Commits on Mar 13, 2024

1. Make dict views behave like their unrestricted versions …

   unlike the restricted versions, the unrestricted versions:
    - are not iterators, they are views
    - have a len
    - are false when the mapping is empty, true otherwise
    - are instances of collections.abc.MappingView
   
   This change aligns the behavior of restricted versions with the behavior
   of unrestricted one, while keeping the "guard", which validates the
   access with the security manager.
   
   During this refactoring, also change `.items()` to validate
   ach keys and values, like `.keys()` and `.values()` do.
   
   Co-authored-by: Dieter Maurer <d-maurer@users.noreply.github.com>

   

   perrinjerome and d-maurer committed Mar 13, 2024
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