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QPython’s main features
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You can do most jobs through QPython just like the way that Python does on PC/Laptop.
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Libraries
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-- QPython supports most stardard Python libraries.
-- QPython supports many 3rd Python libraries which implemented with pure Python code.
-- QPython supports some Python libraries mixed with C/C++ code which pre-compiled by QPython develop team.
-- QPython allows you put on the libraries by yourself.
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Besides these, QPython offers some extra features which Python doesn’t offer, Like:
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-- Android APIs Access(Like SMS, GPS, NFC, BLUETOOTH etc)
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Why QPython require so many permissions?
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QPython need these permissions to access Android’s API.
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Runtime modes
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QPython supports several runtime modes for android.
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Console mode
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It’s the default runtime mode in QPython, it’s very common in PC/laptop.
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Kivy mode
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QPython supports Kivy as the GUI programming solution.
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Kivy is an open source Python library for rapid development of applications that make use of innovative user interfaces, such as multi-touch apps.
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Your device should support opengl2.0 for supporting kivy mode.
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By insert into the following header in your script, you can let your script run with kivy mode.
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An kivy program in QPython sample
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#qpy:kivy
-from kivy.app import App
-from kivy.uix.button import Button
-class TestApp(App):
-def build(self):
-return Button(text='Hello World')
-TestApp().run()
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If your library require the opengl driver, you shoule declare the kivy mode header in your script, like the jnius.
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NOTE: QPython3 didn’t support kivy mode yet, we have plan to support it in the future
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WebApp mode
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We recommend you implement WebApp with QPython for it offer the easy to accomplish UI and Take advantage of Python’s fast programming strong point.
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WebApp will start a webview in front, and run a python web service background.
-You could use bottle*(QPython built-in library) to implement the web service, or you could install *django / flask framework also.
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By insert into the following header in your script, you can let your script run with webapp mode.
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#qpy:webapp:<app title>
-#qpy:<fullscreen or remove this line>
-#qpy://<ip:port:path>
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For example
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#qpy:webapp:Hello QPython
-#qpy://localhost:8080/hello
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The previous should start a webview which should load the http://localhost:8080/hello as the default page, and the webview will keep the titlebar which title is “Hello QPython”, if you add the #qpy:fullscreen it will hide the titlebar.
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#qpy:webapp:Hello Qpython
-#qpy://127.0.0.1:8080/
-"""
-This is a sample for qpython webapp
-"""
-from bottle import Bottle, ServerAdapter
-from bottle import run, debug, route, error, static_file, template
-######### QPYTHON WEB SERVER ###############
-class MyWSGIRefServer(ServerAdapter):
-server = None
-def run(self, handler):
-from wsgiref.simple_server import make_server, WSGIRequestHandler
-if self.quiet:
-class QuietHandler(WSGIRequestHandler):
-def log_request(*args, **kw): pass
-self.options['handler_class'] = QuietHandler
-self.server = make_server(self.host, self.port, handler, **self.options)
-self.server.serve_forever()
-def stop(self):
-#sys.stderr.close()
-import threading
-threading.Thread(target=self.server.shutdown).start()
-#self.server.shutdown()
-self.server.server_close() #<--- alternative but causes bad fd exception
-print "# qpyhttpd stop"
-######### BUILT-IN ROUTERS ###############
-@route('/__exit', method=['GET','HEAD'])
-def __exit():
-global server
-server.stop()
-@route('/assets/<filepath:path>')
-def serverstatic(filepath):
-return static_file(filepath, root='/sdcard')
-######### WEBAPP ROUTERS ###############
-@route('/')
-def home():
-return template('<h1>Hello {{name}} !</h1>'+ \
-'<a href="/assets/qpython/projects/WebApp Sample/main.py">View source</a>',name='QPython')
-######### WEBAPP ROUTERS ###############
-app = Bottle()
-app.route('/', method='GET')(home)
-app.route('/__exit', method=['GET','HEAD'])(__exit)
-app.route('/assets/<filepath:path>', method='GET')(serverstatic)
-try:
-server = MyWSGIRefServer(host="127.0.0.1", port="8080")
-app.run(server=server,reloader=False)
-except Exception,ex:
-print "Exception: %s" % repr(ex)
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If you want the webapp could be close when you exit the webview, you have to define the @route(‘/__exit’, method=[‘GET’,’HEAD’]) method , for the qpython will request the http://localhost:8080/__exit when you exit the webview. So you can release other resource in this function.
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Running screenshot
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In the other part of the code, you could implement a webserver whish serve on localhost:8080 and make the URL /hello implement as your webapp’s homepage.
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Q mode
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If you don’t want the QPython display some UI, pelase try to use the QScript mode, it could run a script background, just insert the following header into your script:
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