Python/Kivy：ValueError：TreeViewLabelAccountGroup.text 只接受 str

Question

我已经用 Python (test.py) 和 kivy (test.kv) 编写了一些代码。当我运行 test.py 时。然后显示测试菜单和用户子菜单。当我点击用户时，然后 + 添加按钮显示。当单击+添加，然后显示数字文本框类型。
我在数字文本框中使用 treeView。当我单击选择数字时，它会给出错误
文件“kivy/_event.pyx”，第 273 行，在 kivy._event.EventDispatcher.init (kivy/_event.c:5375) 文件“kivy/properties.pyx”，第 478 行，在 kivy.properties.Property.set (kivy/properties.c:5171) 文件“kivy/properties.pyx”，第 513 行，在 kivy.properties.Property.set (kivy/properties.c:5882) ValueError: TreeViewLabelAccountGroup.text 只接受 str

如果我使用 rows = [(1, 'Male'), (2, 'Female'), (3, 'Dog')] 而不是 rows = [(1, 111), (2, 112), (3, 113)]
然后它工作正常。
我不知道我在哪里犯了错误。
如果我将文本更改为 int，那么它的工作但数据不显示。

if parent is None:
            tree_node = tree_view_account_group.add_node(TreeViewLabelAccountGroup(text=node['node_id'],
                                                         is_open=True))
        else:
            tree_node = tree_view_account_group.add_node(TreeViewLabelAccountGroup(text=node['node_id'],
                                                         is_open=True), parent)

test.py

import kivy

kivy.require('1.9.0')  # replace with your current kivy version !
import sqlite3 as lite
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.properties import BooleanProperty, ListProperty, StringProperty, ObjectProperty, NumericProperty
from kivy.lang import Builder
from kivy.uix.dropdown import DropDown

from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.button import Button
from kivy.uix.recyclegridlayout import RecycleGridLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.recycleview.layout import LayoutSelectionBehavior
from kivy.uix.popup import Popup
from kivy.core.window import Window
from kivy.uix.label import Label
Window.maximize()
from kivy.clock import Clock
from kivy.uix.treeview import TreeView, TreeViewLabel, TreeViewNode
from kivy.uix.image import AsyncImage
import os
import sys


#root.attributes("-toolwindow", 1)


class SelectableRecycleGridLayout(FocusBehavior, LayoutSelectionBehavior,
                                  RecycleGridLayout):
    ''' Adds selection and focus behaviour to the view. '''




def populate_tree_view_account_group(tree_view_account_group, parent, node):

    if parent is None:
        tree_node = tree_view_account_group.add_node(TreeViewLabelAccountGroup(text=node['node_id'],
                                                     is_open=True))
    else:
        tree_node = tree_view_account_group.add_node(TreeViewLabelAccountGroup(text=node['node_id'],
                                                     is_open=True), parent)

    for child_node in node['children']:
        populate_tree_view_account_group(tree_view_account_group, tree_node, child_node)

#this is retrieve from database
rows = [(1, 111), (2, 112), (3, 113)]
treeAccountGroup = []

for r in rows:
    treeAccountGroup.append({'node_id': r[1], 'children': []})


class TreeviewAccountGroup(Popup):
    treeviewAccount = ObjectProperty(None)
    tv = ObjectProperty(None)
    h = NumericProperty(0)
    #ti = ObjectProperty()
    popup = ObjectProperty()

    def __init__(self, **kwargs):
        super(TreeviewAccountGroup, self).__init__(**kwargs)
        self.tv = TreeView(root_options=dict(text=""),
                       hide_root=False,
                       indent_level=4)
        for branch in treeAccountGroup:
            populate_tree_view_account_group(self.tv, None, branch)
        #self.remove_widgets()
        self.treeviewAccount.add_widget(self.tv)
        Clock.schedule_once(self.update, 1)

    def remove_widgets(self):
        for child in [child for child in self.treeviewAccount.children]:
            self.treeviewAccount.remove_widget(child)

    def update(self, *args):
        self.h = len([child for child in self.tv.children]) * 24

    def filter(self, f):
        self.treeviewAccount.clear_widgets()
        self.tv = TreeView(root_options=dict(text=""),
                           hide_root=False,
                           indent_level=4)
        new_tree = []
        for n in treeAccountGroup:
            if f.lower() in n['node_id'].lower():
                new_tree.append(n)
        for branch in new_tree:
            populate_tree_view_account_group(self.tv, None, branch)

        self.treeviewAccount.add_widget(self.tv)

