[Python] How can I remove the dotted border around the tab in focus in a multi-tabbed PyQt5...

I have built a multi-tab window using PyQt5. Each tab has a thin dotted border when in focus:



How do I remove this dotted border? (My operating system is Window 10 if that matters.)

Here is the Python code that generates the above window:

from PyQt5.QtWidgets import QTabWidget, QWidget, QVBoxLayout, QApplication
import matplotlib.pyplot as plt
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg
from numpy.random import rand
from sys import argv, exit

class mainWindow(QTabWidget):
def __init__(self, parent = None):
super(mainWindow, self).__init__(parent)

# Create tab1
self.tab1 = QWidget()
self.addTab(self.tab1,"Tab 1")
self.figure = plt.figure()
self.canvas = FigureCanvasQTAgg(self.figure)
layout = QVBoxLayout()
layout.addWidget(self.canvas)
self.tab1.setLayout(layout)
self.plot()

# Create tab2
self.tab2 = QWidget()
self.addTab(self.tab2,"Tab 2")
self.figure = plt.figure()
self.canvas = FigureCanvasQTAgg(self.figure)
layout = QVBoxLayout()
layout.addWidget(self.canvas)
self.tab2.setLayout(layout)
self.plot()

def plot(self):
data = rand(10)
ax = self.figure.add_subplot(111)
ax.plot(data, '*-')
self.canvas.draw()

app = QApplication(argv)
main = mainWindow()
main.show()
exit(app.exec_())


Several Stack Overflow questions like this, this, and this one seem to suggest that the border might be removed by adding a line like

self.tab1.setFocusPolicy(QtCore.Qt.NoFocus)


or

self.tab1.setStyleSheet("QTableView:{outline: 0;}")


somewhere in the above code. However, I have not yet found a way to do this that succeeds in removing the dotted border.

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