MeshTag¶

class MeshTag(meta, value=None, key=None, sly_id=None, labeler_login=None, updated_at=None, created_at=None)[source]¶

Bases: PointcloudTag

Tag attached to a mesh annotation.

Tag on point cloud annotation.

Parameters:

meta¶: Tag metadata (name, value type).
value : str or int or float, optional¶: Tag value; type must match TagMeta.value_type.
key : uuid.UUID, optional¶: UUID key. Auto-generated if not provided.
sly_id : int, optional¶: Server-side tag ID.
labeler_login : str, optional¶: Login of user who created the tag.
updated_at : str, optional¶: Last modification timestamp (ISO format).
created_at : str, optional¶: Creation timestamp (ISO format).

Raises:

ValueError – If value is incompatible with TagMeta.value_type.

Usage Example:

import supervisely as sly

meta_dog = sly.TagMeta('dog', sly.TagValueType.NONE)
tag_dog = sly.PointcloudTag(meta_dog)

meta_cat = sly.TagMeta('cat', sly.TagValueType.ANY_STRING)
tag_cat = sly.PointcloudTag(meta_cat, value="Fluffy")

Methods

`clone`	Return a copy of the tag with the given fields overridden.
`from_json`	Convert a json dict to VideoTag.
`get_compact_str`	Get string with information about PointcloudTag name and value.
`get_header_ptable`	Get header of the table with tags.
`get_row_ptable`	Get row with tag properties.
`key`	Get PointcloudTag key value.
`to_json`	Convert the PointcloudTag to a json dict.

Attributes

`meta`	General information about Tag.
`name`	Name property.
`value`	Tag value.

classmethod from_json(data, tag_meta_collection, key_id_map=None)¶

Convert a json dict to VideoTag. Read more about Supervisely format.

Parameters:

data : dict¶: PointcloudTag in json format as a dict.
tag_meta_collection¶: Tag metadata collection.
key_id_map=None¶: Key ID map.

Returns:

Pointcloud tag.

Return type:

PointcloudTag

Usage Example:

import supervisely as sly

tag_cat_json = {"name": "cat", "value": "Fluffy"}
meta_cat = sly.TagMeta('cat', sly.TagValueType.ANY_STRING)
meta_collection = sly.TagMetaCollection([meta_cat])
tag_cat = sly.PointcloudTag.from_json(tag_cat_json, meta_collection)

classmethod get_header_ptable()¶

Get header of the table with tags.

Returns:

List of table header values.

Return type:

List[str]

Usage Example:

import supervisely as sly

header = sly.Tag.get_header_ptable()

print(header)
# Output: ['Name', 'Value type', 'Value']

clone(meta=None, value=None, key=None, sly_id=None, labeler_login=None, updated_at=None, created_at=None)[source]¶

Return a copy of the tag with the given fields overridden.

Any argument left as None keeps the current value of the tag.

Parameters:

meta=None¶: New tag meta.
value : Optional[Union[str, int, float]]¶: New tag value.
key : Optional[uuid.UUID]¶: New unique identifier.
sly_id : Optional[int]¶: New tag ID in Supervisely.
labeler_login : Optional[str]¶: New labeler login.
updated_at : Optional[str]¶: New update timestamp.
created_at : Optional[str]¶: New creation timestamp.

Returns:

New mesh tag with the overridden fields.

Return type:

MeshTag

get_compact_str()¶

Get string with information about PointcloudTag name and value.

Returns:

Information about PointcloudTag object

Return type:

str

Usage Example:

import supervisely as sly
meta_cat = sly.TagMeta('cat', sly.TagValueType.ANY_STRING)
tag_cat = sly.PointcloudTag(meta_cat, value="Fluffy")
compact_tag_cat = tag_cat.get_compact_str()

print(compact_tag_cat) # cat:Fluffy

get_row_ptable()¶

Get row with tag properties.

Returns:

List of tag properties.

Return type:

List[str]

Usage Example:

import supervisely as sly

weather_conditions = ["Sunny", "Cloudy", "Snowy", "Foggy", "Rainy"]
meta_weather = sly.TagMeta("weather", sly.TagValueType.ONEOF_STRING, possible_values=weather_conditions)
tag_weather = sly.Tag(meta_weather, value="Sunny")

row = tag_weather.get_row_ptable()

print(row)
# Output: ['weather', 'oneof_string', 'Sunny']

key()¶

Get PointcloudTag key value.

Returns:

PointcloudTag key value

Return type:

uuid.UUID

Usage Example:

import supervisely as sly

weather_conditions = ["Sunny", "Cloudy", "Snowy", "Foggy", "Rainy"]
meta_weather = sly.TagMeta("weather", sly.TagValueType.ONEOF_STRING, possible_values=weather_conditions)
tag_weather = sly.Tag(meta_weather, value="Sunny")
key = tag_weather.key()

print(key)
# Output: 5c7988e0-eee4-4eb1-972c-b1e3e879f78c

to_json(key_id_map=None)¶

Convert the PointcloudTag to a json dict. Read more about Supervisely format.

Parameters:

key_id_map=None¶: Key ID map.

Returns:

Json format as a dict

Return type:

dict

Usage Example:

import supervisely as sly
meta_dog = sly.TagMeta('dog', sly.TagValueType.NONE)
tag_dog = sly.PointcloudTag(meta_dog)
tag_dog_json = tag_dog.to_json()

print(tag_dog_json)
# Output: {
#     "name": "dog",
#     "key": "058ad7993a534082b4d94cc52542a97d"
# }

property meta : supervisely.annotation.tag_meta.TagMeta¶

General information about Tag. When creating a new Tag, it’s value is automatically cross-checked against TagValueType to make sure that value is valid.

Returns:

TagMeta object

Return type:

TagMeta

Usage Example:

meta_dog = sly.TagMeta('dog', sly.TagValueType.NONE)
tag_dog = sly.Tag(meta_dog)

# Our TagMeta has value type 'NONE', if we try to add value to our Tag, "ValueError" error will be raised
tag_dog = sly.Tag(meta_dog, value="Husky")
# Output: ValueError: Tag dog can not have value Husky

property name : str¶

Name property.

Returns:

Name

Return type:

str

Usage Example:

meta_dog = sly.TagMeta('dog', sly.TagValueType.ANY_STRING)
tag_dog = sly.Tag(meta_dog, value="Husky")

print(tag_dog.name)
# Output: "dog"

property value : str¶

Tag value. Return type depends on TagValueType. Date tag values are returned as ISO datetime strings.

Returns:

Tag value

Return type:

str, int or float or None

Usage Example:

meta_dog = sly.TagMeta('dog', sly.TagValueType.ANY_STRING)
tag_dog = sly.Tag(meta_dog, value="Husky")

meta_age = sly.TagMeta('age', sly.TagValueType.ANY_NUMBER)
tag_age = sly.Tag(meta_age, value=9)

colors = ["Black", "White", "Golden", "Brown"]
meta_color = sly.TagMeta('coat color', sly.TagValueType.ONEOF_STRING, possible_values=colors)
tag_color = sly.Tag(meta_color, value="White")

meta_date = sly.TagMeta('reviewed_at', sly.TagValueType.DATE)
tag_date = sly.Tag(meta_date, value="2026-04-23T15:15:48")

type(tag_dog.value)   # 'str'
type(tag_age.value)   # 'int'
type(tag_color.value) # 'str'
type(tag_date.value)  # 'str'