Anomaly Detection

pycaret.anomaly.setup(data, ordinal_features: Optional[Dict[str, list]] = None, numeric_features: Optional[List[str]] = None, categorical_features: Optional[List[str]] = None, date_features: Optional[List[str]] = None, text_features: Optional[List[str]] = None, ignore_features: Optional[List[str]] = None, keep_features: Optional[List[str]] = None, preprocess: bool = True, imputation_type: Optional[str] = 'simple', numeric_imputation: str = 'mean', categorical_imputation: str = 'constant', text_features_method: str = 'tf-idf', max_encoding_ohe: int = 5, encoding_method: Optional[Any] = None, polynomial_features: bool = False, polynomial_degree: int = 2, low_variance_threshold: float = 0, remove_multicollinearity: bool = False, multicollinearity_threshold: float = 0.9, bin_numeric_features: Optional[List[str]] = None, remove_outliers: bool = False, outliers_method: str = 'iforest', outliers_threshold: float = 0.05, transformation: bool = False, transformation_method: str = 'yeo-johnson', normalize: bool = False, normalize_method: str = 'zscore', pca: bool = False, pca_method: str = 'linear', pca_components: Union[int, float] = 1.0, custom_pipeline: Optional[Any] = None, n_jobs: Optional[int] = - 1, use_gpu: bool = False, html: bool = True, session_id: Optional[int] = None, system_log: Union[bool, logging.Logger] = True, log_experiment: bool = False, experiment_name: Optional[str] = None, experiment_custom_tags: Optional[Dict[str, Any]] = None, log_plots: Union[bool, list] = False, log_profile: bool = False, log_data: bool = False, silent: bool = False, verbose: bool = True, memory: Union[bool, str, joblib.memory.Memory] = True, profile: bool = False, profile_kwargs: Optional[Dict[str, Any]] = None)

This function initializes the training environment and creates the transformation pipeline. Setup function must be called before executing any other function. It takes one mandatory parameter: data. All the other parameters are optional.

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
data: dataframe-like

Shape (n_samples, n_features), where n_samples is the number of samples and n_features is the number of features.

ordinal_features: dict, default = None

Categorical features to be encoded ordinally. For example, a categorical feature with ‘low’, ‘medium’, ‘high’ values where low < medium < high can be passed as ordinal_features = {‘column_name’ : [‘low’, ‘medium’, ‘high’]}.

numeric_features: list of str, default = None

If the inferred data types are not correct, the numeric_features param can be used to define the data types. It takes a list of strings with column names that are numeric.

categorical_features: list of str, default = None

If the inferred data types are not correct, the categorical_features param can be used to define the data types. It takes a list of strings with column names that are categorical.

date_features: list of str, default = None

If the inferred data types are not correct, the date_features param can be used to overwrite the data types. It takes a list of strings with column names that are DateTime.

text_features: list of str, default = None

Column names that contain a text corpus. If None, no text features are selected.

ignore_features: list of str, default = None

ignore_features param can be used to ignore features during preprocessing and model training. It takes a list of strings with column names that are to be ignored.

keep_features: list of str, default = None

keep_features param can be used to always keep specific features during preprocessing, i.e. these features are never dropped by any kind of feature selection. It takes a list of strings with column names that are to be kept.

preprocess: bool, default = True

When set to False, no transformations are applied except for train_test_split and custom transformations passed in custom_pipeline param. Data must be ready for modeling (no missing values, no dates, categorical data encoding), when preprocess is set to False.

imputation_type: str or None, default = ‘simple’

The type of imputation to use. Can be either ‘simple’ or ‘iterative’. If None, no imputation of missing values is performed.

numeric_imputation: str, default = ‘mean’

Missing values in numeric features are imputed with ‘mean’ value of the feature in the training dataset. The other available option is ‘median’ or ‘zero’.

categorical_imputation: str, default = ‘constant’

Missing values in categorical features are imputed with a constant ‘not_available’ value. The other available option is ‘mode’.

text_features_method: str, default = “tf-idf”

Method with which to embed the text features in the dataset. Choose between “bow” (Bag of Words - CountVectorizer) or “tf-idf” (TfidfVectorizer). Be aware that the sparse matrix output of the transformer is converted internally to its full array. This can cause memory issues for large text embeddings.

