code: def perm_symmetry(self, i_s, x_parents, xi):
      # TODO: Cut out of for if outside linear constraint cutting planes
      xi_t = tuple(xi)
      xi2 = copy.copy(xi)
      xi2[i_s] = 1
      # Make new vertex list a hashable tuple
      xi2_t = tuple(xi2)
      # Append to cell
      self.C0.add_vertex(self.V[xi2_t])
      # Connect neighbors and vice versa
      # Parent point
      self.V[xi2_t].connect(self.V[xi_t])
  
      # Connect all family of simplices in parent containers
      for x_ip in x_parents:
          self.V[xi2_t].connect(self.V[x_ip])
  
      x_parents2 = copy.copy(x_parents)
      x_parents2.append(xi_t)
  
      i_s += 1
      if i_s == self.dim:
          return
      # Permutate
      self.perm_symmetry(i_s, x_parents2, xi2)
  
imports: import numpy
  import copy
label_desc: Use image node_id 5 for calling the Complex obj's underlying member method code with example usage: obj.perm_symmetry(i_s, x_parents, xi) without return types