[issue32792] ChainMap should preserve order of underlying mappings

[Serhiy Storchaka]

Serhiy Storchaka <storchaka+cpython at gmail.com> added the comment:

An alternate implementation:

d = {}
for mapping in reversed(self.maps):
    d.update(mapping)
return iter(d)

Unfortunately both implementations work only with hashable keys. In general case mappings may be not hashtables.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue32792>
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