Zeep

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- Add flag to disable strict mode in the Client. This allows zeep to better
work with non standard compliant SOAP Servers. See the documentation for
usage and potential downsides.
- Minor refactor of resolving of elements for improved performance
- Support the SOAP 1.2 'http://www.w3.org/2003/05/soap/bindings/HTTP/'
transport uri (355)
- Fallback to matching wsdl lookups to matching when the target namespace is
empty (356)
- Improve the handling of xsd:includes, the default namespace of the parent
schema is now also used during resolving of the included schema. (360)
- Properly propagate the global flag for complex types when an xsd:restriction
is used (360)
- Filter out duplicate types and elements when dump the wsdl schema (360)
- Add ``zeep.CachingClient()`` which enables the SqliteCache by default

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- Fix an attribute error when an complexType used xsd:anyType as base
restriction (352)
- Update asyncio transport to return requests.Response objects (335)

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- Use cgi.parse_header() to extract media_type for multipart/related checks
(327)
- Don't ignore nil elements, instead return None when parsing xml (328)
- Fix regression when using WSA with an older lxml version (197)

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- Add support for SOAP attachments (multipart responses). (Dave Wapstra, 302)
- Update xsd:anyType to return the xml elements when no type is given via the
xsi:type attribute (284)
- Fix parsing Any elements when a restriction is used (soap-enc:array) (322)

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This release again introduces some backwords incompatibilties. The next release
will hopefully be 1.0 which will introduce semver.

- **backwards-incompatible**: The Transport class now accepts a
``requests.Session()`` object instead of ``http_auth`` and ``verify``. This
allows for more flexibility.
- **backwards-incompatible**: Zeep no longer sets a default cache backend.
Please see http://docs.python-zeep.org/en/master/transport.html#caching for
information about how to configure a cache.
- Add ``zeep.xsd.SkipValue`` which instructs the serialize to ignore the
element.
- Support duplicate target namespaces in the wsdl definition (320)
- Fix resolving element/types for xsd schema's with duplicate tns (319)

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- **Important:** Add basic validation against the xsd. It currently will only
validate the minOccurs/maxOccurs but this will be extended in the future.
- Add support for duplicate namespace definitions. Previously imports for
namespaces which were already imported were ignored. It will now search
through all matching schemas with the tns to find a specific object (204)
- Fix xsd:extension for sequence -> choice. (257)
- Improve serializing attributes when the values were passed as a dict (125)