Update options to be a mapping instead of a simple namespace #6355
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Summary
This commit changes the options class to be a mapping instead of a
simple namespace. While we wanted to preserve attribute based access
primarily the simple namespace is too limited in practice and involves a
lot of hacking around the internals such as frequent calls to
Options.__dict__
to get an iterator of fields in the options. To improvethe usability of the class without breaking existing users this changes
the base class to be a
MutableMapping
and adds the necessary methods tomake it usable like a dict or a simple namespace.
Details and comments