class_docstr: Fits a GP by tuning the kernel hyper-params. 
docstr: Preprocesses the structural and mislabel coefficients. 
docstr_tok: ["Preprocesses","the","structural","and","mislabel","coefficients","."]
code: def _preprocess_struct_mislabel_coeffs(self):
      """Preprocesses the structural and mislabel coefficients."""
      if self.options.choose_mislabel_struct_coeffs == "tune_coeffs":
          # If they are integers or floats
          self.num_mislabel_struct_coeffs = 1
          self.to_tune_mislabel_struct_coeffs = True
      elif (
          isinstance(self.options.mislabel_coeffs, list)
          and isinstance(self.options.struct_coeffs, list)
      ) or (
          isinstance(self.options.mislabel_coeffs, str)
          and isinstance(self.options.struct_coeffs, str)
      ):
          # If they are lists or strings
          if isinstance(self.options.mislabel_coeffs, str):
              # If they are strings, obtain the lists
              self.mislabel_coeffs = [
                  float(x)
                  for x in self.options.mislabel_coeffs.split("-")
              ]
              self.struct_coeffs = [
                  float(x)
                  for x in self.options.struct_coeffs.split("-")
              ]
          else:
              self.mislabel_coeffs = self.options.mislabel_coeffs
              self.struct_coeffs = self.options.struct_coeffs
          # Store other parameters
          self.num_mislabel_struct_coeffs = len(self.mislabel_coeffs)
          self.to_tune_mislabel_struct_coeffs = False
          # Check if the lengths are the same
          if len(self.mislabel_coeffs) != len(self.struct_coeffs):
              raise ValueError(
                  "Length of mislabel and structural coefficients must be same."
                  + "Given: mislabel: %s (%d), struct:%s (%d)."
                  % (
                      str(self.options.mislabel_coeffs),
                      len(self.mislabel_coeffs),
                      str(self.options.struct_coeffs),
                      len(self.struct_coeffs),
                  )
              )
      else:
          raise ValueError(
              "Bad format for mislabel and structural coefficients."
              + "Given: mislabel: %s, struct:%s."
              % (
                  str(self.options.mislabel_coeffs),
                  str(self.options.struct_coeffs),
              )
          )
  
imports: import numpy
  from .None import otmann
  from ..gp import gp_core
  from ..utils.ancillary_utils import get_list_of_floats_as_str
  from ..utils.reporters import get_reporter
  from ..utils.option_handler import get_option_specs, load_options
label_desc: Use image node_id 3 for calling the NNGPFitter obj's underlying member method code with example usage: obj._preprocess_struct_mislabel_coeffs() without return types