问题描述

我想将(csv-)表的数据放入 kivy recycleview.

如果我将固定文本分配给 kv 中的标签，我设法在一行中插入多个列，但我无法让它用字典列表中的数据填充标签.到目前为止，这是我用来测试概念的代码:

from kivy.app import App从 kivy.lang 导入生成器从 kivy.uix.recycleview 导入 RecycleView从 kivy.uix.boxlayout 导入 BoxLayout导入 csvitems = [{'SP1': 'Artikelnummer', 'SP2': '姓名', 'SP3': 'Groesse'},{'SP1': '510001', 'SP2': '大泵', 'SP3': '1.50 L'},{'SP1':'523001'，'SP2':'Leonie Still'，'SP3':'1.50 L'}，{'SP1':'641301'，'SP2':'可乐混合'，'SP3':'1.50 L'}]类表(BoxLayout):def __init__(self, **kwargs):super(Tabelle, self).__init__(**kwargs)def insert_SP(自我，数据):对于数据中的 i:self.spalte1_SP = i['SP1']#print(self.spalte1_SP)self.spalte2_SP = i['SP2']self.spalte3_SP = i['SP3']builder.load_string('''<塔贝尔>:方向:水平"spalte1_SP: 'spalte1'spalte2_SP: 'spalte2'spalte3_SP: 'spalte3'标签:编号:Spalte1文本:root.spalte1_SP标签:编号:Spalte2文本:root.spalte2_SP标签:编号:Spalte3文本:root.spalte3_SP<房车>:视图类:塔贝尔"回收箱布局:default_size:无，dp(20)default_size_hint:1，无size_hint_y:无高度:self.minimum_height方向:垂直"''')房车类(回收视图):def __init__(self, **kwargs):超级(房车，自我).__init__(**kwargs)#self.data = []x = 表()x.insert_SP(项目)类测试应用程序(应用程序):定义构建(自我):返回 RV()如果 __name__ == '__main__':TestApp().run()

我希望在 3 列中看到来自 items 的数据，但由于某种原因它们保持为空.

解决方案

它是空的，因为 data 没有填充.

解决方案

• 删除 class Tabelle()
中的所有编码
• 将 pass 添加到 class Tabelle()
• 将以下内容添加到 class RV()
的构造函数中，__init__()

片段

self.data = [{'spalte1_SP': str(x['SP1']), 'spalte2_SP': str(x['SP2']), 'spalte3_SP': str(x['SP3'])} for x in items]

I want to put the data of a (csv-)table into a kivy recycleview.

I managed to insert multiple columns with one row, if i assign a fixed text to the Labels in the kv, but i can't get it to fill the labels with data from a dictionary list. This is the code so far, that i use to test the concept:

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.recycleview import RecycleView
from kivy.uix.boxlayout import BoxLayout
import csv

items = [{'SP1': 'Artikelnummer', 'SP2': 'Name', 'SP3': 'Groesse'},
    {'SP1': '510001', 'SP2': 'Big Pump', 'SP3': '1.50 L'},
    {'SP1': '523001', 'SP2': 'Leonie Still', 'SP3': '1.50 L'},
    {'SP1': '641301', 'SP2': 'Cola Mix', 'SP3': '1.50 L'}
]

class Tabelle(BoxLayout):
    def __init__(self, **kwargs):
        super(Tabelle, self).__init__(**kwargs)

    def insert_SP(self, data):
        for i in data:
            self.spalte1_SP = i['SP1']
            #print(self.spalte1_SP)
            self.spalte2_SP = i['SP2']
            self.spalte3_SP = i['SP3']

Builder.load_string('''
<Tabelle>:
    orientation: 'horizontal'
    spalte1_SP: 'spalte1'
    spalte2_SP: 'spalte2'
    spalte3_SP: 'spalte3'
    Label:
        id: Spalte1
        text: root.spalte1_SP
    Label:
        id: Spalte2
        text: root.spalte2_SP
    Label:
        id: Spalte3
        text: root.spalte3_SP

<RV>:
    viewclass: 'Tabelle'
    RecycleBoxLayout:
        default_size: None, dp(20)
        default_size_hint: 1, None
        size_hint_y: None
        height: self.minimum_height
        orientation: 'vertical'
''')

class RV(RecycleView):
    def __init__(self, **kwargs):
        super(RV, self).__init__(**kwargs)
        #self.data = []
        x = Tabelle()
        x.insert_SP(items)

class TestApp(App):
    def build(self):
        return RV()

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

I expect to see the data from items in 3 columns, but they stay empty for some reason.

解决方案

It is empty because data was not populated.

Solution

• Remove all codings in class Tabelle()
• Add pass into class Tabelle()
• Add the following into constructor, __init__() of class RV()

Snippets

self.data = [{'spalte1_SP': str(x['SP1']), 'spalte2_SP': str(x['SP2']), 'spalte3_SP': str(x['SP3'])} for x in items]

Kivy RecycleView » data

The view is generatad by processing the data, essentially a list of dicts, and uses these dicts to generate instances of the viewclass as required.

data

The data used by the current view adapter. This is a list of dicts whose keys map to the corresponding property names of the viewclass.

data is an AliasProperty that gets and sets the data used to generate the views.

Example

main.py

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.recycleview import RecycleView
from kivy.uix.boxlayout import BoxLayout

items = [{'SP1': 'Artikelnummer', 'SP2': 'Name', 'SP3': 'Groesse'},
         {'SP1': '510001', 'SP2': 'Big Pump', 'SP3': '1.50 L'},
         {'SP1': '523001', 'SP2': 'Leonie Still', 'SP3': '1.50 L'},
         {'SP1': '641301', 'SP2': 'Cola Mix', 'SP3': '1.50 L'}
         ]


class Tabelle(BoxLayout):
    pass


Builder.load_string('''
<Tabelle>:
    orientation: 'horizontal'
    spalte1_SP: 'spalte1'
    spalte2_SP: 'spalte2'
    spalte3_SP: 'spalte3'
    Label:
        id: SP1
        text: root.spalte1_SP
    Label:
        id: SP2
        text: root.spalte2_SP
    Label:
        id: SP3
        text: root.spalte3_SP

<RV>:
    viewclass: 'Tabelle'
    RecycleBoxLayout:
        default_size: None, dp(20)
        default_size_hint: 1, None
        size_hint_y: None
        height: self.minimum_height
        orientation: 'vertical'
''')


class RV(RecycleView):
    def __init__(self, **kwargs):
        super(RV, self).__init__(**kwargs)
        self.data = [{'spalte1_SP': str(x['SP1']), 'spalte2_SP': str(x['SP2']), 'spalte3_SP': str(x['SP3'])} for x in items]


class TestApp(App):
    def build(self):
        return RV()


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

Output