code: def _get_coef(self):
      idxs = np.arange(len(self.model.params))
      return (
          self.model.params[idxs != self.const_idx]
          if self.model.k_constant
          else self.model.params
      )
  
imports: import math
  import numpy
  from m2cgen import ast
  from m2cgen.assemblers import utils
  from m2cgen.assemblers.base import ModelAssembler
label_desc: Use image node_id 3 for calling the StatsmodelsLinearModelAssembler obj's underlying member method code with example usage: obj._get_coef() and returns: unknown