field_name)

Clears the field from the document.

Parameters

field_name – the field name

Raises

ValueError – if the field does not exist

copy()

Returns a deep copy of the document.

Returns

a SerializableDocument

fancy_repr(class_name=None, select_fields=None, exclude_fields=None, **kwargs)

Generates a customizable string representation of the document.

Parameters
• class_name (None) – optional class name to use

• select_fields (None) – iterable of field names to restrict to

• exclude_fields (None) – iterable of field names to exclude

• **kwargs – additional key-value pairs to include in the string representation

Returns

a string representation of the document

property field_names

An ordered tuple of the public fields of this document.

field_to_mongo(field_name)
field_to_python(field_name, value)
classmethod from_dict(d, extended=False)

Loads the document from a BSON/JSON dictionary.

Parameters
• d – a dictionary

• extended (False) – whether the input dictionary may contain serialized extended JSON constructs

Returns

a SerializableDocument

classmethod from_json(s)

Loads the document from a JSON string.

Returns

a SerializableDocument

get_field(field_name)

Gets the field of the document.

Parameters

field_name – the field name

Returns

the field value

Raises

AttributeError – if the field does not exist

get_text_score()

Get text score from text query

has_field(field_name)

Determines whether the document has a field of the given name.

Parameters

field_name – the field name

Returns

True/False

iter_fields()

Returns an iterator over the (name, value) pairs of the public fields of the document.

Returns

an iterator that emits (name, value) tuples

merge(doc, merge_lists=True, merge_dicts=True, overwrite=True)

Merges the contents of the given document into this document.

Parameters
• doc – a SerializableDocument of same type as this document

• merge_lists (True) – whether to merge the elements of top-level list fields rather than treating the list as a single value

• merge_dicts (True) – whether to recursively merge the contents of top-level dict fields rather than treating the dict as a single value

• overwrite (True) – whether to overwrite (True) or skip (False) existing fields

my_metaclass

alias of mongoengine.base.metaclasses.DocumentMetaclass Methods:

 mro Return a type’s method resolution order.
set_field(field_name, value, create=True, validate=True, dynamic=False)

Sets the value of a field of the document.

Parameters
• field_name – the field name

• value – the field value

• create (True) – whether to create the field if it does not exist

Raises

ValueError – if field_name is not an allowed field name or does not exist and create == False

to_dict(extended=False)

Serializes this document to a BSON/JSON dictionary.

Parameters

extended (False) – whether to serialize extended JSON constructs such as ObjectIDs, Binary, etc. into JSON format

Returns

a dict

to_json(pretty_print=False)

Serializes the document to a JSON string.

Parameters

pretty_print (False) – whether to render the JSON in human readable format with newlines and indentations

Returns

a JSON string

to_mongo(*args, **kwargs)

Return as SON data ready for use with MongoDB.

validate(clean=True)

Ensure that all fields’ values are valid and that required fields are present.

Raises ValidationError if any of the fields’ values are found to be invalid.

fiftyone.core.groups.is_group_field(field)

Determines whether the given field is a group field.

Parameters
Returns

True/False