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I would like to run a QgsTask when I push a button in a Qgis plugin (3.10). My task is a subclass similar to this example

In the main class of my plugin, I have added this (connected to the button that works) :

def myBtnAction(self) :
    from .my_task import MyTask
    task = MyTask('run my task', 20)
    QgsApplication.taskManager().addTask(task)

The task is never executed.

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  • Which qgis 3.10 version are you running? Is it up to date?
    – ndawson
    Commented Jun 26, 2020 at 21:05
  • I use the last version of QGIS LTR, up to date.
    – TrsBar
    Commented Jul 2, 2020 at 7:12
  • Are you sure that it is not executed? Or is its finished method never called maybe?
    – bugmenot123
    Commented Sep 7, 2022 at 13:01

1 Answer 1

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Did you try the standalone version running in PyQGIS Python console like below (clearly borrowed from your link and reindented)?

class MyTask(QgsTask):
    def __init__(self, description, flags):
        super().__init__(description, flags)
    def run(self):
        QgsMessageLog.logMessage('Started task {}'.format(self.description()))
        #print('crashandburn')
        return True

t1 = MyTask('waste cpu', QgsTask.CanCancel)
QgsApplication.taskManager().addTask(t1)

In my case, it "works". So what does MyTask from your from .my_task import MyTask looks like? Did you try to use your task code outside the plugin to find where the issue could be?

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  • Yes, the code works well in the python console, no problem. Nothing blocking i've tested on a new plugin from scratch to be sure that the problem doesn't come from my code.
    – TrsBar
    Commented Jun 18, 2020 at 10:14

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