帶滑塊的GRC QT GUI范圍出現錯誤

使用GNU無線電伴侶3.9.4.0。

我的應用程序有一個“QT GUI范圍”塊。當小部件設置為“計數器+滑塊”時，我會得到錯誤

TypeError: setRange(self, int, int): argument 2 has unexpected type 'float'

此條件的Python代碼為，

self._rf_gain_win = RangeWidget(self._rf_gain_range, self.set_rf_gain, "RF Gain", "counter_slider", float, QtCore.Qt.Horizontal)

當小部件設置為“計數器”時，沒有錯誤。現在同樣的Python線是，

self._rf_gain_win = RangeWidget(self._rf_gain_range, self.set_rf_gain, "RF Gain", "counter", float, QtCore.Qt.Horizontal)

如何使用所需的滑塊？

= = =

完整的錯誤消息是：

File "C:\Users\User1\Documents\Records\Software Defined Radio - SDR\GNU Radio\Flowgraphs\HackADay Tutorials\Video 02\Simple_AM_Rx_01_temp.py", line 100, in __init__
    self._rf_gain_win = RangeWidget(self._rf_gain_range, self.set_rf_gain, "RF Gain", "counter_slider", float, QtCore.Qt.Horizontal)
  File "C:\Users\User1\miniforge3\envs\gnuradio\lib\site-packages\gnuradio\qtgui\range.py", line 121, in __init__
    self.d_widget = self.CounterSlider(self, self.range, self.notifyChanged, rangeType, orientation)
  File "C:\Users\User1\miniforge3\envs\gnuradio\lib\site-packages\gnuradio\qtgui\range.py", line 262, in __init__
    self.slider = RangeWidget.Slider(parent, ranges, self.sliderChanged, rangeType, orientation)
  File "C:\Users\User1\miniforge3\envs\gnuradio\lib\site-packages\gnuradio\qtgui\range.py", line 161, in __init__
    self.setRange(0, ranges.nsteps - 1)
TypeError: setRange(self, int, int): argument 2 has unexpected type 'float'