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allow db implementations to have iterable views #2073

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charles-cooper opened this issue Jun 29, 2022 · 0 comments
Open

allow db implementations to have iterable views #2073

charles-cooper opened this issue Jun 29, 2022 · 0 comments

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@charles-cooper
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What is wrong?

currently, an AtomicDB cannot be iterated over. this makes it tricky to inspect, ex.

>>> t.env.vm.state._db.items()
ItemsView(<eth.db.atomic.AtomicDB object at 0x7fdf23f260e0>)
>>> list(t.env.vm.state._db.items())
NotImplementedError: By default, DB classes cannot return the total number of keys.

How can it be fixed

probably, add __iter__ and __len__ methods to all useful db classes
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@charles-cooper