class TreeViewLabelAccountGroup(Label, TreeViewNode):
    pass

class AccountGroupPopup(Popup):
    category_label = ObjectProperty(None)
    category_text = ObjectProperty(None)
    name_label = ObjectProperty(None)
    name_txt = ObjectProperty(None)
    popupGroupAccount = ObjectProperty(None)
    popupEffect = ObjectProperty(None)

    groupType = ObjectProperty(None)

    mode = StringProperty("")
    col_data = ListProperty(["?", "?", "?", "?","?"])
    index = NumericProperty(0)
    popup4 = ObjectProperty(None)
    popup5 = ObjectProperty(None)

    primary_check_button = BooleanProperty(False)
    secondary_check_button = BooleanProperty(False)


    def __init__(self, obj, **kwargs):
        super(AccountGroupPopup, self).__init__(**kwargs)
        self.mode = obj.mode
        if obj.mode == "Add":
            self.col_data[0] = ''
            self.col_data[1] = ''
            self.col_data[2] = ''
            self.col_data[3] = 'Select Number'


    def display_primary_treeview(self, instance):
        if len(instance.text) > 0:
            if self.popupGroupAccount is None:
                self.popupGroupAccount = TreeviewAccountGroup()
                self.popupGroupAccount.popup4 = self
                self.popupGroupAccount.filter(instance.text)
            self.popupGroupAccount.open()

    def display_effect_type(self, instance):
        if len(instance.text) > 0:
            if self.popupEffect is None:
                self.popupEffect = TreeviewEffectType()
                self.popupEffect.popup5 = self
                self.popupEffect.filter(instance.text)
            self.popupEffect.open()

class SelectableButtonGroupAccount(RecycleDataViewBehavior, Button):
    ''' Add selection support to the Button '''
    index = None
    selected = BooleanProperty(False)
    selectable = BooleanProperty(True)
    rv_data_account_group = ObjectProperty(None)
    start_point = NumericProperty(0)
    mode = StringProperty("Update")

    def __init__(self, **kwargs):
        super(SelectableButtonGroupAccount, self).__init__(**kwargs)
        Clock.schedule_interval(self.update, .0005)


    def update(self, *args):
        self.text = self.rv_data_account_group[self.index][self.key]

    def refresh_view_attrs(self, rv, index, data):
        ''' Catch and handle the view changes '''
        self.index = index
        return super(SelectableButtonGroupAccount, self).refresh_view_attrs(rv, index, data)

    def on_touch_down(self, touch):
        ''' Add selection on touch down '''
        if super(SelectableButtonGroupAccount, self).on_touch_down(touch):
            return True
        if self.collide_point(*touch.pos) and self.selectable:
            return self.parent.select_with_touch(self.index, touch)

    def apply_selection(self, rv, index, is_selected):
        ''' Respond to the selection of items in the view. '''
        self.selected = is_selected
        self.rv_data_account_group = rv.data
        #print("selection changed to {0}".format(rv.data[1]))

    def on_press(self):
        popup = AccountGroupPopup(self)
        popup.open()

class RVACCOUNTGROUP(BoxLayout):

    def add_account_group(self):
        self.mode = "Add"
        popup = AccountGroupPopup(self)
        popup.open()

class CustDrop(DropDown):
    def __init__(self, **kwargs):
        super(CustDrop, self).__init__(**kwargs)
        self.select('')

class MainMenu(BoxLayout):
    content_area = ObjectProperty()
    rv = ObjectProperty(None)
    dropdown = ObjectProperty(None)

    def display_account_group(self):
        self.dropdown.dismiss()
        self.remove_widgets()
        self.rvarea = RVACCOUNTGROUP()
        self.content_area.add_widget(self.rvarea)

    def remove_widgets(self):
        self.content_area.clear_widgets()


    def insert_update(self, obj):
        print('Test')


class TacApp(App):
    title = "FactEx"

    def build(self):
        self.root = Builder.load_file('test.kv')
        return MainMenu()



if __name__ == '__main__':
    TacApp().run()

test.kv

#:kivy 1.10.0
#:import CoreImage kivy.core.image.Image
#:import os os

<TreeviewAccountGroup>:
    id: treeviewAccount
    treeviewAccount: treeviewAccount
    title: ""
    pos_hint: {'x': .65, 'y': .3}
    size_hint: .2,.4
    #size: 800, 800
    auto_dismiss: False

    BoxLayout
        orientation: "vertical"
        ScrollView:
            size_hint: 1, .9
            BoxLayout:
                size_hint_y: None
                id: treeviewAccount
                height: root.h
                rooot: root
        TextInput:
            id: treeview
            size_hint_y: .1
            on_text: root.filter(self.text)
        #BoxLayout:
            #id: treeview
            #on_press: root.select_node(self.text)
        Button:
            size_hint: 1, 0.1
            text: "Close"
            on_release: root.dismiss()


