BUG-Notebook-Need-gui.stop()

[vhfgosselin]

Description Under different notebook environments (I tried under jupyter and also watson studio), if I execute a cell containing taipy code, it works but if I decide to rerun the same cell I do get the following error message: ConnectionError Traceback (most recent call last) Input In [3], in <cell line: 15>() 12 value = 10 14 gui = Gui(page) ---> 15 gui.run(ngrok_token="2AfMLycYRW891ajNoVjRvb4muex_6HFojpe17gxbd3Ewgn959")

File ~\anaconda3\envs\new_taipy_11\lib\site-packages\taipy\gui\gui.py:1409, in Gui.run(self, run_server, run_in_thread, ssl_context, **kwargs) 1406 if not run_server: 1407 return self.get_flask_app() -> 1409 return self._server.runWithWS( 1410 host=app_config["host"], 1411 port=app_config["port"], 1412 debug=app_config["debug"], 1413 use_reloader=app_config["use_reloader"], 1414 flask_log=app_config["flask_log"], 1415 run_in_thread=run_in_thread, 1416 ssl_context=ssl_context, 1417 )

File ~\anaconda3\envs\new_taipy_11\lib\site-packages\taipy\gui\server.py:178, in _Server.runWithWS(self, host, port, debug, use_reloader, flask_log, run_in_thread, ssl_context) 176 sock.close() 177 if result == 0: --> 178 raise ConnectionError( 179 f"Port {port} is already opened on {host_value}. You have another server application running on the same port." 180 ) 181 if not flask_log: 182 log = logging.getLogger("werkzeug")

ConnectionError: Port 5000 is already opened on 127.0.0.1. You have another server application running on the same port.

How to reproduce A code fragment

from taipy.gui import Gui, Markdown
from pyngrok import ngrok

page = Markdown("""
# Taipy in a Notebook

Value: <|{value}|>

Set: <|{value}|slider|>
""")
value = 10
gui = Gui(page)
gui.run(ngrok_token="2AfMLycYRW891ajNoVjRvb4muex_6HFojpe17gxbd3Ewgn959")
...

Expected behavior As would have expected no error. The problem doesn't occur if I do execute in the following cell gui.stop() However, in the documentation, it is written that the gui.stop() is only required when for example an on_change() is created after gui.run() in the subsequent cell. May be the way to solve this is simply to clearly state in the documentation, that gui.stop() is also required whenever the user wants to re-execute a cell containing gui.run().

Screenshots When available and relevant, screenshots better help show the problem.

Runtime environment Please specify relevant indications.

• OS: runs from jupyter or watson studio
• Browser: Chrome
• Taipy 1.1 and any other relevant information.

[jrobinAV]

@FabienLelaquais probably for your team :).

[dinhlongviolin1]

I'll handle this

[FredLL-Avaiga]

I guess we could detect that the gui is runnig in gui.run() and execute an implicit gui.stop() in gui.run() ?