max_encoding_ohe: int, default = 5

Categorical columns with max_encoding_ohe or less unique values are encoded using OneHotEncoding. If more, the encoding_method estimator is used. Note that columns with exactly two classes are always encoded ordinally.

encoding_method: category-encoders estimator, default = None

A category-encoders estimator to encode the categorical columns with more than max_encoding_ohe unique values. If None, category_encoders.leave_one_out.LeaveOneOutEncoder is used.

polynomial_features: bool, default = False

When set to True, new features are derived using existing numeric features.

polynomial_degree: int, default = 2

Degree of polynomial features. For example, if an input sample is two dimensional and of the form [a, b], the polynomial features with degree = 2 are: [1, a, b, a^2, ab, b^2]. Ignored when polynomial_features is not True.

low_variance_threshold: float or None, default = 0

Remove features with a training-set variance lower than the provided threshold. The default is to keep all features with non-zero variance, i.e. remove the features that have the same value in all samples. If None, skip this treansformation step.

remove_multicollinearity: bool, default = False

When set to True, features with the inter-correlations higher than the defined threshold are removed. When two features are highly correlated with each other, the feature that is less correlated with the target variable is removed. Only considers numeric features.

multicollinearity_threshold: float, default = 0.9

Threshold for correlated features. Ignored when remove_multicollinearity is not True.

bin_numeric_features: list of str, default = None

To convert numeric features into categorical, bin_numeric_features parameter can be used. It takes a list of strings with column names to be discretized. It does so by using ‘sturges’ rule to determine the number of clusters and then apply KMeans algorithm. Original values of the feature are then replaced by the cluster label.

remove_outliers: bool, default = False

When set to True, outliers from the training data are removed using an Isolation Forest.

outliers_method: str, default = “iforest”
Method with which to remove outliers. Possible values are:

  • ‘iforest’: Uses sklearn’s IsolationForest.

  • ‘ee’: Uses sklearn’s EllipticEnvelope.

  • ‘lof’: Uses sklearn’s LocalOutlierFactor.

outliers_threshold: float, default = 0.05

The percentage outliers to be removed from the dataset. Ignored when remove_outliers=False.

transformation: bool, default = False

When set to True, it applies the power transform to make data more Gaussian-like. Type of transformation is defined by the transformation_method parameter.

transformation_method: str, default = ‘yeo-johnson’

Defines the method for transformation. By default, the transformation method is set to ‘yeo-johnson’. The other available option for transformation is ‘quantile’. Ignored when transformation is not True.

normalize: bool, default = False

When set to True, it transforms the features by scaling them to a given range. Type of scaling is defined by the normalize_method parameter.

normalize_method: str, default = ‘zscore’

Defines the method for scaling. By default, normalize method is set to ‘zscore’ The standard zscore is calculated as z = (x - u) / s. Ignored when normalize is not True. The other options are:

  • minmax: scales and translates each feature individually such that it is in the range of 0 - 1.

  • maxabs: scales and translates each feature individually such that the maximal absolute value of each feature will be 1.0. It does not shift/center the data, and thus does not destroy any sparsity.

  • robust: scales and translates each feature according to the Interquartile range. When the dataset contains outliers, robust scaler often gives better results.

pca: bool, default = False

When set to True, dimensionality reduction is applied to project the data into a lower dimensional space using the method defined in pca_method parameter.

pca_method: str, default = ‘linear’
Method with which to apply PCA. Possible values are:

  • ‘linear’: Uses Singular Value Decomposition.

  • kernel: Dimensionality reduction through the use of RBF kernel.

  • incremental: Similar to ‘linear’, but more efficient for large datasets.

pca_components: int or float, default = 1.0

Number of components to keep. If >1, it selects that number of components. If <= 1, it selects that fraction of components from the original features. The value must be smaller than the number of original features. This parameter is ignored when pca=False.

custom_pipeline: (str, transformer), list of (str, transformer) or dict, default = None

Addidiotnal custom transformers. If passed, they are applied to the pipeline last, after all the build-in transformers.

n_jobs: int, default = -1

The number of jobs to run in parallel (for functions that supports parallel processing) -1 means using all processors. To run all functions on single processor set n_jobs to None.

use_gpu: bool or str, default = False

When set to True, it will use GPU for training with algorithms that support it, and fall back to CPU if they are unavailable. When set to ‘force’, it will only use GPU-enabled algorithms and raise exceptions when they are unavailable. When False, all algorithms are trained using CPU only.

