52 lines
1.4 KiB
Python
52 lines
1.4 KiB
Python
class Context(object):
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def __init__(self, parent=None):
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self._parent = parent
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self._data = None
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def _get_data(self):
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if self._data is None:
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self._data = {} if self._parent is None \
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else self._parent._get_data().copy()
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return self._data
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def __getitem__(self, item):
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context, path = self._parseContext(item)
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return context._get_data().get(path)
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def __setitem__(self, key, value):
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context, path = self._parseContext(key)
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context._get_data()[path] = value
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def _parseContext(self, path):
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context = self
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index = 0
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for c in path:
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if c == ':' and context._parent is not None:
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context = context._parent
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elif c == '/':
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while context._parent is not None:
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context = context._parent
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else:
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break
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index += 1
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return context, path[index:]
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def assign_from(self, context, copy=False):
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self._parent = context._parent
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self._data = context._data
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if copy and self._data is not None:
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self._data = self._data.copy()
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@property
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def parent(self):
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return self._parent
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def __str__(self):
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if self._data is not None:
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return str(self._data)
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if self._parent:
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return str(self._parent)
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return str({})
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