试图用python中的json/didictionary递归填充ttk.treeview

Question

我是python的新手，但有java经验。完全不同的动物。我有一个基于遍历目录结构创建json/字典的方法，它创建了一个json，如下所示。我正在尝试获得另一种基于它来填充树视图的方法。我在stackoverflow上看到了几个例子，并试图遵循它们。以下是我的想法，但在浏览第一个目录后，它总是会出错，就像它忘记了它在哪里一样。返回以下错误：

Traceback (most recent call last):
File "temp.py", line 147, in <module>
load_treeview_from_project_dictionary(myData, tree_view)
File "temp.py", line 134, in load_treeview_from_project_dictionary
load_treeview_from_project_dictionary(c, tree_view, int(c['index']))
File "temp.py", line 136, in load_treeview_from_project_dictionary
tree_view.insert(parent_id, "end", text=c['name'], values=("", ""))
File "C:Users...AppDataLocalProgramsPythonPython39libtkinterttk.py", line 1364, in insert
res = self.tk.call(self._w, "insert", parent, index, *opts)
_tkinter.TclError: Item 1 not found

我花了几个小时试图重构并弄清楚这一点，但都没有成功。我现在向这个伟大的社区伸出援手，指出我的错误！请帮忙。

import json
import tkinter
from tkinter import ttk
from tkinter.ttk import Label

myData = {
"name": "MyRoot",
"type": "directory",
"index": 0,
"children": [
{
"name": "SubDir1",
"type": "directory",
"index": 1,
"children": [
{
"name": "apic.png",
"type": "file"
}
]
},
{
"name": "SubDir2",
"type": "directory",
"index": 2,
"children": [
{
"name": "somefile.txt",
"type": "file"
},
{
"name": "anotherfile.txt",
"type": "file"
}
]
},
{
"name": "SubDir3",
"type": "directory",
"index": 3,
"children": []
},
{
"name": "SubDir4",
"type": "directory",
"index": 4,
"children": [
{
"name": "asomefile.txt",
"type": "file"
},
{
"name": "bsomefile.txt",
"type": "file"
},
{
"name": "csomefile.txt",
"type": "file"
},
{
"name": "dsomefile.txt",
"type": "file"
},
{
"name": "esomefile.txt",
"type": "file"
}
]
},
{
"name": "SubDir5",
"type": "directory",
"index": 5,
"children": [
{
"name": "NesterDir1",
"type": "directory",
"index": 6,
"children": []
}
]
},
{
"name": "SubDir6",
"type": "directory",
"index": 7,
"children": []
},
{
"name": "SubDir7",
"type": "directory",
"index": 8,
"children": []
},
{
"name": "SubDir8",
"type": "directory",
"index": 9,
"children": []
},
{
"name": "SubDir9",
"type": "directory",
"index": 10,
"children": []
},
{
"name": "SubDir10",
"type": "directory",
"index": 11,
"children": []
},
{
"name": "SubDir11",
"type": "directory",
"index": 12,
"children": []
}
]
}

def load_treeview_from_project_dictionary(data, my_tree_view, parent_id=None):
print("this:" + data['name'] + " called function!")
if parent_id is None:
my_tree_view.insert("", "0", text=data['name'], values=("", ""))  # applies to first iteration only
if data['children'] is not None:
for c in data['children']:
print("child: " + c['name'])
if c['type'] == "directory":
my_tree_view.insert('', int(c['index']), text=c['name'], values=("", ""))
load_treeview_from_project_dictionary(c, my_tree_view, int(c['index']))
else:
my_tree_view.insert(parent_id, "end", text=c['name'], values=("", ""))
load_treeview_from_project_dictionary(c, my_tree_view, parent_id)

root = tkinter.Tk()
main_label = Label(root, text="Directory Tree")
tree_view = ttk.Treeview(root, height=23)
tree_view.heading("#0", text="Directory Structure")
load_treeview_from_project_dictionary(myData, tree_view)
main_label.pack()
tree_view.pack()
root.mainloop()

提前感谢！

Answer 1

所以。在查看了D.L发布的教程链接，然后一遍又一遍地梳理我的代码和调试后，我得出的结论是递归太多了。看着流程，我发现这个方法总是在第一个文件添加到树中后停止。在文件插入后进行递归调用修复了大部分问题。我仔细检查了插入过程，发现我可以将json中的索引用于树视图的iid。然后我决定使用treeview.move将条目放置在插入时我想要的位置会更有效。以下是我的想法，效果很好我在这里为遇到同样问题的其他人发布这篇文章在代码之后，会有一个生成的树视图的屏幕截图(或者由于我的排名，它的链接-我稍后会尝试修复(

import json
import tkinter
from tkinter import ttk
from tkinter.ttk import Label
myData = {
"name": "MyRoot",
"type": "directory",
"index": 0,
"children": [
{
"name": "SubDir1",
"type": "directory",
"index": 1,
"children": [
{
"name": "apic.png",
"type": "file"
}
]
},
{
"name": "SubDir2",
"type": "directory",
"index": 2,
"children": [
{
"name": "somefile.txt",
"type": "file"
},
{
"name": "anotherfile.txt",
"type": "file"
}
]
},
{
"name": "SubDir3",
"type": "directory",
"index": 3,
"children": []
},
{
"name": "SubDir4",
"type": "directory",
"index": 4,
"children": [
{
"name": "asomefile.txt",
"type": "file"
},
{
"name": "bsomefile.txt",
"type": "file"
},
{
"name": "csomefile.txt",
"type": "file"
},
{
"name": "dsomefile.txt",
"type": "file"
},
{
"name": "esomefile.txt",
"type": "file"
}
]
},
{
"name": "SubDir5",
"type": "directory",
"index": 5,
"children": [
{
"name": "NestedDir1",
"type": "directory",
"index": 6,
"children": [
{
"name": "yetAnotherfile.txt",
"type": "file"
}
]
}
]
},
{
"name": "SubDir6",
"type": "directory",
"index": 7,
"children": []
},
{
"name": "SubDir7",
"type": "directory",
"index": 8,
"children": []
},
{
"name": "SubDir8",
"type": "directory",
"index": 9,
"children": []
},
{
"name": "SubDir9",
"type": "directory",
"index": 10,
"children": []
},
{
"name": "SubDir10",
"type": "directory",
"index": 11,
"children": []
},
{
"name": "SubDir11",
"type": "directory",
"index": 12,
"children": []
}
]
}

def load_treeview_from_project_dictionary(data, my_tree_view, parent_id=None):
print('this:' + data['name'] + ' called function!')
if parent_id is None:
my_tree_view.insert('', '0', text=data['name'], iid=0)  # applies to first iteration only
for c in data['children']:
print('child: ' + c['name'])
if c['type'] == 'directory':
my_tree_view.insert('', 'end', text=c['name'], iid=c['index'])
my_tree_view.move(c['index'], data['index'], 'end')
load_treeview_from_project_dictionary(c, my_tree_view, data['index'])
else:
file_index = my_tree_view.insert('', 'end', text=c['name'])
my_tree_view.move(file_index, data['index'], 'end')

root = tkinter.Tk()
main_label = Label(root, text='Directory Tree')
tree_view = ttk.Treeview(root, height=23)
tree_view.heading('#0', text='Directory Structure')
load_treeview_from_project_dictionary(myData, tree_view)
main_label.pack()
tree_view.pack()
root.mainloop()

树视图屏幕截图