code: def get_default_settings():
      
      settings = dict()
      settings['gate_shadow'] = True
      settings['lines'] = ({'style': 'very thin', 'double_classical': True,
                            'init_quantum': True, 'double_lines_sep': .04})
      settings['gates'] = ({'HGate': {'width': .5, 'offset': .3, 'pre_offset': .1},
                            'XGate': {'width': .35, 'height': .35, 'offset': .1},
                            'SwapGate': {'width': .35, 'height': .35, 'offset': .1},
                            'Rx': {'width': 1., 'height': .8, 'pre_offset': .2, 'offset': .3},
                            'Ry': {'width': 1., 'height': .8, 'pre_offset': .2, 'offset': .3},
                            'Rz': {'width': 1., 'height': .8, 'pre_offset': .2, 'offset': .3},
                            'EntangleGate': {'width': 1.8, 'offset': .2, 'pre_offset': .2},
                            'DeallocateQubitGate': {'height': .15, 'offset': .2, 'width': .2, 'pre_offset': .1},
                            'AllocateQubitGate': {'height': .15, 'width': .2, 'offset': .1, 'pre_offset': .1,
                                                  'draw_id': False},
                            'MeasureGate': {'width': 0.75, 'offset': .2, 'height': .5, 'pre_offset': .2}})
      settings['control'] = {'size': .1, 'shadow': False}
      return settings
docs: Return the default settings for generating LaTeX circuits.
  
      settings is a dictionary with the following keys:
        gate_shadow: Whether or not to apply shadowing to the gates.
        lines: Settings for the lines.
        gates: Settings for the gates.
        control: Settings for the control symbols.
  
      :return: Default circuit settings
      :rtype: dict