GPU enabled algorithms:

  • None at this moment.

html: bool, default = True

When set to False, prevents runtime display of monitor. This must be set to False when the environment does not support IPython. For example, command line terminal, Databricks Notebook, Spyder and other similar IDEs.

session_id: int, default = None

Controls the randomness of experiment. It is equivalent to ‘random_state’ in scikit-learn. When None, a pseudo random number is generated. This can be used for later reproducibility of the entire experiment.

system_log: bool or logging.Logger, default = True

Whether to save the system logging file (as logs.log). If the input already is a logger object, that one is used instead.

log_experiment: bool, default = False

When set to True, all metrics and parameters are logged on the MLFlow server.

experiment_name: str, default = None

Name of the experiment for logging. Ignored when log_experiment is not True.

experiment_custom_tags: dict or None, default = None

Dictionary of tag_name: String -> value: (String, but will be string-ified if not) passed to the mlflow.set_tags to add new custom tags for the experiment.

log_plots: bool or list, default = False

When set to True, certain plots are logged automatically in the MLFlow server. To change the type of plots to be logged, pass a list containing plot IDs. Refer to documentation of plot_model. Ignored when log_experiment is not True.

log_profile: bool, default = False

When set to True, data profile is logged on the MLflow server as a html file. Ignored when log_experiment is not True.

log_data: bool, default = False

When set to True, dataset is logged on the MLflow server as a csv file. Ignored when log_experiment is not True.

silent: bool, default = False

Controls the confirmation input of data types when setup is executed. When executing in completely automated mode or on a remote kernel, this must be True.

verbose: bool, default = True

When set to False, Information grid is not printed.

memory: str, bool or Memory, default=True
Used to cache the fitted transformers of the pipeline.

If False: No caching is performed. If True: A default temp directory is used. If str: Path to the caching directory.

profile: bool, default = False

When set to True, an interactive EDA report is displayed.

profile_kwargs: dict, default = {} (empty dict)

Dictionary of arguments passed to the ProfileReport method used to create the EDA report. Ignored if profile is False.

Returns

Global variables that can be changed using the set_config function.

pycaret.anomaly.create_model(model: Union[str, Any], fraction: float = 0.05, verbose: bool = True, fit_kwargs: Optional[dict] = None, experiment_custom_tags: Optional[Dict[str, Any]] = None, **kwargs)

This function trains a given model from the model library. All available models can be accessed using the models function.

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
>>> knn = create_model('knn')
model: str or scikit-learn compatible object

ID of an model available in the model library or pass an untrained model object consistent with scikit-learn API. Estimators available in the model library (ID - Name):

  • ‘abod’ - Angle-base Outlier Detection

  • ‘cluster’ - Clustering-Based Local Outlier

  • ‘cof’ - Connectivity-Based Outlier Factor

  • ‘histogram’ - Histogram-based Outlier Detection

  • ‘knn’ - k-Nearest Neighbors Detector

  • ‘lof’ - Local Outlier Factor

  • ‘svm’ - One-class SVM detector

  • ‘pca’ - Principal Component Analysis

  • ‘mcd’ - Minimum Covariance Determinant

  • ‘sod’ - Subspace Outlier Detection

  • ‘sos’ - Stochastic Outlier Selection

fraction: float, default = 0.05

The amount of contamination of the data set, i.e. the proportion of outliers in the data set. Used when fitting to define the threshold on the decision function.

verbose: bool, default = True

Status update is not printed when verbose is set to False.

experiment_custom_tags: dict, default = None

Dictionary of tag_name: String -> value: (String, but will be string-ified if not) passed to the mlflow.set_tags to add new custom tags for the experiment.

fit_kwargs: dict, default = {} (empty dict)

Dictionary of arguments passed to the fit method of the model.

**kwargs:

Additional keyword arguments to pass to the estimator.

