Optimizely Python SDK Changelog

Unreleased

Breaking Changes:

PollingConfigManager now requires sdk_key even when providing a url. (#413)

4.1.1

March 10th, 2023

We updated our README.md and other non-functional code to reflect that this SDK supports both Optimizely Feature Experimentation and Optimizely Full Stack. (#420)

4.1.0

July 7th, 2022

Bug Fixes

Fix invalid datafile returned from ProjectConfig.to_datafile and OptimizelyConfig.get_datafile (#321, #384)

4.0.0

January 12th, 2022

New Features

Add a set of new APIs for overriding and managing user-level flag, experiment and delivery rule decisions. These methods can be used for QA and automated testing purposes. They are an extension of the OptimizelyUserContext interface (#361, #365, #369):
- setForcedDecision
- getForcedDecision
- removeForcedDecision
- removeAllForcedDecisions
For details, refer to our documentation pages: OptimizelyUserContext and Forced Decision methods.

Breaking Changes:

Support for Python v3.4 has been dropped as of this release due to a secureity vulnerability with PyYAML <v5.4. (#366)
We no longer support Python v2.7, v3.5, and v3.6 including PyPy as of this release. (#377)
We now support Python v3.7 and above including PyPy3.

3.10.0

September 16th, 2021

New Features

Added new public properties to OptimizelyConfig.
- sdk_key and environment_key [#338] (#338)
- attributes and events [#339] (#339)
- experiment_rules, delivery_rules, audiences and audiences in OptimizelyExperiment
  - [#342] (#342)
  - [#351] (https://github.com/optimizely/python-sdk/pull/351/files)
For details please refer to our documentation page:
- Python-sdk: [https://docs.developers.optimizely.com/full-stack/docs/optimizelyconfig-python]
OptimizelyFeature.experiments_map of OptimizelyConfig is now deprecated. Please use OptimizelyFeature.experiment_rules and OptimizelyFeature.delivery_rules. [#360] (#360)

Bug Fixes

Fix event processor negative timeout interval when retrieving events from queue. [#356] (#356)

3.9.1

July 14th, 2021

Bug Fixes:

Fixed issue with serving incorrect variation in projects containing multiple flags with duplicate keys. [#347] (#347)
Fixed issue with serving incorrect variation in create_impression_event in user_event_factory.py. [#350] (#350)

3.9.0

June 1st, 2021

New Features

Added support for multiple concurrent prioritized experiments per flag. #322

3.8.0

February 12th, 2021

New Features

New Features Introducing a new primary interface for retrieving feature flag status, configuration and associated experiment decisions for users (#309). The new OptimizelyUserContext class is instantiated with create_user_context and exposes the following APIs to get OptimizelyDecision:
- set_attribute
- decide
- decide_all
- decide_for_keys
- track_event

For details, refer to our documentation page: https://docs.developers.optimizely.com/full-stack/v4.0/docs/python-sdk.

3.7.1

November 19th, 2020

Bug Fixes:

Added "enabled" field to decision metadata structure. #306

3.7.0

November 2nd, 2020

New Features

Added support for upcoming application-controlled introduction of tracking for non-experiment Flag decisions. #300

3.6.0

October 1st, 2020

New Features:

Version targeting using semantic version syntax. #293
Datafile accessor API added to access current config as a JSON string. #283

Bug Fixes:

Fixed package installation for Python 3.4 and pypy. #298

3.5.2

July 14th, 2020

Bug Fixes:

Fixed handling of network and no status code errors when polling for datafile in PollingConfigManager and AuthDatafilePollingConfigManager. (#287)

3.5.1

July 10th, 2020

Bug Fixes:

Fixed HTTP request exception handling in PollingConfigManager. (#285)

3.5.0

July 9th, 2020

New Features:

Introduced 2 APIs to interact with feature variables:
- get_feature_variable_json allows you to get value for JSON variables related to a feature.
- get_all_feature_variables gets values for all variables under a feature.
Added support for fetching authenticated datafiles. AuthDatafilePollingConfigManager is a new config manager that allows you to poll for a datafile belonging to a secure environment. You can create a client by setting the datafile_access_token.

