Character Level Cnn Model

Contains classes for char data labeling.

dataprofiler.labelers.character_level_cnn_model.build_embd_dictionary(filename: str) → Dict[str, numpy.ndarray]

Return a numpy embedding dictionary from embed file with GloVe-like format.

Parameters

filename (str) – Path to the embed file for loading

dataprofiler.labelers.character_level_cnn_model.create_glove_char(n_dims: int, source_file: Optional[str] = None) → None

Embed GloVe chars embeddings from source file to n_dims principal components.

Embed in a new file.

Parameters

  • n_dims (int) – Final number of principal component dims of the embeddings

  • source_file (str) – Location of original embeddings to factor down

class dataprofiler.labelers.character_level_cnn_model.CharacterLevelCnnModel(label_mapping: Dict[str, int], parameters: Optional[Dict] = None)

Bases: dataprofiler.labelers.base_model.BaseTrainableModel

Class for training char data labeler.

Initialize CNN Model.

Initialize epoch_id.

Parameters

  • label_mapping (dict) – maps labels to their encoded integers

  • parameters (dict) –

    Contains all the appropriate parameters for the model. Must contain num_labels. Other possible parameters are:

    max_length, max_char_encoding_id, dim_embed, size_fc dropout, size_conv, num_fil, optimizer, default_label

Returns

None

requires_zero_mapping: bool = True
set_label_mapping(label_mapping: Union[List[str], Dict[str, int]]) → None

Set the labels for the model.

Parameters

label_mapping (dict) – label mapping of the model

Returns

None

save_to_disk(dirpath: str) → None

Save whole model to disk with weights.

Parameters

dirpath (str) – directory path where you want to save the model to

Returns

None

classmethod load_from_disk(dirpath: str) → dataprofiler.labelers.character_level_cnn_model.CharacterLevelCnnModel

Load whole model from disk with weights.

Parameters

dirpath (str) – directory path where you want to load the model from

Returns

None

reset_weights() → None

Reset the weights of the model.

Returns

None

fit(train_data: Union[pandas.core.frame.DataFrame, pandas.core.series.Series, numpy.ndarray], val_data: Optional[Union[pandas.core.frame.DataFrame, pandas.core.series.Series, numpy.ndarray]] = None, batch_size: Optional[int] = None, epochs: Optional[int] = None, label_mapping: Optional[Dict[str, int]] = None, reset_weights: bool = False, verbose: bool = True) → Tuple[Dict, Optional[float], Dict]

Train the current model with the training data and validation data.

Parameters

  • train_data (Union[list, np.ndarray]) – Training data used to train model

  • val_data (Union[list, np.ndarray]) – Validation data used to validate the training

  • batch_size (int) – Used to determine number of samples in each batch

  • label_mapping (Union[dict, None]) – maps labels to their encoded integers

  • reset_weights (bool) – Flag to determine whether to reset the weights or not

  • verbose (bool) – Flag to determine whether to print status or not

Returns

history, f1, f1_report

Return type

Tuple[dict, float, dict]

predict(data: Union[pandas.core.frame.DataFrame, pandas.core.series.Series, numpy.ndarray], batch_size: int = 32, show_confidences: bool = False, verbose: bool = True) → Dict

Run model and get predictions.

Parameters

  • data (Union[list, numpy.ndarray]) – text input

  • batch_size (int) – number of samples in the batch of data

  • show_confidences – whether user wants prediction confidences

  • verbose (bool) – Flag to determine whether to print status or not

Returns

char level predictions and confidences

Return type

dict

details() → None

Print the relevant details of the model.

Details include summary, parameters, and label mapping.

add_label(label: str, same_as: Optional[str] = None) → None

Add a label to the data labeler.

Parameters

  • label (str) – new label being added to the data labeler

  • same_as (str) – label to have the same encoding index as for multi-label to single encoding index.

Returns

None

classmethod get_class(class_name: str) → Optional[Type[dataprofiler.labelers.base_model.BaseModel]]

Get subclasses.

get_parameters(param_list: Optional[List[str]] = None) → Dict

Return a dict of parameters from the model given a list.

Parameters

param_list (List[str]) – list of parameters to retrieve from the model.

Returns

dict of parameters

classmethod help() → None

Help describe alterable parameters.

Returns

None

property label_mapping: Dict[str, int]

Return mapping of labels to their encoded values.

property labels: List[str]

Retrieve the label.

Returns

list of labels

property num_labels: int

Return max label mapping.

property reverse_label_mapping: Dict[int, str]

Return reversed order of current labels.

Useful for when needed to extract Labels via indices.

set_params(**kwargs: Any) → None

Set the parameters if they exist given kwargs.