title: Button for duplicating tabs in a QTabWidget
body: <p>I have a program that uses an input tab with multiple entry boxes for a user to fill out, and when those entry boxes are filled in, I hit run and another program will run the data entered. I'd like for my program to have a tab button with a plus sign that will duplicate the tabs dynamically so that I can run multiple instances. I'd like for each tab to use the same name, but have a variant at the end - e.g. "EntryBox0", "EntryBox1", "EntryBox2".</p>
  
  <p>Is there an easy way to do this, while keeping the formatting (widget positions) the same in all tabs?  </p>
  
  <p>My first thought was to code the multiple tabs manually and have a hide/unhide button for each tab, however that would be a lot more code. </p>
  
  <p><img src="https://i.stack.imgur.com/d2B6O.png" alt="enter image description here"></p>
  
  <p>I'd like to add the + sign next to "Tab 2". All of the tabs will identical. The widgets will have same name, but have a dynamic number at the end to identify which tab is being used.</p>
  
  <hr>
  
  <pre><code>from Stage import Ui_Form
  from Tabs import Ui_TabPage
  
  class TabPage(QWidget, Ui_TabPage):
      def __init__(self, parent=None):
          super().__init__(parent)
          self.setupUi(self)
  
  class Stage(QMainWindow, Ui_Form):
      def __init__(self, parent=None):
          super().__init__(parent)
          self.setupUi(self)
          button = QtWidgets.QToolButton()
          button.setToolTip('Add New Tab')
          button.clicked.connect(self.addNewTab)
          button.setIcon(self.style().standardIcon(
              QtWidgets.QStyle.SP_DialogYesButton))
          self.tabWidget.setCornerWidget(button, QtCore.Qt.TopRightCorner)
          self.addNewTab()
  
      def addNewTab(self):
          text = 'Tab %d' % (self.tabWidget.count() + 1)
          self.tabWidget.addTab(TabPage(self.tabWidget), text)
  
  if __name__ == '__main__':
  
      app = QtWidgets.QApplication(sys.argv)
      window = Stage()
      window.setGeometry(600, 100, 300, 200)
      window.show()
      sys.exit(app.exec_())
  </code></pre>