On 2019-09-01 21:02, Spencer Du wrote:
Hi
I have code for GUI and MQTT. In GUI.py I have "def loadGUI" which loads up a
GUI file if the file exists in current directory. I want to add the file name to a list
when a file is imported and for each subsequent file that is imported I want the file
name to be imported to the same list and print the list or create a new list but with the
imported file named added to list which has the existing file names that have already
been imported. I was wondering how I do this. By the way run GUI.py to test this and
test1.py and test2.py are the files which can be used to import GUI .
GUI.py
[snip]
import json
[snip]
def loadGUI(self):
print("Searching file", self.fileName_UI)
try:
module = __import__(self.fileName_UI)
my_class = getattr(module, "SubWindow")
sub = QMdiSubWindow()
sub.setWidget(my_class())
sub.setWindowTitle("New GUI: " + self.fileName_UI)
self.mdi.addSubWindow(sub)
sub.show()
print("creating new instance " + self.fileName_UI)
client = device("Device")
client.run()
client.loop_start() # start the loop
device_message = self.fileName_UI
time.sleep(2)
print("Subscribing to topic",
"microscope/light_sheet_microscope/UI")
client.subscribe("microscope/light_sheet_microscope/UI")
print("Publishing message to topic",
"microscope/light_sheet_microscope/UI")
client.publish("microscope/light_sheet_microscope/UI", json.dumps({"type": "device",
"payload":{"name": self.fileName_UI, "cmd": "adding device"}}, indent=2))
time.sleep(1) # wait
client.loop_stop() # stop the loop
print("Device added" + "\n")
This is a local name, local to the method.
listofdevice = []
listofdevice.append(self.fileName_UI)
print(listofdevice)
You could store the list in a file: read the current list from the file
and then write the modified list to the file. The file won't exist
initially, so you can treat that as the list being empty.
You're already importing the json module, so you could read/write it as
JSON.
Also, _don't_ use a "bare" except like here:
except:
because catches _all_ exceptions. Instead, catch only those you're
prepared to handle.
[snip]
--
https://mail.python.org/mailman/listinfo/python-list
