python - 在 Kivy 中显示 Ordereddict 列表

Question

我有一个 Ordereddict 列表如下

list1= [OrderedDict([('Numbers', '15'), ('FirstName', 'John'), ('SecondName', 'Raul'), ('MiddleName', 'Kyle'), ('Grade', 22)]),
OrderedDict([('Names', 'John'), ('NewFirstName', 'Mark'), ('NewSecondName', 'Sachel'), ('NewThirdName', 'Raul'), ('Grade', 15)]),
OrderedDict([('Numbers', '25'),  ('FirstName', 'Kyle'), ('SecondName', 'Venn'), ('MiddleName', 'Marcus'), ('Grade', 24)]),
OrderedDict([('Names', 'Sachel'), ('NewFirstName', 'Venn'), ('NewSecondName', 'Kyle'), ('NewThirdName', 'John'), ('Grade', 71)])]

其中有 8 个唯一键和一个公共键，我想用相同的顺序在 kivy 中创建一个表，键是表的标题。我的预期输出如下，我是 kivy 生态系统的新手，我没有看到任何类似 tableview 的东西，任何其他视图都可以用来获得这个输出以及如何

kivy的预期输出

我采用了评论中给出的更简单的回收视图示例，并将列数编辑为 9，并尝试从中选择值Ordereddict，我得到了以下输出，因为我是 kivy 的新手，我不确定是否按照预期输出

以下是.py和.kv文件

检查.py

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.button import Button
from kivy.properties import BooleanProperty, ListProperty, StringProperty, ObjectProperty
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 collections import OrderedDict
list1= [OrderedDict([('Numbers', '15'), ('FirstName', 'John'), ('SecondName', 'Raul'), ('MiddleName', 'Kyle'), ('Grade', 22)]),
OrderedDict([('Names', 'John'), ('NewFirstName', 'Mark'), ('NewSecondName', 'Sachel'), ('NewThirdName', 'Raul'), ('Grade', 15)]),
OrderedDict([('Numbers', '25'),  ('FirstName', 'Kyle'), ('SecondName', 'Venn'), ('MiddleName', 'Marcus'), ('Grade', 24)]),
OrderedDict([('Names', 'Sachel'), ('NewFirstName', 'Venn'), ('NewSecondName', 'Kyle'), ('NewThirdName', 'John'), ('Grade', 71)])]

class TextInputPopup(Popup):
    obj = ObjectProperty(None)
    obj_text = StringProperty("")

    def __init__(self, obj, **kwargs):
        super(TextInputPopup, self).__init__(**kwargs)
        self.obj = obj
        self.obj_text = obj.text


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


class SelectableButton(RecycleDataViewBehavior, Button):
    ''' Add selection support to the Button '''
    index = None
    selected = BooleanProperty(False)
    selectable = BooleanProperty(True)

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

    def on_touch_down(self, touch):
        ''' Add selection on touch down '''
        if super(SelectableButton, 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

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

    def update_changes(self, txt):
        self.text = txt


class RV(BoxLayout):

    # data_items = ListProperty(newlist)

    data_items = ListProperty([])
    def __init__(self, **kwargs):
        super(RV, self).__init__(**kwargs)
        self.get_users()

    def get_users(self):            
        # create data_items
        for i in list1:
                self.data_items.append(i.values())


class TestApp(App):
    title = "Kivy RecycleView & SQLite3 Demo"

    def build(self):
        return RV()


if __name__ == "__main__":
    TestApp().run()

测试.kv

#:kivy 1.10.0

<TextInputPopup>:
    title: "Popup"
    size_hint: None, None
    size: 400, 400
    auto_dismiss: False

    BoxLayout:
        orientation: "vertical"
        TextInput:
            id: txtinput
            text: root.obj_text
        Button:
            size_hint: 1, 0.2
            text: "Save Changes"
            on_release:
                root.obj.update_changes(txtinput.text)
                root.dismiss()
        Button:
            size_hint: 1, 0.2
            text: "Cancel Changes"
            on_release: root.dismiss()


<SelectableButton>:
    # Draw a background to indicate selection
    canvas.before:
        Color:
            rgba: (.0, 0.9, .1, .3) if self.selected else (0, 0, 0, 1)
        Rectangle:
            pos: self.pos
            size: self.size

<RV>:
    BoxLayout:
        orientation: "vertical"

        GridLayout:
            size_hint: 1, None
            size_hint_y: None
            height: 25
            cols: 9

            Label:
                text: "Numbers"
            Label:
                text: "FirstName"
            Label:
                text: "SecondName"
            Label:
                text: "MiddleName"
            Label:
                text: "Grade"
            Label:
                text: "Names"
            Label:
                text: "NewFirstName"
            Label:
                text: "NewSecondName"
            Label:
                text: "NewThirdName"


        BoxLayout:
            RecycleView:
                viewclass: 'SelectableButton'
                data: [{'text': str(x)} for x in root.data_items]
                SelectableRecycleGridLayout:
                    cols: 9
                    default_size: None, dp(26)
                    default_size_hint: 1, None
                    size_hint_y: None
                    height: self.minimum_height
                    orientation: 'horizontal'
                    multiselect: True
                    touch_multiselect: True

标签： pythonkivy

Answer 1

问题 - TableView

其中有 8 个唯一键和一个公共键，我想用相同的顺序在 kivy 中创建一个表，键是表的标题。

解决方案 - 使用 Kivy RecycleView

修改应用程序以从collections.OrderedDict

• 添加类型的类属性，ListProperty例如column_headings = ListProperty([])
• 实现嵌套for循环以提取键或列标题
• 实现嵌套for循环以提取值
• None用空字符串覆盖

片段

class RV(BoxLayout):
    column_headings = ListProperty([])
    data_items = ListProperty([])

    def __init__(self, **kwargs):
        super(RV, self).__init__(**kwargs)
        self.get_users()

    def get_users(self):

        # extract keys or column headings
        for row in list1:
            for key in row.keys():
                if key not in self.column_headings:
                    self.column_headings.append(key)

        # extract values
        values = []
        for row in list1:
            for key in self.column_headings:
                try:
                    values.append(str(row[key]))
                    del row[key]
                except KeyError:
                    values.append(None)

        # replace None with empty string
        self.data_items = ['' if x is None else x for x in values]

输出