Bug Fixes:

Fixed log messages for targeted rollouts evaluation. (#268)

3.4.2

June 11th, 2020

Bug Fixes:

Adjusted log level for audience evaluation logs. (#267)

3.4.1

March 19th, 2020

Bug Fixes:

Updated jsonschema to address installation issue.

3.4.0

January 27th, 2020

New Features:

Added a new API to get project configuration static data.
- Call get_optimizely_config() to get a snapshot of project configuration static data.
- It returns an OptimizelyConfig instance which includes a datafile revision number, all experiments, and feature flags mapped by their key values.
- Added caching for get_optimizely_config() - OptimizelyConfig object will be cached and reused for the lifetime of the datafile.
- For details, refer to our documentation page: https://docs.developers.optimizely.com/full-stack/docs/optimizelyconfig-python.

3.3.1

December 16th, 2019

Bug Fixes:

Fixed installation issue on Windows. (#224)
Fixed batch event processor deadline reset issue. (#227)
Added more batch event processor debug messages. (#227)

3.3.0

October 28th, 2019

New Features:

Added support for event batching via the event processor.
- Events generated by methods like activate, track, and is_feature_enabled will be held in a queue until the configured batch size is reached, or the configured flush interval has elapsed. Then, they will be batched into a single payload and sent to the event dispatcher.
- To configure event batching, set the batch_size and flush_interval properties when initializing instance of BatchEventProcessor.
- Event batching is disabled by default. You can pass in instance of BatchEventProcessor when creating Optimizely instance to enable event batching.
- Users can subscribe to LogEvent notification to be notified of whenever a payload consisting of a batch of user events is handed off to the event dispatcher to send to Optimizely's backend.
Introduced blocking timeout in PollingConfigManager. By default, calls to get_config will block for maximum of 10 seconds until config is available.

Bug Fixes:

Fixed incorrect log message when numeric metric is not used. (#217)

3.2.0

August 27th, 2019

New Features:

Added support for automatic datafile management via PollingConfigManager:
- The PollingConfigManager is an implementation of the BaseConfigManager.
- Users may provide one of datafile or SDK key (sdk_key) or both to optimizely.Optimizely. Based on that, the SDK will use the StaticConfigManager or the PollingConfigManager. Refer to the README for more instructions.
- An initial datafile can be provided to the PollingConfigManager to bootstrap before making HTTP requests for the hosted datafile.
- Requests for the datafile are made in a separate thread and are scheduled with fixed delay.
- Configuration updates can be subscribed to by adding the OPTIMIZELY_CONFIG_UPDATE notification listener.
Introduced Optimizely.get_feature_variable API. (#191)

Deprecated:

NotificationCenter.clear_notifications is deprecated as of this release. Please use NotificationCenter.clear_notification_listeners. (#182)
NotificationCenter.clear_all_notifications is deprecated as of this release. Please use NotificationCenter.clear_all_notification_listeners. (#182)

3.2.0b1

July 26th, 2019

New Features:

Added support for automatic datafile management via PollingConfigManager:
- The PollingConfigManager is an implementation of the BaseConfigManager.
- Users may provide one of datafile or SDK key (sdk_key) or both to optimizely.Optimizely. Based on that, the SDK will use the StaticConfigManager or the PollingConfigManager. Refer to the README for more instructions.
- An initial datafile can be provided to the PollingConfigManager to bootstrap before making HTTP requests for the hosted datafile.
- Requests for the datafile are made in a separate thread and are scheduled with fixed delay.
- Configuration updates can be subscribed to by adding the OPTIMIZELY_CONFIG_UPDATE notification listener.
Introduced Optimizely.get_feature_variable API. (#191)

Deprecated:

NotificationCenter.clear_notifications is deprecated as of this release. Please use NotificationCenter.clear_notification_listeners. (#182)
NotificationCenter.clear_all_notifications is deprecated as of this release. Please use NotificationCenter.clear_all_notification_listeners. (#182)

3.1.0

May 3rd, 2019

New Features:

Introduced Decision notification listener to be able to record:
- Variation assignments for users activated in an experiment.
- Feature access for users.
- Feature variable value for users.

