code: def __init__(self, *args, **kwds):
      self.hdf5 = None
      self.limit = 10000  # maximum number of samples to be plotted
      pg.PlotCurveItem.__init__(self, *args, **kwds)
  
file_path: pyqtgraph/pyqtgraph/examples/hdf5.py
imports: import os
  import sys
  import h5py
  import numpy
  import pyqtgraph
  from pyqtgraph.Qt import QtWidgets
label_desc: Use image node_id 1 to create a new HDF5Plot object from inherited base classes: pg with example: obj = HDF5Plot()