# Sentences

Module for handling document sentences.

This module provides the Sentence class, which represents a structured unit of text
within a document paragraph. Sentences are the fundamental building blocks of text analysis,
containing the raw text content of individual statements.

The module supports validation to ensure data integrity and integrates with the paragraph
structure to maintain the hierarchical organization of document content.

### *class* contextgem.public.sentences.Sentence(\*\*data)

Bases: `_Sentence`

Represents a sentence within a document paragraph.

Sentences are immutable text units that serve as the fundamental building blocks for
document analysis. The raw text content is preserved and cannot be modified after
initialization to maintain data integrity.

* **Variables:**
  * **raw_text** ([*str*](https://docs.python.org/3/builtins/stdtypes.html#str)) – The complete text content of the sentence. This value is frozen after initialization.
  * **additional_context** ([*str*](https://docs.python.org/3/builtins/stdtypes.html#str) *|* *None*) – Optional supplementary information about the sentence, as a
    single-line string. It is passed to the LLM together with the sentence text in the prompts
    that list sentences, i.e. when sentence-level references are used
    (`reference_depth="sentences"`). A decision model is sent it together with
    the sentence text when aspects are extracted with sentences as their items.
    Sentences that are segmented automatically inherit
    the additional context of their paragraph. Defaults to None.
* **Parameters:**
  * **custom_data** ([*Annotated*](https://docs.python.org/3/library/typing.html#typing.Annotated) *[*[*dict*](https://docs.python.org/3/builtins/stdtypes.html#dict) *[*[*str*](https://docs.python.org/3/builtins/stdtypes.html#str) *,* [*Any*](https://docs.python.org/3/library/typing.html#typing.Any) *]* *,* [*BeforeValidator*](https://pydantic.dev/docs/validation/latest/api/pydantic/functional_validators/#pydantic.functional_validators.BeforeValidator) *(**func=~contextgem.internal.typings.validators._validate_is_json_dict* *,* *json_schema_input_type=PydanticUndefined* *)* *]*)
  * **additional_context** ([*Annotated*](https://docs.python.org/3/library/typing.html#typing.Annotated) *[*[*str*](https://docs.python.org/3/builtins/stdtypes.html#str) *,* [*Strict*](https://pydantic.dev/docs/validation/latest/api/pydantic/types/#pydantic.types.Strict) *(**strict=True* *)* *,* [*StringConstraints*](https://pydantic.dev/docs/validation/latest/api/pydantic/types/#pydantic.types.StringConstraints) *(**strip_whitespace=True* *,* *to_upper=None* *,* *to_lower=None* *,* *strict=None* *,* *min_length=1* *,* *max_length=None* *,* *pattern=None* *,* *ascii_only=None* *)* *]*  *|* *None*)
  * **raw_text** ([*Annotated*](https://docs.python.org/3/library/typing.html#typing.Annotated) *[*[*str*](https://docs.python.org/3/builtins/stdtypes.html#str) *,* [*Strict*](https://pydantic.dev/docs/validation/latest/api/pydantic/types/#pydantic.types.Strict) *(**strict=True* *)* *,* [*StringConstraints*](https://pydantic.dev/docs/validation/latest/api/pydantic/types/#pydantic.types.StringConstraints) *(**strip_whitespace=True* *,* *to_upper=None* *,* *to_lower=None* *,* *strict=None* *,* *min_length=1* *,* *max_length=None* *,* *pattern=None* *,* *ascii_only=None* *)* *]*)

Note:
: Normally, you do not need to construct sentences manually, as they are populated automatically
  from document’s `raw_text` or `paragraphs` attributes. Only use this constructor for
  advanced use cases, such as when you have a custom paragraph/sentence segmentation tool.

