問題描述

我有一個燒瓶應用程序作為服務器，我有一個 kivy 應用程序作為服務器的前端.如何運行燒瓶然后運行 ??kivy 應用程序以便它們同時協同工作?

I have a flask app serving as a server and I have a kivy app serving as a front end to a server. How can I run flask and then kivy app so they work together at the same time?

Flask 應用:

from flask import Flask

app = Flask(__name__)


@app.route('/')
def hello():
    return 'Hello'

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

Kivy 應用:

from kivy.app import App
from kivy.builder import Builder
from kivy.uix.screenmanager import Screen, ScreenManager
kivy.require('1.10.0')

Builder.load_file('kivy.kv')

sm = ScreenManager()

class MainScreen(Screen)
    pass

class OtherScreen(Screen)
    pass

sm.add_widget(MainScreen(name='main'))
sm.add_widget(OtherScreen(name='other'))

class MyApp(App):
    def build(self):
        return sm


MyApp().run()

更新:如果有人在使用 apache 實現網絡服務器時遇到問題，請嘗試 docker，我認為這是一種更簡單、更快的解決方案！

Update: If someone is having problems implementing a webserver with apache, try docker, simpler and faster solution, in my opinion!

推薦答案

我想讓 Flask 連續運行.我嘗試了建議的解決方案，按照@amanb 的建議將它們作為線程一起運行.我發現 Flask 正在阻塞 Kivy，反之亦然，無論線程的時間安排或排列方式如何.原因是解釋器的 GIL.因此，我嘗試了流程，似乎它確實有效.

I wanted Flask to run continuously. I tried the proposed solution to run them together as threads as suggested by @amanb. I found out Flask is blocking Kivy and vice versa no matter the timing or how arranged are the threads. The reason being the interpreter's GIL. Therefore I tried with processes and it seems it does the work.

代碼

#!/usr/bin/python2.7 python2.7
# -*- coding: utf-8 -*-

# kivy modules first, if not Kivy may cause problems
import kivy
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.label import Label
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.screenmanager import ScreenManager, Screen
kivy.require('1.10.0')


# common modules
import sys
import signal
from multiprocessing import Process


# Flask & similar modules
from flask import Flask
from flask_restful import reqparse, abort, Api, Resource
import eventlet
from eventlet import wsgi


# async server setup
app = Flask(__name__)
api = Api(app)


def start_Flask():
    print("Starting server...")
    # start an eventlet WSGI server on port 5000
    wsgi.server(eventlet.listen(('', 5000)), app)     


def signal_handler(signal, frame):
    # for fetching CTRL+C and relatives
    print " CTRL + C detected, exiting ... "
    exit(1)


# Kivy screen class
class MainScreen(Screen):
    def __init__(self, **kwargs):
        self.name="MAIN SCREEN"
        super(Screen, self).__init__(**kwargs)


# Kivy app class
class Kivy(App):
    w_MessageBox10_1 = "MAIN SCREEN"
    w_MessageBox10_2 = "One golden glance of what should be"
    w_MessageBox30_2 = "CHORUS"
    w_MessageBox30_3 = "EXIT"


    # exit button action   
    def exit(self):
        print "exiting... one shaft of light will show the way..."
        p1.terminate()  # terminate Flask by pressing on cancel
        exit(1)


    # do magic button action
    def do_magic(self):
        # your code goes here or maybe not
        print "***** it's a kind of magic *************************"


    # Kivy UI builder file
    def build(self):
        sm = Builder.load_string("""

ScreenManager
    MainScreen:
        size_hint: 1, .7
        auto_dismiss: False
        title: app.w_MessageBox10_1       
        title_align: "center"

        BoxLayout:
            orientation: "vertical"
            Label:
                text: app.w_MessageBox10_2
            BoxLayout:
                orientation: "horizontal"
                spacing: 10
                size_hint: 1, .5
                Button:
                    text: app.w_MessageBox30_2  # DO MAGIC
                    on_press:
                        app.do_magic()
                Button:
                    text: app.w_MessageBox30_3  # EXIT
                    on_press:
                        app.exit()


        """)

        return sm


if __name__ == '__main__':    

    # #CTRL+C signal handler
    signal.signal(signal.SIGINT, signal_handler)
    signal.signal(signal.SIGTERM, signal_handler)

    global p1
    p1 = Process(target=start_Flask)    # assign Flask to a process
    p1.start()                          # run Flask as process
    Kivy().run()                        # run Kivy UI

更新要通過在 Kivy 中按下按鈕來按需運行 Flask，我使用下面的腳本.

UPDATE To run Flask on demand by pressing a button in Kivy I use the script below.

#!/usr/bin/python2.7 python2.7
# -*- coding: utf-8 -*-

# kivy modules first, if not Kivy may cause problems
import kivy
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.label import Label
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.screenmanager import ScreenManager, Screen
kivy.require('1.10.0')

# common modules
import sys
import os
import time
import signal
from multiprocessing import Process

# Flask modules
from flask import Flask

# wsgi (Web Server Gateway Interface) modules
import eventlet
from eventlet import wsgi

# async server setup
app = Flask(__name__)

def signal_handler(signal, frame):
    print " CTRL + C detected, exiting ... "
    exit(0)


# kivy gui classes ######################################################     
class MainScreen(Screen):
    def __init__(self, **kwargs):
        self.name="MAIN SCREEN"
        super(Screen, self).__init__(**kwargs)

class MainApp(App):
    MainScreenTitle = "MainScreen title"
    MainScreenLabel = "MainScreen label"
    MessageButtonEnter = "START"
    MessageButtonExit = "EXIT"

    def start_Flask(self):
        print("Starting Flask...")
        wsgi.server(eventlet.listen(('', 5000)), app)     # deploy as an eventlet WSGI server

    def stop(self):
        print "terminating Flask and exiting..."
        global p1
        p1.terminate()
        exit(1)

    def start(self):
        print "starting Flask as process..."
        global p1
        p1 = Process(target=self.start_Flask) # assign Flask to a process
        p1.daemon = True
        p1.start()  #launch Flask as separate process

    def build(self):
        sm = Builder.load_string("""

ScreenManager
    MainScreen:
        size_hint: 1, .7
        auto_dismiss: False
        title: app.MainScreenTitle       
        title_align: "center"

        BoxLayout:
            orientation: "vertical"
            Label:
                text: app.MainScreenLabel
            BoxLayout:
                orientation: "horizontal"
                spacing: 10
                size_hint: 1, .5
                Button:
                    text: app.MessageButtonEnter  # start app
                    on_press:
                        app.start()
                Button:
                    text: app.MessageButtonExit  # exit app
                    on_press:
                        app.stop()

        """)

        return sm


# main ################################################
if __name__ == '__main__':

    #CTRL+C signal handler
    signal.signal(signal.SIGINT, signal_handler)
    signal.signal(signal.SIGTERM, signal_handler)

    MainApp().run()   # run Kivy app

這篇關于如何同時運行 kivy 和燒瓶應用程序?的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！