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from abc import ABC |
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3
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__all__ = ['ObjectRegistry', 'ObjectRegistryError'] |
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4
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5
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6
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class ObjectRegistry(ABC): |
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"""Simple dict-like retrieval/inserting "store" facility.""" |
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def __new__(cls, *args, **kwargs): |
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object_registry = super().__new__(cls) |
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if args: |
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object_registry.objects = args[0] |
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else: |
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object_registry.objects = {} |
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return object_registry |
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def add(self, key, value): |
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if self.objects.get(key, None): |
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raise ObjectRegistryError(f"Requested to insert value '{value}' in already existing key '{key}'. " |
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f"All keys are [{', '.join(_ for _ in self.objects)}]") |
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self.objects[key] = value |
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def remove(self, key): |
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if key not in self.objects: |
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raise ObjectRegistryError(f"Requested to remove item with key {key}, which does not exist.") |
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self.objects.pop(key) |
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def pop(self, key): |
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if key not in self.objects: |
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raise ObjectRegistryError(f"Requested to pop item with key {key}, which does not exist.") |
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return self.objects.pop(key) |
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def get(self, key): |
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if key not in self.objects: |
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raise ObjectRegistryError(f"Requested to get item with key {key}, which does not exist.") |
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return self.objects[key] |
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def __iter__(self): |
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return iter(self.objects.items()) |
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def __contains__(self, item): |
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return item in self.objects |
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def __eq__(self, other): |
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return dict(self.objects) == dict(other) |
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def __repr__(self): |
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return repr(self.objects) |
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50
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51
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class ObjectRegistryError(Exception): pass |
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boromir674 /
so-magic
