code: def __init__(self, dim_x):
      self.dim_x = dim_x
  
      self.I = np.eye(dim_x)
      self.H = 0
      self.x = np.zeros((dim_x, 1))
      self.k = 0
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from math import sqrt
  import matplotlib.pyplot
  import numpy
  from numpy import dot
  import numpy.random
  from scipy.linalg import inv
  from filterpy.gh import GHFilter
  from filterpy.leastsq import LeastSquaresFilter
label_desc: Use image node_id 1 to create a new LSQ object from inherited base classes: object with example: obj = LSQ(dim_x)