A dictionary that keeps its keys in the order in which they're inserted. Copied from Django's SortedDict with some modifications.
| 1 | class OrderedDict(dict): |
| 2 | """ |
| 3 | A dictionary that keeps its keys in the order in which they're inserted. |
| 4 | |
| 5 | Copied from Django's SortedDict with some modifications. |
| 6 | |
| 7 | """ |
| 8 | def __new__(cls, *args, **kwargs): |
| 9 | instance = super(OrderedDict, cls).__new__(cls, *args, **kwargs) |
| 10 | instance.keyOrder = [] |
| 11 | return instance |
| 12 | |
| 13 | def __init__(self, data=None): |
| 14 | if data is None: |
| 15 | data = {} |
| 16 | super(OrderedDict, self).__init__(data) |
| 17 | if isinstance(data, dict): |
| 18 | self.keyOrder = list(data.keys()) |
| 19 | else: |
| 20 | self.keyOrder = [] |
| 21 | for key, value in data: |
| 22 | if key not in self.keyOrder: |
| 23 | self.keyOrder.append(key) |
| 24 | |
| 25 | def __deepcopy__(self, memo): |
| 26 | from copy import deepcopy |
| 27 | return self.__class__([(key, deepcopy(value, memo)) |
| 28 | for key, value in self.items()]) |
| 29 | |
| 30 | def __setitem__(self, key, value): |
| 31 | super(OrderedDict, self).__setitem__(key, value) |
| 32 | if key not in self.keyOrder: |
| 33 | self.keyOrder.append(key) |
| 34 | |
| 35 | def __delitem__(self, key): |
| 36 | super(OrderedDict, self).__delitem__(key) |
| 37 | self.keyOrder.remove(key) |
| 38 | |
| 39 | def __iter__(self): |
| 40 | for k in self.keyOrder: |
| 41 | yield k |
| 42 | |
| 43 | def pop(self, k, *args): |
| 44 | result = super(OrderedDict, self).pop(k, *args) |
| 45 | try: |
| 46 | self.keyOrder.remove(k) |
| 47 | except ValueError: |
| 48 | # Key wasn't in the dictionary in the first place. No problem. |
| 49 | pass |
| 50 | return result |
| 51 | |
| 52 | def popitem(self): |
| 53 | result = super(OrderedDict, self).popitem() |
| 54 | self.keyOrder.remove(result[0]) |
| 55 | return result |
| 56 | |
| 57 | def items(self): |
| 58 | return list(zip(self.keyOrder, list(self.values()))) |
| 59 | |
| 60 | def iteritems(self): |
no outgoing calls
no test coverage detected