PySide：QTreeView 到嵌套字典

Question

我需要帮助从 QTreeView 结构构建分层嵌套 dict 以获得如下内容：

 {"A": {"B": {"H": {}, "I": {"M": {}, "N": {}}}, "D": {}, "E": {}, "F": {}, "G": {"L": {}}, "C": {"J": {}, "K": {}}}}

{
    "A": {
        "B": {
            "H": {}, 
            "I": {
                "M": {}, 
                "N": {}
             }
        }, 
        "D": {}, 
        "E": {}, 
        "F": {}, 
        "G": {
            "L": {}
        }, 
        "C": {
            "J": {}, 
            "K": {}
        }
    }
}

在这种情况下我没有使用列，QTreeView 代表一个目录结构（我实际上是从上面的字典中提取它，只是想在修改树后重新创建字典）

我已经有这样的东西了：

def to_dict(self, _structure={}, _parent=''):
    sublist[self.name()] = self._children

    for child in self._children:
        _structure[self.name()] = sublist
        child.to_dict(_structure, self.name())

显然 self._children 是一个列表，所以它不起作用

编辑：我想我可能需要这样的东西：

def to_dict(self, _structure={}, _parent=''):

    sublist = {self.name(): {}}

    for child in self._children:
        if _parent == '':
            _structure = sublist
        else:
            _structure[_parent].update(sublist)
        child.to_dict(_structure, self.name())

    return _structure

这里的问题是......我需要在 _structure 字典中找到 _parent 键，据我所知，它总是在字典的最低级别......我真的需要搜索whole _structure dict 每次都想向给定的 _parent 添加一个新的 subdict 或者是否有更好的解决方案来解决我的问题？

Answer 1

要将字典转换为模型，则必须递归迭代字典，并根据数据类型将其插入模型。反之亦然。

from PySide import QtCore, QtGui

def fill_model_from_json(parent, d):
    if isinstance(d, dict):
        for k, v in d.items():
            child = QtGui.QStandardItem(str(k)) 
            parent.appendRow(child)
            fill_model_from_json(child, v)
    elif isinstance(d, list):
        for v in d:
            fill_model_from_json(parent, v)
    else:
        parent.appendRow(QtGui.QStandardItem(str(d)))

def fill_dict_from_model(parent_index, d):
    v = {}
    for i in range(model.rowCount(parent_index)):
        ix = model.index(i, 0, parent_index)
        fill_dict_from_model(ix, v)
    d[parent_index.data()] = v

def model_to_dict(model):
    d = dict()
    for i in range(model.rowCount()):
        ix = model.index(i, 0)
        fill_dict_from_model(ix, d)    
    return d

if __name__ == '__main__':
    import sys
    app = QtGui.QApplication(sys.argv)
    tree = QtGui.QTreeView()
    model = QtGui.QStandardItemModel()
    data =  {"A": {"B": {"H": {}, "I": {"M": {}, "N": {}}}, "D": {}, "E": {}, "F": {}, "G": {"L": {}}, "C": {"J": {}, "K": {}}}}
    fill_model_from_json(model.invisibleRootItem(), data)
    tree.setModel(model)
    tree.expandAll()
    tree.resize(360, 480)
    tree.show()
    d = model_to_dict(model)
    assert(d == data)
    print(d)
    sys.exit(app.exec_())

PySide：QTreeView 到嵌套字典

PySide: QTreeView to nested dictionary

python

dictionary

pyside

qtreeview