Returns

Trained Model

pycaret.anomaly.assign_model(model, transformation: bool = False, score: bool = True, verbose: bool = True) → pandas.core.frame.DataFrame

This function assigns anomaly labels to the dataset for a given model. (1 = outlier, 0 = inlier).

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
>>> knn = create_model('knn')
>>> knn_df = assign_model(knn)
model: scikit-learn compatible object

Trained model object

transformation: bool, default = False

Whether to apply anomaly labels on the transformed dataset.

score: bool, default = True

Whether to show outlier score or not.

verbose: bool, default = True

Status update is not printed when verbose is set to False.

Returns

pandas.DataFrame

pycaret.anomaly.tune_model(model, supervised_target: str, supervised_type: Optional[str] = None, supervised_estimator: Union[str, Any] = 'lr', method: str = 'drop', optimize: Optional[str] = None, custom_grid: Optional[List[int]] = None, fold: int = 10, fit_kwargs: Optional[dict] = None, groups: Optional[Union[str, Any]] = None, round: int = 4, verbose: bool = True)

This function tunes the fraction parameter of a given model.

Example

>>> from pycaret.datasets import get_data
>>> juice = get_data('juice')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = juice)
>>> tuned_knn = tune_model(model = 'knn', supervised_target = 'Purchase')
model: str

ID of an model available in the model library. Models that can be tuned in this function (ID - Model):

  • ‘abod’ - Angle-base Outlier Detection

  • ‘cluster’ - Clustering-Based Local Outlier

  • ‘cof’ - Connectivity-Based Outlier Factor

  • ‘histogram’ - Histogram-based Outlier Detection

  • ‘knn’ - k-Nearest Neighbors Detector

  • ‘lof’ - Local Outlier Factor

  • ‘svm’ - One-class SVM detector

  • ‘pca’ - Principal Component Analysis

  • ‘mcd’ - Minimum Covariance Determinant

  • ‘sod’ - Subspace Outlier Detection

  • ‘sos’ - Stochastic Outlier Selection

supervised_target: str

Name of the target column containing labels.

supervised_type: str, default = None

Type of task. ‘classification’ or ‘regression’. Automatically inferred when None.

supervised_estimator: str, default = None
Classification (ID - Name):

  • ‘lr’ - Logistic Regression (Default)

  • ‘knn’ - K Nearest Neighbour

  • ‘nb’ - Naive Bayes

  • ‘dt’ - Decision Tree Classifier

  • ‘svm’ - SVM - Linear Kernel

  • ‘rbfsvm’ - SVM - Radial Kernel

  • ‘gpc’ - Gaussian Process Classifier

  • ‘mlp’ - Multi Level Perceptron

  • ‘ridge’ - Ridge Classifier

  • ‘rf’ - Random Forest Classifier

  • ‘qda’ - Quadratic Discriminant Analysis

  • ‘ada’ - Ada Boost Classifier

  • ‘gbc’ - Gradient Boosting Classifier

  • ‘lda’ - Linear Discriminant Analysis

  • ‘et’ - Extra Trees Classifier

  • ‘xgboost’ - Extreme Gradient Boosting

  • ‘lightgbm’ - Light Gradient Boosting

  • ‘catboost’ - CatBoost Classifier

Regression (ID - Name):

  • ‘lr’ - Linear Regression (Default)

  • ‘lasso’ - Lasso Regression

  • ‘ridge’ - Ridge Regression

  • ‘en’ - Elastic Net

  • ‘lar’ - Least Angle Regression

  • ‘llar’ - Lasso Least Angle Regression

  • ‘omp’ - Orthogonal Matching Pursuit

  • ‘br’ - Bayesian Ridge

  • ‘ard’ - Automatic Relevance Determ.