<TreeviewEffectType>:
    #id: treeviewAccount
    treeviewEffectType: treeviewEffectType
    title: ""
    pos_hint: {'x': .65, 'y': .3}
    size_hint: .2,.4
    #size: 800, 800
    auto_dismiss: False

    BoxLayout
        orientation: "vertical"
        ScrollView:
            size_hint: 1, .9
            BoxLayout:
                size_hint_y: None
                id: treeviewEffectType
                height: root.h
                rooot: root
        TextInput:
            id: treeview
            size_hint_y: .1
            on_text: root.filter(self.text)
        #BoxLayout:
            #id: treeview
            #on_press: root.select_node(self.text)
        Button:
            size_hint: 1, 0.1
            text: "Close"
            on_release: root.dismiss()

<TreeViewLabelEffectType>:
    height: 24
    on_touch_down:
        root.parent.parent.rooot.popup5.col_data[4] = self.text
        #app.root.effect_type_txt.text = self.text
        #root.parent.parent.rooot.popup5.popup.dismiss()

<TreeViewLabelAccountGroup>:
    height: 24
    on_touch_down:
        root.parent.parent.rooot.popup4.col_data[3] = self.text
        #app.root.effect_type_txt.text = self.text
        #app.root.popupEffect.dismiss()


<AccountGroupPopup>:
    title: ""
    size_hint: None, None
    size: 500, 350
    auto_dismiss: False





    BoxLayout:
        orientation: "vertical"

        GridLayout:
            cols: 2
            padding : 30, 0
            row_default_height: '30dp'
            size_hint: 1, .1
            pos_hint: {'x': .1, 'y': .06}

        GridLayout:
            cols: 2
            padding: 10, 10
            spacing: 20, 20
            #row_default_height: '30dp'
            size_hint: 1, .7
            pos_hint: {'x': 0, 'y':.65}

            Label:
                id:category_label
                text: 'Number'
                text_size: self.size
                valign: 'middle'

            TextInput:
                id: category_text
                text: root.col_data[3]
                on_focus: root.display_primary_treeview(self)

            Button:
                text: 'Ok'
                on_release:
                    #root.package_changes(name_txt.text,primary_group_txt.text,effect_type_txt.text)
                    app.root.insert_update(root)
                    root.dismiss()


            Button:
                text: 'Cancel'
                on_release: root.dismiss()

<AccountGroup@RecycleView>:
    viewclass: 'SelectableButtonGroupAccount'
    SelectableRecycleGridLayout:
        cols: 1
        default_size: None, dp(26)
        default_size_hint: 1, None
        size_hint_y: None
        height: self.minimum_height
        orientation: 'vertical'
        multiselect: True
        touch_multiselect: True

<RVACCOUNTGROUP>:
    BoxLayout:
        orientation: "vertical"
        Button:
            size_hint: .05, .03
            text: "+Add"
            on_press: root.add_account_group()


<DropdownButton@Button>:
    border: (0, 16, 0, 16)
    text_size: self.size
    valign: "middle"
    padding_x: 5
    size_hint_y: None
    height: '30dp'
    #on_release: dropdown.select('')
    #on_release: app.root.test
    background_color: 90 , 90, 90, 90
    color: 0, 0.517, 0.705, 1



<MenuButton@Button>:
    text_size: self.size
    valign: "middle"
    padding_x: 5
    size : (80,30)
    size_hint : (None, None)
    background_color: 90 , 90, 90, 90
    background_normal: ''
    color: 0, 0.517, 0.705, 1
    border: (0, 10, 0, 0)


<MainMenu>:
    content_area: content_area
    dropdown: dropdown

    BoxLayout:
        orientation: 'vertical'
        #spacing : 10

        BoxLayout:
            canvas.before:
                Rectangle:
                    pos: self.pos
                    size: self.size

            size_hint_y: 1

            MenuButton:
                id: btn
                text: 'Test'
                size : (60,30)
                on_release: dropdown.open(self)

            CustDrop:
                id: dropdown
                auto_width: False
                width: 150

                DropdownButton:
                    text: 'User'
                    size_hint_y: None
                    height: '32dp'
                    # on_release: dropdown3.open(self)
                    on_release: root.display_account_group()


        BoxLayout:
            id: content_area
            size_hint_y: 30


        Label:
            size_hint_y: 1

有人可以帮我吗？

Answer 1

您需要将node_id 转换为str：

for r in rows:
    treeAccountGroup.append({'node_id': str(r[1]), 'children': []})