#!/usr/bin/env python3

import sys
from PySide2.QtWidgets import QApplication
from PySide2.QtDataVisualization import QtDataVisualization

if _name_ == '_main_':
  app = QApplication([])
  bars = QtDataVisualization.Q3DBars()
  series = QtDataVisualization.QBar3DSeries()
  d = [QtDataVisualization.QBarDataItem(v) for v in [1.0, 7.5, 5.0, 2.2]]


  series.dataProxy().addRow(d)  # segfault
  bars.addSeries(series)
  bars.show()
  sys.exit(app.exec_())

series.dataProxy().addRows([d])