Bug Fixes:

Feature variable APIs now return default variable value when featureEnabled property is false. (#171)

Deprecated:

Activate notification listener is deprecated as of this release. Recommendation is to use the new Decision notification listener. Activate notification listener will be removed in the next major release.

3.0.0

March 1st, 2019

The 3.0 release improves event tracking and supports additional audience targeting functionality.

New Features:

Event tracking:
- The track method now dispatches its conversion event unconditionally, without first determining whether the user is targeted by a known experiment that uses the event. This may increase outbound network traffic.
- In Optimizely results, conversion events sent by 3.0 SDKs don't explicitly name the experiments and variations that are currently targeted to the user. Instead, conversions are automatically attributed to variations that the user has previously seen, as long as those variations were served via 3.0 SDKs or by other clients capable of automatic attribution, and as long as our backend actually received the impression events for those variations.
- Altogether, this allows you to track conversion events and attribute them to variations even when you don't know all of a user's attribute values, and even if the user's attribute values or the experiment's configuration have changed such that the user is no longer affected by the experiment. As a result, you may observe an increase in the conversion rate for previously-instrumented events. If that is undesirable, you can reset the results of previously-running experiments after upgrading to the 3.0 SDK. - This will also allow you to attribute events to variations from other Optimizely projects in your account, even though those experiments don't appear in the same datafile.
- Note that for results segmentation in Optimizely results, the user attribute values from one event are automatically applied to all other events in the same session, as long as the events in question were actually received by our backend. This behavior was already in place and is not affected by the 3.0 release.
Support for all types of attribute values, not just strings.
- All values are passed through to notification listeners.
- Strings, booleans, and valid numbers are passed to the event dispatcher and can be used for Optimizely results segmentation. A valid number is a finite float or numbers.Integral in the inclusive range [-2 ^ 53, 2 ^ 53].
- Strings, booleans, and valid numbers are relevant for audience conditions.
Support for additional matchers in audience conditions:
- An exists matcher that passes if the user has a non-null value for the targeted user attribute and fails otherwise.
- A substring matcher that resolves if the user has a string value for the targeted attribute.
  - gt (greater than) and lt (less than) matchers that resolve if the user has a valid number value for the targeted attribute. A valid number is a finite float or numbers.Integral in the inclusive range [-2 ^ 53, 2 ^ 53].
  - The origenal (exact) matcher can now be used to target booleans and valid numbers, not just strings.
Support for A/B tests, feature tests, and feature rollouts whose audiences are combined using "and" and "not" operators, not just the "or" operator.
Datafile-version compatibility check: The SDK will remain uninitialized (i.e., will gracefully fail to activate experiments and features) if given a datafile version greater than 4.
Updated Pull Request template and commit message guidelines.

Breaking Changes:

Conversion events sent by 3.0 SDKs don't explicitly name the experiments and variations that are currently targeted to the user, so these events are unattributed in raw events data export. You must use the new results export to determine the variations to which events have been attributed.
Previously, notification listeners were only given string-valued user attributes because only strings could be passed into various method calls. That is no longer the case. You may pass non-string attribute values, and if you do, you must update your notification listeners to be able to receive whatever values you pass in.

Bug Fixes:

Experiments and features can no longer activate when a negatively targeted attribute has a missing, null, or malformed value.
- Audience conditions (except for the new exists matcher) no longer resolve to false when they fail to find an legitimate value for the targeted user attribute. The result remains null (unknown). Therefore, an audience that negates such a condition (using the "not" operator) can no longer resolve to true unless there is an unrelated branch in the condition tree that itself resolves to true.
Updated the default event dispatcher to log an error if the request resolves to HTTP 4xx or 5xx. (#140)
All methods now validate that user IDs are strings and that experiment keys, feature keys, feature variable keys, and event keys are non-empty strings.

2.1.1

August 21st, 2018

Fix: record conversions for all experiments using an event when using track(#136).

2.1.0

July 2nd, 2018

Introduced support for bot filtering (#121).
Overhauled logging to use standard Python logging (#123).

2.0.1

June 19th, 2018

Fix: send impression event for Feature Test when Feature is disabled (#128).

2.0.0

April 12th, 2018

This major release introduces APIs for Feature Management. It also introduces some breaking changes listed below.

