code: def load(self):
      self.load_csv()
      self.update_source_and_signals()
  
file_path: coach/rl_coach/dashboard_components/signals_file_base.py
imports: import numpy
  from bokeh.models import ColumnDataSource
  from rl_coach.dashboard_components.signals import Signal
  from rl_coach.dashboard_components.globals import x_axis, x_axis_options, show_spinner
label_desc: Use image node_id 6 for calling the SignalsFileBase obj's underlying member method code with example usage: obj.load() without return types