refactor: Adopt the type-lens package. #117
Merged
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Not going to work in the short term. Some of the required functionality isn't merged yet, and none of it is in a released version.Also, type-lens only supports python 3.9+, which is unfortunate. Although https://pypistats.org/packages/cappa maybe implies 3.8 is currently only installed when CI runs.Also, all the variable names are currently "annotation", but probably ought to betype_view
, soannotation.annotation
doesn't look so stupidExternalize all the various little version-specific python typing handling and various typing related utilities into the
type-lens
package. Much of the type-lens API we use came from cappa's impls, but rebased on the much more comprehensiveTypeView
base provided by it.