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44 lines
1000 B
44 lines
1000 B
from collections import KeysView, ItemsView, ValuesView
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class SillyInt(int):
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def __add__(self, num):
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return 0
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a = SillyInt(1)
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b = SillyInt(2)
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print("{} + {} = {}".format(a, b, a+b))
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class DictSorted(dict):
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def __new__(*args, **kwargs):
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new_dict = dict.__new__(*args, **kwargs)
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new_dict.ordered_keys = []
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return new_dict
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def __setitem__(self, key, value):
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"""self[key] = value syntax"""
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if key not in self.ordered_keys:
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self.ordered_keys.append(key)
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super().__setitem__(key, value)
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def setdefault(self, key, value):
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if key not in self.ordered_keys:
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self.ordered_keys.append(key)
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return super().setdefault(key, value)
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def keys(self):
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return KeysView(self)
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def values(self):
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return ValuesView(self)
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def items(self):
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return ItemsView(self)
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def __iter__(self):
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"""for x in self syntax"""
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return self.ordered_keys.__iter__()
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