  • ‘par’ - Passive Aggressive Regressor

  • ‘ransac’ - Random Sample Consensus

  • ‘tr’ - TheilSen Regressor

  • ‘huber’ - Huber Regressor

  • ‘kr’ - Kernel Ridge

  • ‘svm’ - Support Vector Machine

  • ‘knn’ - K Neighbors Regressor

  • ‘dt’ - Decision Tree

  • ‘rf’ - Random Forest

  • ‘et’ - Extra Trees Regressor

  • ‘ada’ - AdaBoost Regressor

  • ‘gbr’ - Gradient Boosting

  • ‘mlp’ - Multi Level Perceptron

  • ‘xgboost’ - Extreme Gradient Boosting

  • ‘lightgbm’ - Light Gradient Boosting

  • ‘catboost’ - CatBoost Regressor

method: str, default = ‘drop’

When method set to drop, it will drop the outliers from training dataset. When ‘surrogate’, it uses decision function and label as a feature during training.

optimize: str, default = None
For Classification tasks:

Accuracy, AUC, Recall, Precision, F1, Kappa (default = ‘Accuracy’)

For Regression tasks:

MAE, MSE, RMSE, R2, RMSLE, MAPE (default = ‘R2’)

custom_grid: list, default = None

By default, a pre-defined list of fraction values is iterated over to optimize the supervised objective. To overwrite default iteration, pass a list of fraction value to iterate over in custom_grid param.

fold: int, default = 10

Number of folds to be used in Kfold CV. Must be at least 2.

verbose: bool, default = True

Status update is not printed when verbose is set to False.

Returns

Trained Model with optimized fraction parameter.

pycaret.anomaly.plot_model(model, plot: str = 'tsne', feature: Optional[str] = None, label: bool = False, scale: float = 1, save: bool = False, display_format: Optional[str] = None)

This function analyzes the performance of a trained model.

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
>>> knn = create_model('knn')
>>> plot_model(knn, plot = 'tsne')
model: scikit-learn compatible object

Trained Model Object

plot: str, default = ‘tsne’

List of available plots (ID - Name):

  • ‘tsne’ - t-SNE (3d) Dimension Plot

  • ‘umap’ - UMAP Dimensionality Plot

feature: str, default = None

Feature to be used as a hoverover tooltip and/or label when the label param is set to True. When feature is None, first column of the dataset is used.

label: bool, default = False

Name of column to be used as data labels.

scale: float, default = 1

The resolution scale of the figure.

save: bool, default = False

When set to True, plot is saved in the current working directory.

display_format: str, default = None

To display plots in Streamlit (https://www.streamlit.io/), set this to ‘streamlit’. Currently, not all plots are supported.

Returns

None

pycaret.anomaly.evaluate_model(model, feature: Optional[str] = None, fit_kwargs: Optional[dict] = None)

This function displays a user interface for analyzing performance of a trained model. It calls the plot_model function internally.

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
>>> knn = create_model('knn')
>>> evaluate_model(knn)
model: scikit-learn compatible object

Trained model object

feature: str, default = None

Feature to be used as a hoverover tooltip and/or label when the label param is set to True. When feature is None, first column of the dataset is used by default.

fit_kwargs: dict, default = {} (empty dict)

Dictionary of arguments passed to the fit method of the model.

Returns

None

Warning

  • This function only works in IPython enabled Notebook.

pycaret.anomaly.predict_model(model, data: pandas.core.frame.DataFrame) → pandas.core.frame.DataFrame

This function generates anomaly labels on using a trained model.

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
>>> knn = create_model('knn')
>>> knn_predictions = predict_model(model = knn, data = unseen_data)
model: scikit-learn compatible object

Trained Model Object.

datapandas.DataFrame

Shape (n_samples, n_features) where n_samples is the number of samples and n_features is the number of features.

Returns

pandas.DataFrame

Warning

  • The behavior of the predict_model is changed in version 2.1 without backward compatibility. As such, the pipelines trained using the version (<= 2.0), may not work for inference with version >= 2.1. You can either retrain your models with a newer version or downgrade the version for inference.

pycaret.anomaly.deploy_model(model, model_name: str, authentication: dict, platform: str = 'aws')

This function deploys the transformation pipeline and trained model on cloud.

