code: def __init__(self, parent=None):
      super(Receiver, self).__init__(parent)
      self.counter = 0
  
file_path: pyqtgraph/tests/test_signalproxy.py
imports: import pytest
  from pyqtgraph import SignalProxy
  from pyqtgraph.Qt import QtCore, mkQApp
label_desc: Use image node_id 1 to create a new Receiver object from inherited base classes: QtCore with example: obj = Receiver(parent)