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D2LValence utility library for Python.

Project Description
Desire2Learn Utility Library for Python

This utility library divides functionality into a pair of modules:

**Data**. The :py:mod:`` module provides classes to encapsulate
the JSON data structures passed back and forth through the Valence APIs. All the
classes inherit from a :py:class:`D2LStructure generic base class

Note that currently we drive additions to the `data` module by the needs of our
samples and ongoing testing: it does not cover all the structures present in the
Valence API.

**Service**. The :py:mod:`d2lvalence-util.service` module contains a suite of helper
functions you can use to make Valence API calls and partially digest the data
results passed back. In general, the data passed back by a service function is
either a pre-defined class inheriting from :py:class:`D2LStructure
<>`, or one or more dictionaries formed from the
retrieved JSON data.

You can find the
`latest build <>`_
of the utils library on our repository download page.

**Dependencies**. In order to use the Python client utils package, you'll need to
first ensure you have a working Python development environment:

* Python 3 (the reference environment uses Python 3.3).

* The `D2LValence client SDK <>`_.

* The `Requests Python package <>`_
gets used in our :py:mod:`service <d2lvalence-util.service>` module to make the
calls through to the back-end service, and in our :py:mod:`auth <d2lvalence.auth>`
module so that you can use a calling user context object as an authentication
helper for Requests.

* The `Bottle Python package <>`_ if you want to
use the samples available in conjunction with this client library (not a
dependency for the client library itself).

.. :changelog:


* Split out d2lvalence.auth into d2lvalence package, and repackage data and
service modules into d2lvalence-util package.

0.1.15 (2013-05-22)
* added structures and routes for support user activation

* repair news item attachment upload (in create_news_item_for_orgunit) to avoid
tacking on extra CR-LF pairs to file data

* broad change to the way dictionaries of control values get passed down from
the `service` into the requests library, for two reasons: to attempt to
simplify the code around setting them, and to attempt to better avoid stomping
values passed down from higher calling layers

* provide a `data.D2LDebugInfo` to act as a carrier for the actual
request/response object used in the bowels of a service function call: passing
down a `D2LDebugInfo` in a `d2ldebug` keyword argument captures a ref of the
request/response used so that you can inspect it after making the service call
(for examining outgoing URL/headers, full response headers/body/reason, etc)

* factor `Response.raise_for_status()` call into the `_fetch_content()` private
service method to put it in one place, and to allow us the opportunity to
gather the response object into a provided `D2LDebugInfo` before possibly
raising the exception for a failed call

* added `with_traceback()` to the various exceptions service libarary raises for
more provided trace info on exceptions

* added more type checking around parameters passed into service functions that
are expected to be D2LValence data classes

* repaired post to create a discussion post to account for being able to send
one or more file attachments along with the new post; added
`data.D2LDiscussionPostAttachment` child of `data.D2LFile` to handle
discussion post attachments

* repaired `service.check_versions()` to consume an array of
SupportedVersionRequest objects

* fixed bug in `data.CreateCourseOffering.fashion_CreateCourseOffering` factory
function to set `Path` property for the new instance

* added service function to retrieve a raw news item attachment for a news item
in an org unit

* added structures and routes to support ePortfolio package export and import

0.1.14 (2013-04-29)
* repaired D2LUserContext so that it (a) handles API routes that contain
characters that would URL-escaped in both it's AuthBase implementation *and*
its :func:`create_authenticated_url` method, and (b) does this handling in the
same way that does D2L authentication on other language platforms.

0.1.13 (2013-04-17)
* enhanced `service` functions to allow for passing keyword args down into the
requests library making the outgoing HTTP calls

* explicitly added 'application/json' content type header to service actions
sending JSON to the service

* modified multipart/mixed upload functions in `service` module to cope with
changes in requests v1.2.0 around setting the Content-Type header for the
upload action: now the functions use sessions around a prepped-request object,
consistent with requests library new pattern for messing with the headers/body
of an HTTP request

* added `data.D2LNewsAttachment` child of `data.D2LFile` to handle adding
attachments to news events; added `data.NewsItemData` structure to support
creation of news events; added new routes to support more news actions

* added `data.CreateEnrollmentData` structure to handle structure sent during
enrollment creation; added service routes around user enrollment (delete,

* added `data.GroupCategoryDataFetch` and service methods to support some group
routes; added routes around group org units

* added `data.GradeObjectCreateData` and re-factored `data.GradeObject`, as well
as the derived grade object type classes, to separate structures for fetching
and creating grade objects; added `data.GradeObjectCategory` and
`data.GradeObjectCategoryData` to support grade object category routes; added
service routes around grade objects, grade categories, grade values

* added factory methods to the incoming-grade-value structures for easier
creation; added `data.IncomingFinalAdjustedGradeValue` structure for updating
final adjusted grade value

* added data structures and routes around course completion

* added routes around calendar events

* fixed `service.get_organization_info` to return an Organization JSON
structure, and not raw request content.