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
>>> knn = create_model('knn')
>>> # sets appropriate credentials for the platform as environment variables
>>> import os
>>> os.environ["AWS_ACCESS_KEY_ID"] = str("foo")
>>> os.environ["AWS_SECRET_ACCESS_KEY"] = str("bar")
>>> deploy_model(model = knn, model_name = 'knn-for-deployment', platform = 'aws', authentication = {'bucket' : 'S3-bucket-name'})
Amazon Web Service (AWS) users:

To deploy a model on AWS S3 (‘aws’), the credentials have to be passed. The easiest way is to use environment variables in your local environment. Following information from the IAM portal of amazon console account are required:

  • AWS Access Key ID

  • AWS Secret Key Access

More info: https://boto3.amazonaws.com/v1/documentation/api/latest/guide/credentials.html#environment-variables

Google Cloud Platform (GCP) users:

To deploy a model on Google Cloud Platform (‘gcp’), project must be created using command line or GCP console. Once project is created, you must create a service account and download the service account key as a JSON file to set environment variables in your local environment.

More info: https://cloud.google.com/docs/authentication/production

Microsoft Azure (Azure) users:

To deploy a model on Microsoft Azure (‘azure’), environment variables for connection string must be set in your local environment. Go to settings of storage account on Azure portal to access the connection string required.

  • AZURE_STORAGE_CONNECTION_STRING (required as environment variable)

More info: https://docs.microsoft.com/en-us/azure/storage/blobs/storage-quickstart-blobs-python?toc=%2Fpython%2Fazure%2FTOC.json

model: scikit-learn compatible object

Trained model object

model_name: str

Name of model.

authentication: dict

Dictionary of applicable authentication tokens.

When platform = ‘aws’: {‘bucket’ : ‘S3-bucket-name’, ‘path’: (optional) folder name under the bucket}

When platform = ‘gcp’: {‘project’: ‘gcp-project-name’, ‘bucket’ : ‘gcp-bucket-name’}

When platform = ‘azure’: {‘container’: ‘azure-container-name’}

platform: str, default = ‘aws’

Name of the platform. Currently supported platforms: ‘aws’, ‘gcp’ and ‘azure’.

Returns

None

pycaret.anomaly.save_model(model, model_name: str, model_only: bool = False, verbose: bool = True, **kwargs)

This function saves the transformation pipeline and trained model object into the current working directory as a pickle file for later use.

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
>>> knn = create_model('knn')
>>> save_model(knn, 'saved_knn_model')
model: scikit-learn compatible object

Trained model object

model_name: str

Name of the model.

model_only: bool, default = False

When set to True, only trained model object is saved instead of the entire pipeline.

verbose: bool, default = True

Success message is not printed when verbose is set to False.

**kwargs:

Additional keyword arguments to pass to joblib.dump().

Returns

Tuple of the model object and the filename.

pycaret.anomaly.load_model(model_name, platform: Optional[str] = None, authentication: Optional[Dict[str, str]] = None, verbose: bool = True)

This function loads a previously saved pipeline.

Example

>>> from pycaret.anomaly import load_model
>>> saved_knn = load_model('saved_knn_model')
model_name: str

Name of the model.

platform: str, default = None

Name of the cloud platform. Currently supported platforms: ‘aws’, ‘gcp’ and ‘azure’.

authentication: dict, default = None

dictionary of applicable authentication tokens.

when platform = ‘aws’: {‘bucket’ : ‘Name of Bucket on S3’, ‘path’: (optional) folder name under the bucket}

when platform = ‘gcp’: {‘project’: ‘gcp-project-name’, ‘bucket’ : ‘gcp-bucket-name’}

when platform = ‘azure’: {‘container’: ‘azure-container-name’}

verbose: bool, default = True

Success message is not printed when verbose is set to False.

Returns

Trained Model

pycaret.anomaly.models(internal: bool = False, raise_errors: bool = True) → pandas.core.frame.DataFrame

Returns table of models available in the model library.

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
>>> all_models = models()
internal: bool, default = False

If True, will return extra columns and rows used internally.

raise_errors: bool, default = True

If False, will suppress all exceptions, ignoring models that couldn’t be created.

Returns

pandas.DataFrame

pycaret.anomaly.get_logs(experiment_name: Optional[str] = None, save: bool = False) → pandas.core.frame.DataFrame

Returns a table of experiment logs. Only works when log_experiment is True when initializing the setup function.

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly,  log_experiment = True)
>>> knn = create_model('knn')
>>> exp_logs = get_logs()
experiment_name: str, default = None

When None current active run is used.

save: bool, default = False

When set to True, csv file is saved in current working directory.

