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Description:
azureaianomalydetector 3.0.0b6
Cognitive Services Anomaly Detector client library for Python
Anomaly Detector is an AI service with a set of APIs, which enables you to monitor and detect anomalies in your time series data with little machine learning (ML) knowledge, either batch validation or real-time inference.
Getting started
Prerequisites
Python 3.7 or later is required to use this package.
You need an Azure subscription to use this package.
An existing Cognitive Services Anomaly Detector instance.
Install the package
python -m pip install azure-ai-anomalydetector
Note: This version of the client library defaults to the 3.0.0b6 version of the service.
This table shows the relationship between SDK versions and supported API versions of the service:
SDK version
Supported API version of service
3.0.0b6
1.1
3.0.0b4, 3.0.0b5
1.1-preview-1
3.0.0b3
1.1-preview
3.0.0b1, 3.0.0b2
1.0
Authenticate the client
Get the endpoint
You can find the endpoint for your Anomaly Detector service resource using the
Azure Portal
or Azure CLI:
# Get the endpoint for the Anomaly Detector service resource
az cognitiveservices account show --name "resource-name" --resource-group "resource-group-name" --query "properties.endpoint"
Get the API Key
You can get the API Key from the Anomaly Detector service resource in the Azure Portal.
Alternatively, you can use Azure CLI snippet below to get the API key of your resource.
az cognitiveservices account keys list --resource-group <your-resource-group-name> --name <your-resource-name>
Create a AnomalyDetectorClient with an API Key Credential
Once you have the value for the API key, you can pass it as a string into an instance of AzureKeyCredential. Use the key as the credential parameter
to authenticate the client:
from azure.core.credentials import AzureKeyCredential
from azure.ai.anomalydetector import AnomalyDetectorClient
credential = AzureKeyCredential("<api_key>")
client = AnomalyDetectorClient(endpoint="https://<resource-name>.cognitiveservices.azure.com/", credential=credential)
Key concepts
With the Anomaly Detector, you can either detect anomalies in one variable using Univariate Anomaly Detection, or detect anomalies in multiple variables with Multivariate Anomaly Detection.
Feature
Description
Univariate Anomaly Detection
Detect anomalies in one variable, like revenue, cost, etc. The model was selected automatically based on your data pattern.
Multivariate Anomaly Detection
Detect anomalies in multiple variables with correlations, which are usually gathered from equipment or other complex system. The underlying model used is Graph attention network.
Univariate Anomaly Detection
The Univariate Anomaly Detection API enables you to monitor and detect abnormalities in your time series data without having to know machine learning. The algorithms adapt by automatically identifying and applying the best-fitting models to your data, regardless of industry, scenario, or data volume. Using your time series data, the API determines boundaries for anomaly detection, expected values, and which data points are anomalies.
Using the Anomaly Detector doesn't require any prior experience in machine learning, and the REST API enables you to easily integrate the service into your applications and processes.
With the Univariate Anomaly Detection, you can automatically detect anomalies throughout your time series data, or as they occur in real-time.
Feature
Description
Streaming detection
Detect anomalies in your streaming data by using previously seen data points to determine if your latest one is an anomaly. This operation generates a model using the data points you send, and determines if the target point is an anomaly. By calling the API with each new data point you generate, you can monitor your data as it's created.
Batch detection
Use your time series to detect any anomalies that might exist throughout your data. This operation generates a model using your entire time series data, with each point analyzed with the same model.
Change points detection
Use your time series to detect any trend change points that exist in your data. This operation generates a model using your entire time series data, with each point analyzed with the same model.
Multivariate Anomaly Detection
The Multivariate Anomaly Detection APIs further enable developers by easily integrating advanced AI for detecting anomalies from groups of metrics, without the need for machine learning knowledge or labeled data. Dependencies and inter-correlations between up to 300 different signals are now automatically counted as key factors. This new capability helps you to proactively protect your complex systems such as software applications, servers, factory machines, spacecraft, or even your business, from failures.
With the Multivariate Anomaly Detection, you can automatically detect anomalies throughout your time series data, or as they occur in real-time. There are three processes to use Multivariate Anomaly Detection.
Training: Use Train Model API to create and train a model, then use Get Model Status API to get the status and model metadata.
Inference:
Use Async Inference API to trigger an asynchronous inference process and use Get Inference results API to get detection results on a batch of data.
You could also use Sync Inference API to trigger a detection on one timestamp every time.
Other operations: List Model API and Delete Model API are supported in Multivariate Anomaly Detection model for model management.
Thread safety
We guarantee that all client instance methods are thread-safe and independent of each other (guideline). This ensures that the recommendation of reusing client instances is always safe, even across threads.
