code: def enumerate_states(*args, **options):
      """
      Returns instances of the given state with dummy indices appended
  
      Operates in two different modes:
  
      1. Two arguments are passed to it. The first is the base state which is to
         be indexed, and the second argument is a list of indices to append.
  
      2. Three arguments are passed. The first is again the base state to be
         indexed. The second is the start index for counting.  The final argument
         is the number of kets you wish to receive.
  
      Tries to call state._enumerate_state. If this fails, returns an empty list
  
      Parameters
      ==========
  
      args : list
          See list of operation modes above for explanation
  
      Examples
      ========
  
      >>> from sympy.physics.quantum.cartesian import XBra, XKet
      >>> from sympy.physics.quantum.represent import enumerate_states
      >>> test = XKet('foo')
      >>> enumerate_states(test, 1, 3)
      [|foo_1>, |foo_2>, |foo_3>]
      >>> test2 = XBra('bar')
      >>> enumerate_states(test2, [4, 5, 10])
      [<bar_4|, <bar_5|, <bar_10|]
  
      """
  
      state = args[0]
  
      if len(args) not in (2, 3):
          raise NotImplementedError("Wrong number of arguments!")
  
      if not isinstance(state, StateBase):
          raise TypeError("First argument is not a state!")
  
      if len(args) == 3:
          num_states = args[2]
          options["start_index"] = args[1]
      else:
          num_states = len(args[1])
          options["index_list"] = args[1]
  
      try:
          ret = state._enumerate_state(num_states, **options)
      except NotImplementedError:
          ret = []
  
      return ret
  
imports: from sympy.core.add import Add
  from sympy.core.expr import Expr
  from sympy.core.mul import Mul
  from sympy.core.numbers import I
  from sympy.core.power import Pow
  from sympy.integrals.integrals import integrate
  from sympy.physics.quantum.dagger import Dagger
  from sympy.physics.quantum.commutator import Commutator
  from sympy.physics.quantum.anticommutator import AntiCommutator
  from sympy.physics.quantum.innerproduct import InnerProduct
  from sympy.physics.quantum.qexpr import QExpr
  from sympy.physics.quantum.tensorproduct import TensorProduct
  from sympy.physics.quantum.matrixutils import flatten_scalar
  from sympy.physics.quantum.state import KetBase, BraBase, StateBase
  from sympy.physics.quantum.operator import Operator, OuterProduct
  from sympy.physics.quantum.qapply import qapply
  from sympy.physics.quantum.operatorset import operators_to_state, state_to_operators
label_desc: Use image node_id 8 for calling a global function with example usage: enumerate_states() and returns: ret