如何从另一个.py文件运行python脚本并在当前窗口中显示

Question

menu.py

from kivy.app import App
from kivy.uix.dropdown import DropDown
from kivy.lang import Builder


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


kv_str = Builder.load_string('''


BoxLayout:
    orientation: 'vertical'
    BoxLayout:
        canvas.before:
            Rectangle:
                pos: self.pos
                size: self.size
            Color:
                rgb: (1,1,1)
        size_hint_y:1

        Button:
            id: btn
            text: 'user'
            on_release: dropdown.open(self)
            #size_hint_y: None
            #height: '48dp'  


        CustDrop:

            id: dropdown

            Button:
                text: 'List User'
                size_hint_y: None
                height: '48dp'

        Label:
            size_hint_x: 4

    Label:
        size_hint_y: 9

''')


class ExampleApp(App):
    def build(self):
        return kv_str

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

user.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.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



Window.size = (500, 500)

#con = lite.connect('user.db')
#con.text_factory = str
#cur = con.cursor()


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,*args):
        popup = TextInputPopup(self)
        popup.open()

    def update_changes(self):
        self.text = txt


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

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

    def get_users(self):

        # cur.execute("SELECT * FROM `users` order by id asc")
        # rows = cur.fetchall()

        rows = [(1, 'Yash', 'Chopra'),(2, 'amit', 'Kumar')]

        for row in rows:
            for col in row:
                self.data_items.append(col)


class ListUser(App):
    title = "Users"

    def build(self):
        self.root = Builder.load_file('user.kv')
        return RV()



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

user.kv

#:kivy 1.10.0

<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: 3

            Label:
                text: "ID"
            Label:
                text: "First Name"
            Label:
                text: "Last Name"

        BoxLayout:
            RecycleView:
                viewclass: 'SelectableButton'
                data: [{'text': str(x)} for x in root.data_items]
                SelectableRecycleGridLayout:
                    cols: 3
                    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

我有两个文件menu.py和user.py。 menu.py文件显示菜单，而user.py显示用户列表。
当我运行menu.py然后在顶部显示用户菜单。当我单击用户时，'列表用户'显示（用户的子菜单）。当我单击'列表用户'时，用户列表应显示在当前窗口中。菜单将是顶部和用户列表显示在同一窗口（在菜单下）。

Answer 1

要在同一窗口中显示用户列表，请将Python脚本和kv文件合并为一个。 有关详细信息，请参见以下示例。

例

主菜单

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.dropdown import DropDown

from kivy.properties import BooleanProperty, ListProperty, StringProperty, ObjectProperty
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
import sqlite3 as lite

dbPath = "/home/iam/dev/SQLite/sampleDB/ChinookDB/"
#con = lite.connect('user.db')
con = lite.connect(dbPath + "chinook.db")
#con.text_factory = str
cur = con.cursor()


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

    def __init__(self, obj, **kwargs):
        super(MessageBox, 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 = MessageBox(self)
        popup.open()

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


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

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

    def get_users(self):
        cur.execute("SELECT CustomerId, FirstName, LastName FROM 'customers' order by CustomerId asc")
        rows = cur.fetchall()

        for row in rows:
            for col in row:
                self.data_items.append(col)


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


class MainMenu(BoxLayout):
    users = ObjectProperty(None)
    dropdown = ObjectProperty(None)

    def display_users(self):
        # rv = RV()
        self.dropdown.dismiss()
        self.users.add_widget(RV())


class MainMenuApp(App):
    title = "Example"

    def build(self):
        return MainMenu()


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

主菜单

#:kivy 1.10.0

<MessageBox>:
    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: 3

            Label:
                text: "ID"
            Label:
                text: "First Name"
            Label:
                text: "Last Name"

        BoxLayout:
            RecycleView:
                viewclass: 'SelectableButton'
                data: [{'text': str(x)} for x in root.data_items]
                SelectableRecycleGridLayout:
                    cols: 3
                    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

<MainMenu>:
    users: users
    dropdown: dropdown

    orientation: 'vertical'
    BoxLayout:
        canvas.before:
            Rectangle:
                pos: self.pos
                size: self.size
            Color:
                rgb: (1,1,1)
        size_hint_y:1

        Button:
            id: btn
            text: 'user'
            on_release: dropdown.open(self)

        CustDrop:
            id: dropdown

            Button:
                text: 'List User'
                size_hint_y: None
                height: '48dp'
                on_release: root.display_users()

        Label:
            size_hint_x: 4
            text: "label 1"

    BoxLayout:
        id: users
        size_hint_y: 9

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