Examples
The following section provides several code snippets covering some of the most common Anomaly Detector service tasks, including:
Univariate Anomaly Detection - Batch detection
Univariate Anomaly Detection - Streaming detection
Univariate Anomaly Detection - Detect change points
Multivariate Anomaly Detection
Batch detection
from azure.ai.anomalydetector import AnomalyDetectorClient
from azure.core.credentials import AzureKeyCredential
from azure.ai.anomalydetector.models import *
SUBSCRIPTION_KEY = os.environ["ANOMALY_DETECTOR_KEY"]
ANOMALY_DETECTOR_ENDPOINT = os.environ["ANOMALY_DETECTOR_ENDPOINT"]
TIME_SERIES_DATA_PATH = os.path.join("sample_data", "request-data.csv")
client = AnomalyDetectorClient(ANOMALY_DETECTOR_ENDPOINT, AzureKeyCredential(SUBSCRIPTION_KEY))
series = []
data_file = pd.read_csv(TIME_SERIES_DATA_PATH, header=None, encoding="utf-8", parse_dates=[0])
for index, row in data_file.iterrows():
series.append(TimeSeriesPoint(timestamp=row[0], value=row[1]))
request = UnivariateDetectionOptions(
series=series,
granularity=TimeGranularity.DAILY,
)
if any(response.is_anomaly):
print("An anomaly was detected at index:")
for i, value in enumerate(response.is_anomaly):
if value:
print(i)
else:
print("No anomalies were detected in the time series.")
Streaming Detection
from azure.ai.anomalydetector import AnomalyDetectorClient
from azure.core.credentials import AzureKeyCredential
from azure.ai.anomalydetector.models import *
SUBSCRIPTION_KEY = os.environ["ANOMALY_DETECTOR_KEY"]
ANOMALY_DETECTOR_ENDPOINT = os.environ["ANOMALY_DETECTOR_ENDPOINT"]
TIME_SERIES_DATA_PATH = os.path.join("sample_data", "request-data.csv")
client = AnomalyDetectorClient(ANOMALY_DETECTOR_ENDPOINT, AzureKeyCredential(SUBSCRIPTION_KEY))
series = []
data_file = pd.read_csv(TIME_SERIES_DATA_PATH, header=None, encoding="utf-8", parse_dates=[0])
for index, row in data_file.iterrows():
series.append(TimeSeriesPoint(timestamp=row[0], value=row[1]))
request = UnivariateDetectionOptions(
series=series,
granularity=TimeGranularity.DAILY,
)
print("Detecting the anomaly status of the latest data point.")
if response.is_anomaly:
print("The latest point is detected as anomaly.")
else:
print("The latest point is not detected as anomaly.")
Detect change points
from azure.ai.anomalydetector import AnomalyDetectorClient
from azure.core.credentials import AzureKeyCredential
from azure.ai.anomalydetector.models import *
SUBSCRIPTION_KEY = os.environ["ANOMALY_DETECTOR_KEY"]
ANOMALY_DETECTOR_ENDPOINT = os.environ["ANOMALY_DETECTOR_ENDPOINT"]
TIME_SERIES_DATA_PATH = os.path.join("sample_data", "request-data.csv")
client = AnomalyDetectorClient(ANOMALY_DETECTOR_ENDPOINT, AzureKeyCredential(SUBSCRIPTION_KEY))
series = []
data_file = pd.read_csv(TIME_SERIES_DATA_PATH, header=None, encoding="utf-8", parse_dates=[0])
for index, row in data_file.iterrows():
series.append(TimeSeriesPoint(timestamp=row[0], value=row[1]))
request = UnivariateChangePointDetectionOptions(
series=series,
granularity=TimeGranularity.DAILY,
)
if any(response.is_change_point):
print("An change point was detected at index:")
for i, value in enumerate(response.is_change_point):
if value:
print(i)
else:
print("No change point were detected in the time series.")
Multivariate Anomaly Detection Sample
To see how to use Anomaly Detector library to conduct Multivariate Anomaly Detection, see this sample.
To get more details of Anomaly Detector package, refer to this azure.ai.anomalydetector package.
Troubleshooting
General
Anomaly Detector client library will raise exceptions defined in Azure Core.
Logging
This library uses the standard logging library for logging.
Basic information about HTTP sessions (URLs, headers, etc.) is logged at INFO level.
Detailed DEBUG level logging, including request/response bodies and unredacted
headers, can be enabled on the client or per-operation with the logging_enable keyword argument.
See full SDK logging documentation with examples here.
Optional Configuration
Optional keyword arguments can be passed in at the client and per-operation level.
The azure-core reference documentation describes available configurations for retries, logging, transport protocols, and more.
Next steps
These code samples show common scenario operations with the Azure Anomaly Detector library. More samples can be found under the samples directory.
Univariate Anomaly Detection - Batch Detection: sample_detect_entire_series_anomaly.py
Univariate Anomaly Detection - Streaming Detection: sample_detect_last_point_anomaly.py
Univariate Anomaly Detection - Change Point Detection: sample_detect_change_point.py
Multivariate Anomaly Detection: sample_multivariate_detect.py
Additional documentation
For more extensive documentation on Azure Anomaly Detector, see the Anomaly Detector documentation on docs.microsoft.com.
Contributing
This project welcomes contributions and suggestions. Most contributions require
you to agree to a Contributor License Agreement (CLA) declaring that you have
the right to, and actually do, grant us the rights to use your contribution.
For details, visit CLA homepage.
When you submit a pull request, a CLA-bot will automatically determine whether
you need to provide a CLA and decorate the PR appropriately (e.g., label,
comment). Simply follow the instructions provided by the bot. You will only
need to do this once across all repos using our CLA.
This project has adopted the
Microsoft Open Source Code of Conduct. For more information,
see the Code of Conduct FAQ or contact [email protected] with any
additional questions or comments.
License
For personal and professional use. You cannot resell or redistribute these repositories in their original state.
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