code: def __init__(self, freq, **kwargs):
      kwargs["duty_cycle"] = 0.5
      super(Square, self).__init__(freq, **kwargs)
  
imports: import math
  import array
  import itertools
  import random
  from .audio_segment import AudioSegment
  from .utils import db_to_float, get_frame_width, get_array_type, get_min_max_value
label_desc: Use image node_id 1 to create a new Square object from inherited base classes: Pulse with example: obj = Square(freq)