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I have a Qt plugin, and i have a button browse_btn to browse for an output folder. I use the QFileDialog.getExistingDirectory function and it all works fine. However if I close the plugin and open it again, then click the pushbutton to add a path, the opened window for choosing the path will re-open after I choose a path or close it. If I close the plugin a open it again the 'choose path' window will reopen 3 time and so on...

The similar problem is still open here and in comments here and probably solved here, but since there is no code provided I cannot apply it to solve my problem.

The exact code is following:

self.dlg.browse_btn.clicked.connect(self.set_output)

def set_output(self):
    folder_path = str(QFileDialog.getExistingDirectory(self.dlg, u"Pick a folder"))
    if not folder_path:
        return None

I think this happens because each time I open-close the plugin the separate connection is created with self.dlg.browse_btn.clicked.connect(self.set_output), and it only disconnects after I relaunch QGIS or use Plugin Reloader

Basile
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    My guess is you would need to disconnect the signal when closing your plugin. If you built your plugin using the Plugin Builder, there should be a onClosePlugin() function inside your main python file (i.e. pluginName.py). Here you should disconnect your function using self.dlg.browse_btn.clicked.disconnect(self.set_output). – Joseph Aug 07 '17 at 09:12

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