Returns

pandas.DataFrame

pycaret.anomaly.get_config(variable: str)

This function retrieves the global variables created when initializing the setup function. Following variables are accessible:

  • dataset: Transformed dataset

  • train: Transformed training set

  • test: Transformed test set

  • X: Transformed feature set

  • y: Transformed target column

  • X_train, X_test, y_train, y_test: Subsets of the train and test sets.

  • seed: random state set through session_id

  • pipeline: Transformation pipeline configured through setup

  • n_jobs_param: n_jobs parameter used in model training

  • html_param: html_param configured through setup

  • master_model_container: model storage container

  • display_container: results display container

  • exp_name_log: Name of experiment set through setup

  • logging_param: log_experiment param set through setup

  • log_plots_param: log_plots param set through setup

  • USI: Unique session ID parameter set through setup

  • gpu_param: use_gpu param configured through setup

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
>>> X = get_config('X')
Returns

Global variable

pycaret.anomaly.set_config(variable: str, value)

This function resets the global variables. Following variables are accessible:

  • X: Transformed dataset (X)

  • data_before_preprocess: data before preprocessing

  • seed: random state set through session_id

  • prep_pipe: Transformation pipeline configured through setup

  • n_jobs_param: n_jobs parameter used in model training

  • html_param: html_param configured through setup

  • master_model_container: model storage container

  • display_container: results display container

  • exp_name_log: Name of experiment set through setup

  • logging_param: log_experiment param set through setup

  • log_plots_param: log_plots param set through setup

  • USI: Unique session ID parameter set through setup

  • gpu_param: use_gpu param configured through setup

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
>>> set_config('seed', 123)
Returns

None

pycaret.anomaly.save_config(file_name: str)

This function save all global variables to a pickle file, allowing to later resume without rerunning the setup.

Example

>>> from pycaret.datasets import get_data
>>> anomaly = get_data('anomaly')
>>> from pycaret.anomaly import *
>>> exp_name = setup(data = anomaly)
>>> save_config('myvars.pkl')
Returns

None

pycaret.anomaly.load_config(file_name: str)

This function loads global variables from a pickle file into Python environment.

Example

>>> from pycaret.anomaly import load_config
>>> load_config('myvars.pkl')
Returns

Global variables

pycaret.anomaly.get_outliers(data, model: Union[str, Any] = 'knn', fraction: float = 0.05, fit_kwargs: Optional[dict] = None, preprocess: bool = True, imputation_type: str = 'simple', iterative_imputation_iters: int = 5, categorical_features: Optional[List[str]] = None, categorical_imputation: str = 'mode', categorical_iterative_imputer: Union[str, Any] = 'lightgbm', ordinal_features: Optional[Dict[str, list]] = None, high_cardinality_features: Optional[List[str]] = None, high_cardinality_method: str = 'frequency', numeric_features: Optional[List[str]] = None, numeric_imputation: str = 'mean', numeric_iterative_imputer: Union[str, Any] = 'lightgbm', date_features: Optional[List[str]] = None, ignore_features: Optional[List[str]] = None, normalize: bool = False, normalize_method: str = 'zscore', transformation: bool = False, transformation_method: str = 'yeo-johnson', handle_unknown_categorical: bool = True, unknown_categorical_method: str = 'least_frequent', pca: bool = False, pca_method: str = 'linear', pca_components: Union[int, float] = 1.0, low_variance_threshold: float = 0, combine_rare_levels: bool = False, rare_level_threshold: float = 0.1, bin_numeric_features: Optional[List[str]] = None, remove_multicollinearity: bool = False, multicollinearity_threshold: float = 0.9, remove_perfect_collinearity: bool = False, group_features: Optional[List[str]] = None, group_names: Optional[List[str]] = None, n_jobs: Optional[int] = - 1, session_id: Optional[int] = None, system_log: Union[bool, logging.Logger] = True, log_experiment: bool = False, experiment_name: Optional[str] = None, log_plots: Union[bool, list] = False, log_profile: bool = False, log_data: bool = False, profile: bool = False, **kwargs) → pandas.core.frame.DataFrame

Callable from any external environment without requiring setup initialization.