Very simple Qwt dockable widget with PyQt.

gistfile1.py

from guidata.qt.QtGui import QWidget, QMainWindow, QVBoxLayout, qApp
from guidata.qtwidgets import DockableWidget
from guidata.qt.QtCore import Qt, QThread
from guiqwt.plot import CurveWidget, CurvePlot
from guiqwt.builder import make
from guiqwt.config import _
  
APP_NAME = _("Very simple Qwt dockable widget with PyQt")
 
class DockablePlotWidget( DockableWidget ):
    LOCATION = Qt.RightDockWidgetArea
    def __init__(self, parent, plotwidgetclass, toolbar = None):
        super(DockablePlotWidget, self).__init__(parent)
        self.toolbar = toolbar
        layout = QVBoxLayout()
        self.plotwidget = plotwidgetclass()
        layout.addWidget(self.plotwidget)
        self.setLayout(layout)

    def get_plot(self):
        return self.plotwidget.plot
 
class MainWindow(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        # Allow dockable widgets to be side by side
        self.setDockOptions(QMainWindow.AnimatedDocks | QMainWindow.AllowNestedDocks)

        self.curvewidget = DockablePlotWidget(self, CurveWidget)
        self.curvewidget2 = DockablePlotWidget(self, CurveWidget)
        self.curveplot = self.curvewidget.get_plot()
 
        #x, y = self.sampleData()
        #self.valueCurve= make.curve(x,y,'b-')
        #self.curveplot.add_item(self.valueCurve)
 
        # Add the DockWidget to the main window
        self.curve_dock = self.add_dockwidget( self.curvewidget, _("Curve plotting panel") )        
        self.curve_dock2 = self.add_dockwidget( self.curvewidget2, _("Curve plotting panel2") ) 
 
        self.show()
        # After this call the widget will be visually in front of any 
        # overlapping sibling widgets.
        self.curve_dock.raise_()
 
     #------GUI refresh/setup
    def add_dockwidget(self, child, title):
        """Add QDockWidget and toggleViewAction"""
        dockwidget, location = child.create_dockwidget(title)
        self.addDockWidget(location, dockwidget)
        return dockwidget
 
 
def run():
    from guidata import qapplication
    app = qapplication()
    window = MainWindow()
    window.show()
    app.exec_()
 
if __name__ == "__main__":
    run()