code: def __init__(self, parent=None):
      super(Sender, self).__init__(parent)
  
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 Sender object from inherited base classes: QtCore with example: obj = Sender(parent)