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# -*- coding: utf-8 -*- |
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from benedict.utils import dict_util, keypath_util |
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class KeypathDict(dict): |
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_keypath_separator = None |
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def __init__(self, *args, **kwargs): |
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""" |
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Constructs a new instance. |
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""" |
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self._keypath_separator = kwargs.pop('keypath_separator', '.') |
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super(KeypathDict, self).__init__(*args, **kwargs) |
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keypath_util.check_keys(self, self._keypath_separator) |
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@property |
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def keypath_separator(self): |
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return self._keypath_separator |
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@keypath_separator.setter |
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def keypath_separator(self, value): |
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keypath_util.check_keys(self, value) |
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self._keypath_separator = value |
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def __contains__(self, key): |
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keys = keypath_util.list_keys(key, self._keypath_separator) |
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if len(keys) > 1: |
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return self.__contains_by_keys(keys) |
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key = keys[0] |
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return super(KeypathDict, self).__contains__(key) |
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def __contains_by_keys(self, keys): |
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parent, key, _ = dict_util.resolve(self, keys)[-1] |
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if isinstance(parent, dict) and key in parent: |
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return True |
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return False |
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def __delitem__(self, key): |
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keys = keypath_util.list_keys(key, self._keypath_separator) |
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if len(keys) > 1: |
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self.__delitem_by_keys(keys) |
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return |
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key = keys[0] |
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super(KeypathDict, self).__delitem__(key) |
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def __delitem_by_keys(self, keys): |
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parent, key, _ = dict_util.resolve(self, keys)[-1] |
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if isinstance(parent, dict): |
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del parent[key] |
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return |
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raise KeyError |
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def __getitem__(self, key): |
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keys = keypath_util.list_keys(key, self._keypath_separator) |
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value = None |
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if len(keys) > 1: |
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return self.__getitem_by_keys(keys) |
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key = keys[0] |
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return super(KeypathDict, self).__getitem__(key) |
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def __getitem_by_keys(self, keys): |
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parent, key, _ = dict_util.resolve(self, keys)[-1] |
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if isinstance(parent, dict): |
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return parent[key] |
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raise KeyError |
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def __setitem__(self, key, value): |
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keypath_util.check_keys(value, self._keypath_separator) |
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keys = keypath_util.list_keys(key, self._keypath_separator) |
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if len(keys) > 1: |
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self.__setitem_by_keys(keys, value) |
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return |
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key = keys[0] |
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super(KeypathDict, self).__setitem__(key, value) |
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def __setitem_by_keys(self, keys, value): |
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i = 0 |
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j = len(keys) |
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item = self |
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while i < j: |
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key = keys[i] |
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if i < (j - 1): |
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subitem = item.get(key, None) |
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if not isinstance(subitem, dict): |
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subitem = item[key] = {} |
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item = subitem |
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i += 1 |
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continue |
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item[key] = value |
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break |
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@classmethod |
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def fromkeys(cls, sequence, value=None): |
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d = cls() |
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for key in sequence: |
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d[key] = value |
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return d |
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def get(self, key, default=None): |
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keys = keypath_util.list_keys(key, self._keypath_separator) |
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if len(keys) > 1: |
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return self.__get_by_keys(keys, default) |
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key = keys[0] |
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return super(KeypathDict, self).get(key, default) |
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def __get_by_keys(self, keys, default=None): |
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parent, key, _ = dict_util.resolve(self, keys)[-1] |
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if isinstance(parent, dict): |
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return parent.get(key, default) |
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return default |
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def pop(self, key, *args): |
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keys = keypath_util.list_keys(key, self._keypath_separator) |
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if len(keys) > 1: |
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return self.__pop_by_keys(keys, *args) |
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return super(KeypathDict, self).pop(key, *args) |
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def __pop_by_keys(self, keys, *args): |
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parent, key, _ = dict_util.resolve(self, keys)[-1] |
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if isinstance(parent, dict): |
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return parent.pop(key, *args) |
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if args: |
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# default |
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return args[0] |
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raise KeyError |
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def set(self, key, value): |
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self.__setitem__(key, value) |
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def setdefault(self, key, default=None): |
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if key not in self: |
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self.__setitem__(key, default) |
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return default |
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return self.__getitem__(key) |
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def update(self, other): |
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keypath_util.check_keys(other, self._keypath_separator) |
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super(KeypathDict, self).update(other) |
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fabiocaccamo /
python-benedict