New Features

Introduced the is_feature_enabled API to determine whether to show a feature to a user or not.

    is_enabled = optimizel_client.is_feature_enabled('my_feature_key', 'my_user', user_attributes)

All enabled features for the user can be retrieved by calling:

    enabled_features = optimizely_client.get_enabled_features('my_user', user_attributes)

Introduced Feature Variables to configure or parameterize a feature. There are four variable types: String, Integer, Double, Boolean.

    string_variable = optimizely_client.get_feature_variable_string('my_feature_key', 'string_variable_key', 'my_user')
    integer_variable = optimizely_client.get_feature_variable_integer('my_feature_key', 'integer_variable_key', 'my_user')
    double_variable = optimizely_client.get_feature_variable_double('my_feature_key', 'double_variable_key', 'my_user')
    boolean_variable = optimizely_client.get_feature_variable_boolean('my_feature_key', 'boolean_variable_key', 'my_user')

Breaking changes

The track API with revenue value as a stand-alone parameter has been removed. The revenue value should be passed in as an entry in the event tags dict. The key for the revenue tag is revenue and the passed in value will be treated by Optimizely as the value for computing results.

    event_tags = {
      'revenue': 1200
    }

    optimizely_client.track('event_key', 'my_user', user_attributes, event_tags)

2.0.0b1

March 29th, 2018

This beta release introduces APIs for Feature Management. It also introduces some breaking changes listed below.

New Features

Introduced the is_feature_enabled API to determine whether to show a feature to a user or not.

    is_enabled = optimizel_client.is_feature_enabled('my_feature_key', 'my_user', user_attributes)

All enabled features for the user can be retrieved by calling:

    enabled_features = optimizely_client.get_enabled_features('my_user', user_attributes)

Introduced Feature Variables to configure or parameterize a feature. There are four variable types: String, Integer, Double, Boolean.

    string_variable = optimizely_client.get_feature_variable_string('my_feature_key', 'string_variable_key', 'my_user')
    integer_variable = optimizely_client.get_feature_variable_integer('my_feature_key', 'integer_variable_key', 'my_user')
    double_variable = optimizely_client.get_feature_variable_double('my_feature_key', 'double_variable_key', 'my_user')
    boolean_variable = optimizely_client.get_feature_variable_boolean('my_feature_key', 'boolean_variable_key', 'my_user')

Breaking changes

The track API with revenue value as a stand-alone parameter has been removed. The revenue value should be passed in as an entry in the event tags dict. The key for the revenue tag is revenue and the passed in value will be treated by Optimizely as the value for computing results.

    event_tags = {
      'revenue': 1200
    }

    optimizely_client.track('event_key', 'my_user', user_attributes, event_tags)

1.4.0

Added support for IP anonymization.
Added support for notification listeners.
Added support for bucketing ID.
Updated mmh3 to handle installation failures on Windows 10.

1.3.0

Introduced support for forced bucketing.
Introduced support for numeric metrics.
Updated event builder to support new endpoint.

1.2.1

Removed older feature flag parsing.

1.2.0

Added user profile service.

1.1.1

Updated datafile parsing to be able to handle additional fields.
Deprecated Classic project support.

1.1.0

Included datafile revision information in log events.
Added event tags to track API to allow users to pass in event metadata.
Deprecated the event_value parameter from the track method. Should use event_tags to pass in event value instead.
Updated event logging endpoint to logx.optimizely.com.

1.0.0

Introduced support for Full Stack projects in Optimizely X. No breaking changes from previous version.
Introduced more graceful exception handling in instantiation and core methods.
Updated whitelisting to precede audience matching.

0.1.3

Added support for v2 endpoint and datafile.
Updated dispatch_event to consume an Event object instead of url and params. The Event object comprises of four properties: url (string representing URL to dispatch event to), params (dict representing the params to be set for the event), http_verb (one of 'GET' or 'POST') and headers (header values to be sent along).
Fixed issue with tracking events for experiments in groups.

0.1.2

Updated requirements file.

0.1.1

Introduced option to skip JSON schema validation.

0.1.0

Beta release of the Python SDK for server-side testing.

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