# Batch

class `openff.evaluator.server.``Batch`

  Represents a batch of physical properties which are being estimated by the server for a given set of force field parameters.

  The expectation is that this object will be passed between calculation layers, whereby each layer will attempt to estimate each of the queued_properties. Those properties which can be estimated will be moved to the estimated_properties set, while those that couldn’t will remain in the queued_properties set ready for the next layer.

  `__init__`()

    Initialize self. See help(type(self)) for accurate signature.

  Methods

  `__init__` | Initialize self.
  `from_json`(file_path) | Create this object from a JSON file.
  `get_attributes`([attribute_type]) | Returns all attributes of a specific attribute_type.
  `json`([file_path, format]) | Creates a JSON representation of this class.
  `parse_json`(string_contents[, encoding]) | Parses a typed json string into the corresponding class structure.
  `validate`([attribute_type]) | Validate the values of the attributes.

  Attributes

  `estimated_properties` | The set of properties which have been successfully estimated.
  `exceptions` | The set of properties which have yet to be, or are currently being estimated.
  `force_field_id` | The id of the force field being used to estimatethis batch of properties.
  `id` | The unique id of this batch.
  `options` | The options being used to estimate this batch.
  `parameter_gradient_keys` | The parameters that this batch of physical properties should be differentiated with respect to.
  `queued_properties` | The set of properties which have yet to be estimated.
  `unsuccessful_properties` | The set of properties which have been could not be estimated.

  `id`

    The unique id of this batch.

    Type

      str

  `force_field_id`

    The id of the force field being used to estimatethis batch of properties. The default value of this attribute is not set and must be set by the user..

    Type

      str

  `options`

    The options being used to estimate this batch. The default value of this attribute is not set and must be set by the user..

    Type

      RequestOptions

  `parameter_gradient_keys`

    The parameters that this batch of physical properties should be differentiated with respect to. The default value of this attribute is not set and must be set by the user..

    Type

      list

  `queued_properties`

    The set of properties which have yet to be estimated. The default value of this attribute is `[]`.

    Type

      list

  `estimated_properties`

    The set of properties which have been successfully estimated. The default value of this attribute is `[]`.

    Type

      list

  `unsuccessful_properties`

    The set of properties which have been could not be estimated. The default value of this attribute is `[]`.

    Type

      list

  `exceptions`

    The set of properties which have yet to be, or are currently being estimated. The default value of this attribute is `[]`.

    Type

      list

  `validate`(attribute_type=None)

    Validate the values of the attributes. If attribute_type is set, only attributes of that type will be validated.

    Parameters

      attribute_type (type of Attribute, optional) – The type of attribute to validate.

    Raises

      ValueError or AssertionError –

  classmethod `from_json`(file_path)

    Create this object from a JSON file.

    Parameters

      file_path (str) – The path to load the JSON from.

    Returns

      The parsed class.

    Return type

      cls

  classmethod `get_attributes`(attribute_type=None)

    Returns all attributes of a specific attribute_type.

    Parameters

      attribute_type (type of Attribute, optional) – The type of attribute to search for.

    Returns

      The names of the attributes of the specified type.

    Return type

      list of str

  `json`(file_path=None, format=False)

    Creates a JSON representation of this class.

    Parameters

      - file_path (str , optional) – The (optional) file path to save the JSON file to.

      - format (bool) – Whether to format the JSON or not.

    Returns

      The JSON representation of this class.

    Return type

      str

  classmethod `parse_json`(string_contents, encoding='utf8')

    Parses a typed json string into the corresponding class structure.

    Parameters

      - string_contents (str or bytes) – The typed json string.

      - encoding (str) – The encoding of the string_contents.

    Returns

      The parsed class.

    Return type

      Any