在Kivy中显示Ordereddict的列表

问题描述

我有一个Ordereddict列表，如下所示

I have a list of Ordereddict as follows

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，我想以相同的顺序从中创建一个表，键是表的标题.我的预期输出如下所示，我是kivy生态系统的新手，我看不到像tableview这样的东西，任何其他视图都可以用来获取此输出以及如何获取

There are 8 unique keys and one common key in it, i would like to create a table from it in kivy with the same order, with keys being the header of the table. My expected output is as below, i am new to kivy ecosystem and i dont see anything like tableview in that, any other views could be used to get this output and how

以期望的速度输出

我采用了注释中给出的更简单的Recycyle视图示例，并将第no列编辑为9，并尝试从Ordereddict中选择值，并且得到了以下输出，因为我是kivy的新手，我不确定是否要拉预期输出中的值

I took the simpler recycyle view example given in the comment and edited the no of columns to 9 and tried picking the values from Ordereddict and i got the below output, since i am new to kivy i am not sure to pull the values as in expected output

下面是.py和.kv文件

check.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()

test.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

推荐答案

问题-TableView

解决方案-使用Kivy RecycleView

修改应用程序以从collections.OrderedDict

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

• Add a class attribute of type ListProperty e.g. column_headings = ListProperty([])
• Implement nested for loop to extract keys or column headings
• Implement nested for loop to extract values
• Override None with empty string

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

这篇关于在Kivy中显示Ordereddict的列表的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！