code: def setup_method(self):
      self.scalar_funcs = []
      self.line_funcs = []
      self.N = 20
      self.fcount = 0
  
      def bind_index(func, idx):
          # Remember Python's closure semantics!
          return lambda *a, **kw: func(*a, **kw)[idx]
  
      for name in sorted(dir(self)):
          if name.startswith("_scalar_func_"):
              value = getattr(self, name)
              self.scalar_funcs.append(
                  (name, bind_index(value, 0), bind_index(value, 1))
              )
          elif name.startswith("_line_func_"):
              value = getattr(self, name)
              self.line_funcs.append(
                  (name, bind_index(value, 0), bind_index(value, 1))
              )
  
      np.random.seed(1234)
      self.A = np.random.randn(self.N, self.N)
  
imports: from numpy.testing import assert_, assert_equal, assert_array_almost_equal, assert_array_almost_equal_nulp, assert_warns, suppress_warnings
  import scipy.optimize.linesearch
  from scipy.optimize.linesearch import LineSearchWarning
  import numpy
label_desc: Use image node_id 6 for calling the TestLineSearch obj's underlying member method code with example usage: obj.setup_method() and returns: function