* fixed `service.get_all_my_grade_values_for_org` to return grade value
instances, instead of grade object instances

0.1.12 (2013-01-23)
* fixed bug in D2LUserContext's implementation as a requests.auth.AuthBase so
that it more properly handles API routes that contain characters that would be
URL escaped by the requests library

0.1.11 (2013-01-04)
* revised `auth.D2LAppContext.create_url_for_authentication` to include an
`encrypt_request` parameter (true by default) to allow generation of
for-authentication URLs that do not use HTTPS

* added `data.D2LDropboxSubsmission` and several service functions to fill out
support for the dropbox routes

* fixed parm name in get dropbox folder route

* fixed the `ExternalEmail` properties for `data.CreateUserData` and
`data.UpdateUserData` to provide better support for having `None` values
(which will translate to `null` when serialized to JSON)

* added `service.update_user()` for updating user records

* fixed the `RoleId` property for `data.CreateUserData` to have an empty default
value rather than a numeric default (which probably isn't a useful default for

* added `data.UserPasswordData` and service methods to support the user password
routes (deleting, changing, resetting)

* added `data.Organization` and `data.OrgUnit` and service methods to support
routes that query the org structure

* added `data.EnrollmentData` and service functions to fill out support for
enrollment routes

* added `data.IncomingGradeValue` and its derived classes, and service functions
to fill out support for grades routes

* added `data.NewsItem` and several service functions to fill out support for
the news routes

* added support to `service` module to try and support pre-1.0.0 requests
package as well as post-1.0.0 versions.

0.1.10 (2012-12-18)
* revised `data` and `service` modules to update for compatibility with requests
package post version 1.0.0

0.1.9 (2012-10-15)
* added data and service functions for Learning Repostory routes

* added data and service functions for course offering and content routes

* added data and service functions for discussion forum routes
* renamed utility functions in `data` module used for property set/getting to
suggest they should be internal and not directly used

* added default (empty) value for `DescriptorDict` property to the
`data.D2LLockerFile` class

* added `files` named parameter to post and put utility methods for simple file

* fix `service.rename_group_locker_folder()` to properly form route

* cleanup service module to python-ify parameter names

0.1.8 (2012-08-30)
* added support to the `auth` module for building an anonymous user context
(context with no user ID/Key pair) -- clients can use such a context to make
calls to the various API Property/Version routes to query LMS for API versions

* moved auth to use direct `==` comparison to check for empty parameters instead
of use `in (singleItemList,)` pattern

* factored out process of fetching contents of Requests objects into a single
funtion, moved to examine `request.headers['content.type']` to determine how
to handle contents rather than just `try` to fetch r.JSON and default to

* repaired `service.check_versions()` to pass the `supported_version_request_array`
as json data

* fixed `service._simple_upload()` to seek underlying buffer stream to head
position before and after read, instead of trying to seek on the byte-string
we read the stream into

* added support to the `service` library for distinguishing between anonymous and
non-anonymous user contexts, and let version calls be made with anonymous
contexts, raise errors in the case of all other calls that demand a user context

* added more grade routes for fetching 'my' grades

0.1.7 (2012-08-10)
* added `service.get_profile_by_user_id()`

* added `data.LockerItem`, `data.LockerFolder`, `data.GroupLocker` to support
locker operations

* added to suite of locker functions to the `service` module to assist with locker
operations: this includes an example of how you might want to handle the
"simple upload" process for those Valence routes that use simple file upload

0.1.6 (2012-07-13)
* Fix bug in `update_social_media_url_by_url()`... we should look
for 'url'-keyed entries, not 'name'-keyed entries

* Some documentation revisions

* Remove 'exceptions' module as not utilized

0.1.5 (2012-07-11)
* Changed `D2LStructure.as_json()` to kick back a deep-copy of the encapsulated
data, instead of a ref to the instance's internal data structure

* Bug fixes

0.1.4 (2012-07-06)
* Refactoring and re-building of the libraries: moved data-structures into
`data` module and service-related functions into `service` module;
auth-related functionality remains in `auth`

* Re-worked samples to be more in line with design for the other client

0.1.0 (2012-06-02)
* Initial version
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