Example:
: ```python
  from contextgem import Sentence
  <br/>
  <br/>
  # Create a sentence with raw text content
  sentence = Sentence(raw_text="This is a simple sentence.")
  <br/>
  # Sentences are immutable - their content cannot be changed after creation
  try:
      sentence.raw_text = "Attempting to modify the sentence."
  except ValueError as e:
      print(f"Error when trying to modify sentence: {e}")
  ```

Create a new model by parsing and validating input data from keyword arguments.

Raises [ValidationError][pydantic_core.ValidationError] if the input data cannot be
validated to form a valid model.

self is explicitly positional-only to allow self as a field name.

#### clone()

Creates and returns a deep copy of the current instance.

* **Return type:**
  [`typing.Self`](https://docs.python.org/3/library/typing.html#typing.Self)
* **Returns:**
  A deep copy of the current instance.

#### *classmethod* from_dict(obj_dict)

Reconstructs an instance of the class from a dictionary representation.

This method deserializes a dictionary containing the object’s attributes and values
into a new instance of the class. It handles complex nested structures like aspects,
concepts, and extracted items, properly reconstructing each component.

A deserialized model or model group has no API credentials, as they are not
included in the serialized data, i.e. they are to be set again.

* **Parameters:**
  **obj_dict** ([`dict`](https://docs.python.org/3/builtins/stdtypes.html#dict)[[`str`](https://docs.python.org/3/builtins/stdtypes.html#str), [`typing.Any`](https://docs.python.org/3/library/typing.html#typing.Any)]) – Dictionary containing the serialized object data.
* **Returns:**
  A new instance of the class with restored attributes.
* **Return type:**
  [`typing.Self`](https://docs.python.org/3/library/typing.html#typing.Self)

#### *classmethod* from_disk(file_path)

Loads an instance of the class from a JSON file stored on disk.

This method reads the JSON content from the specified file path and
deserializes it into an instance of the class using the from_json
method.

* **Parameters:**
  **file_path** ([`str`](https://docs.python.org/3/builtins/stdtypes.html#str) | [`pathlib.Path`](https://docs.python.org/3/library/pathlib.html#pathlib.Path)) – Path to the JSON file to load (must end with ‘.json’).
  Can be a string or a Path object.
* **Returns:**
  An instance of the class populated with the data from the file.
* **Return type:**
  [`typing.Self`](https://docs.python.org/3/library/typing.html#typing.Self)
* **Raises:**
  * [**ValueError**](https://docs.python.org/3/builtins/exceptions.html#ValueError) – If the file path doesn’t end with ‘.json’, or if the file
    does not hold valid serialized data, e.g. it is not a valid UTF-8 text
    (`UnicodeDecodeError`) or JSON (`json.JSONDecodeError`), or the data
    fails validation (pydantic’s `ValidationError`). These errors are
    subclasses of `ValueError`.
  * [**TypeError**](https://docs.python.org/3/builtins/exceptions.html#TypeError) – If the serialized data is of another class.
  * [**OSError**](https://docs.python.org/3/builtins/exceptions.html#OSError) – If the file cannot be read, e.g. it does not exist.
    The error is the one raised by the file operation, e.g.
    `FileNotFoundError` or `PermissionError`.

#### *classmethod* from_json(json_string)

Creates an instance of the class from a JSON string representation.

This method deserializes the provided JSON string into a dictionary and uses
the from_dict method to construct the class instance. It validates that the
class name in the serialized data matches the current class.

* **Parameters:**
  **json_string** ([`str`](https://docs.python.org/3/builtins/stdtypes.html#str)) – JSON string containing the serialized object data.
* **Returns:**
  A new instance of the class with restored state.
* **Return type:**
  [`typing.Self`](https://docs.python.org/3/library/typing.html#typing.Self)
* **Raises:**
  * [**json.JSONDecodeError**](https://docs.python.org/3/library/json.html#json.JSONDecodeError) – If the string is not a valid JSON. The error
    gives the position of what is invalid, and does not hold the string.
  * [**ValueError**](https://docs.python.org/3/builtins/exceptions.html#ValueError) – If the JSON value is not an object with a class name,
    i.e. not serialized data.
  * [**TypeError**](https://docs.python.org/3/builtins/exceptions.html#TypeError) – If the class name in the serialized data doesn’t match.

