parameters: (self, initial_state)
docstring: StateCache constructor.
  
          Args:
              initial_state: the initial state (nested data)
docstring_summary: StateCache constructor.
docstring_tokens: StateCache constructor .
function: def __init__(self, initial_state):
          """
          StateCache constructor.
  
          Args:
              initial_state: the initial state (nested data)
          """
          self.states = [None] * STATE_CACHE_SIZE  # fill states
          self.current_state_index = 0
          self.num_prev_states = 0
          self.num_next_states = 0
          self.states[0] = initial_state
          self.update_actions()
function_tokens: def __init__ ( self , initial_state ) : self . states = [ None ] * STATE_CACHE_SIZE # fill states self . current_state_index = 0 self . num_prev_states = 0 self . num_next_states = 0 self . states [ 0 ] = initial_state self . update_actions ( )