code: def extract_lsq_problems():
      """Extract all least squares problems in this file for benchmarking.
  
      Returns
      -------
      dict, str -> LSQBenchmarkProblem
          The key is a problem name.
          The value is an instance of LSQBenchmarkProblem.
      """
      problems = {}
      for name, problem_class in inspect.getmembers(
          sys.modules[__name__], inspect.isclass
      ):
          if (
              name != "LSQBenchmarkProblem"
              and issubclass(problem_class, LSQBenchmarkProblem)
              and hasattr(problem_class, "INITIAL_GUESSES")
          ):
              for i, x0 in enumerate(problem_class.INITIAL_GUESSES):
                  if len(problem_class.INITIAL_GUESSES) > 1:
                      key_name = f"{name}_{i}"
                  else:
                      key_name = name
                  problems[key_name] = problem_class(x0)
      return problems
  
imports: import inspect
  import sys
  import numpy
  from numpy.polynomial.chebyshev import Chebyshev
  from scipy.integrate import odeint
label_desc: Use image node_id 1 for calling a global function with example usage: extract_lsq_problems() and returns: problems