#### to_dict()

Transforms the current object into a dictionary representation.

Converts the object to a dictionary that includes:
- All public attributes
- Special handling for specific public and private attributes

When a model or model group is serialized, its API credentials and usage/cost stats are removed.

* **Returns:**
  A dictionary representation of the current object with all necessary data for serialization
* **Return type:**
  [`dict`](https://docs.python.org/3/builtins/stdtypes.html#dict)[[`str`](https://docs.python.org/3/builtins/stdtypes.html#str), [`typing.Any`](https://docs.python.org/3/library/typing.html#typing.Any)]

#### to_disk(file_path)

Saves the serialized instance to a JSON file at the specified path.

This method converts the instance to a dictionary representation using to_dict(),
then writes it to disk as a formatted JSON file with UTF-8 encoding.

* **Parameters:**
  **file_path** ([`str`](https://docs.python.org/3/builtins/stdtypes.html#str) | [`pathlib.Path`](https://docs.python.org/3/library/pathlib.html#pathlib.Path)) – Path where the JSON file should be saved (must end with ‘.json’).
  Can be a string or a Path object.
* **Return type:**
  [`None`](https://docs.python.org/3/builtins/constants.html#None)
* **Returns:**
  None
* **Raises:**
  * [**ValueError**](https://docs.python.org/3/builtins/exceptions.html#ValueError) – If the file path doesn’t end with ‘.json’.
  * [**OSError**](https://docs.python.org/3/builtins/exceptions.html#OSError) – If the file cannot be written, e.g. its directory does not
    exist. The error is the one raised by the file operation, e.g.
    `FileNotFoundError` or `PermissionError`.

#### to_json()

Converts the object to its JSON string representation.

Serializes the object into a JSON-formatted string using the dictionary
representation provided by the to_dict() method.

* **Returns:**
  A JSON string representation of the object.
* **Return type:**
  [`str`](https://docs.python.org/3/builtins/stdtypes.html#str)

#### *property* unique_id *: [str](https://docs.python.org/3/builtins/stdtypes.html#str)*

Returns the ULID of the instance.

#### raw_text *: [Annotated](https://docs.python.org/3/library/typing.html#typing.Annotated)[[str](https://docs.python.org/3/builtins/stdtypes.html#str), [Strict](https://pydantic.dev/docs/validation/latest/api/pydantic/types/#pydantic.types.Strict)(strict=True), [StringConstraints](https://pydantic.dev/docs/validation/latest/api/pydantic/types/#pydantic.types.StringConstraints)(strip_whitespace=True, to_upper=[None](https://docs.python.org/3/builtins/constants.html#None), to_lower=[None](https://docs.python.org/3/builtins/constants.html#None), strict=[None](https://docs.python.org/3/builtins/constants.html#None), min_length=1, max_length=[None](https://docs.python.org/3/builtins/constants.html#None), pattern=[None](https://docs.python.org/3/builtins/constants.html#None), ascii_only=[None](https://docs.python.org/3/builtins/constants.html#None))]*

#### additional_context *: [Annotated](https://docs.python.org/3/library/typing.html#typing.Annotated)[[str](https://docs.python.org/3/builtins/stdtypes.html#str), [Strict](https://pydantic.dev/docs/validation/latest/api/pydantic/types/#pydantic.types.Strict)(strict=True), [StringConstraints](https://pydantic.dev/docs/validation/latest/api/pydantic/types/#pydantic.types.StringConstraints)(strip_whitespace=True, to_upper=[None](https://docs.python.org/3/builtins/constants.html#None), to_lower=[None](https://docs.python.org/3/builtins/constants.html#None), strict=[None](https://docs.python.org/3/builtins/constants.html#None), min_length=1, max_length=[None](https://docs.python.org/3/builtins/constants.html#None), pattern=[None](https://docs.python.org/3/builtins/constants.html#None), ascii_only=[None](https://docs.python.org/3/builtins/constants.html#None))] | [None](https://docs.python.org/3/builtins/constants.html#None)*

#### custom_data *: [Annotated](https://docs.python.org/3/library/typing.html#typing.Annotated)[[dict](https://docs.python.org/3/builtins/stdtypes.html#dict)[[str](https://docs.python.org/3/builtins/stdtypes.html#str), [Any](https://docs.python.org/3/library/typing.html#typing.Any)], [BeforeValidator](https://pydantic.dev/docs/validation/latest/api/pydantic/functional_validators/#pydantic.functional_validators.BeforeValidator)(func=\_validate_is_json_dict, json_schema_input_type=PydanticUndefined)]*