F #4188: Enabled custom attributes at Python binding

[ms4ons]

Description

Added TemplatedType._buildAttributes that will be inherited by binding classes and called indirectly from bindings.parseString.

It will add custom_attrs field of type dict to the result of parseString, e.g.:

>>> result.custom_attrs
{'x': 'y'}
>>> result.HOST[0].custom_attrs
{'a': 'b', 'c': 'd'}

Branches to which this PR applies

• master
• one-6.8
• one-6.4

---

• Check this if this PR should not be squashed