# Snake_ladder game using doubly linked list class Empty(Exception): """ Error attempting to access an element from an empty container.""" pass class DoublyLinkedBase: """Queue implementation using circularly linked list for storage.""" # -------------------------- nested Node class -------------------------- class _Node: """ Lightweight, nonpublic class for storing a doubly linked node. """ __slots__ = '_element', '_prev', '_next' # streamline memory usage def __init__(self, element, prev, next): # initialize node’s fields self._element = element # reference to user’s element self._prev = prev # previous node reference self._next = next # next node reference # ------------------------------- methods ------------------------------- def __init__(self): """ Create an empty list.""" self._header = self._Node(None, None, None) self._trailer = self._Node(None, None, None) self._header._next = self._trailer # trailer is after header self._trailer._prev = self._header # header is before trailer self._size = 0 # number of elements def __len__(self): """Return the number of elements in the list.""" return self._size def is_empty(self): """Return True if list is empty.""" return self._size == 0 def insert_between(self, e, predecessor, successor): """Add element e between two existing nodes and return new node.""" newest = self._Node(e, predecessor, successor) # linked to neighbors predecessor._next = newest successor._prev = newest self._size += 1 return newest def delete_node(self, node): """ Delete nonsentinel node from the list and return its element.""" predecessor = node._prev successor = node._next predecessor._next = successor successor._prev = predecessor self._size -= 1 element = node._element # record deleted element node._prev = node._next = node._element = None # deprecate node return element # return deleted element def display_board(self): current = self._header._next while current != self._trailer: print(current._element, end=" ") current = current._next print() def dice_roll_sequance(self, case): # not a random sequance if case == 1: self._dice_seq = [1, 5, 3] # 84 self.move_() print("case %d, ans = 84" % case) if case == 2: self._dice_seq = [4, 3, 6, 1] # 38 self.move_() print("case %d, ans = 38" % case) if case == 3: self._dice_seq = [5, 2, 6, 6, 3, 6, 5, 5] # 100 win self.move_() print("case %d, ans = 100 win" % case) if case == 4: self._dice_seq = [5, 2, 6, 6, 3, 6, 5, 1] # 61 self.move_() print("case %d, ans = 61 " % case) if case == 5: self._dice_seq = [5, 2, 6, 6, 3, 6, 5, 6] # 95 self.move_() print("case %d, ans = 95" % case) if case == 6: self._dice_seq = [1] # 38 self.move_() print("case %d, ans = 38" % case) if case == 7: self._dice_seq = [6, 1, 2] # 5 self.move_() print("case %d, ans = 5" % case) if case == 8: self._dice_seq = [6, 1, 2, 3] # 31 self.move_() print("case %d, ans = 31" % case) if case == 9: self._dice_seq = [1, 6, 6, 1, 6, 2] # 99 self.move_() print("case %d, ans =99" % case) def inistialize_board(self): for i in range(1, 101): if i == 2: self.insert_last(i, 36) elif i == 8: self.insert_last(i, 23) elif i == 17: self.insert_last(i, 6) elif i == 21: self.insert_last(i, 21) elif i == 33: self.insert_last(i, -28) elif i == 46: self.insert_last(i, 38) elif i == 51: self.insert_last(i, 16) elif i == 54: self.insert_last(i, -20) elif i == 63: self.insert_last(i, -47) elif i == 69: self.insert_last(i, i + 2) elif i == 71: self.insert_last(i, 20) elif i == 75: self.insert_last(i, 5) elif i == 80: self.insert_last(i, 19) elif i == 93: self.insert_last(i, -19) elif i == 96: self.insert_last(i, 1) elif i == 97: self.insert_last(i, -36) else: self.insert_last(i, 0) def move_(self): current = self._header or self._trailer if current is not None: for roll in self._dice_seq: for _ in range(roll): if current._next is not None and current._next._element is not None and current._next != self._trailer: current = current._next print("Moved to square", current._element) else: break if current is not None and current != self._trailer: self._header = current print("Current position:", current._element) else: print("Current position: None") else: print("Current position: None") def check_win(self): return self._header._element == 100 # Add this method inside the DoublyLinkedBase class def insert_last(self, square_id, move_shift): current = self._header._next while current: if current._element == square_id: current._element += move_shift # Ensure the circular behavior if current._element > 100: current._element = 200 - current._element print("Moved to square", current._element) self._header = current return current = current._next # Main dirver dl = DoublyLinkedBase() dl.inistialize_board() dl.display_board() for i in range(1, 10): dl.dice_roll_sequance(i)
Lo que he probado:
¿Qué modificación hago para que no imprima ninguno? (la lista enlazada de códigos)
La salida :
Current position: None case 1, ans = 84 Current position: None case 2, ans = 38 Current position: None case 3, ans = 100 win Current position: None case 4, ans = 61 Current position: None case 5, ans = 95 Current position: None case 6, ans = 38 Current position: None case 7, ans = 5 Current position: None case 8, ans = 31 Current position: None case 9, ans =99
Solución 1
En primer lugar, comience por averiguar dónde se imprime “Posición actual: Ninguna”. Hay dos lugares que imprimen eso explícitamente y uno que podría imprimirlo si el valorador de current._element era None. Puede utilizar el depurador para revisar su código y descubrirlo: pdb — El depurador de Python — Documentación de Python 3.12.1[^] Te ayudará si no sabes cómo usarlo.
Luego observe por qué llegó a esa posición, qué camino siguió y por qué. ¿Qué hizo que fuera así? ¿Qué variables no tuvieron los valores esperados? ¿Qué se propusieron? ¿Qué deben contener? ¿Dónde deberían haberse colocado? ¿Por qué no lo fueron?
Cuando sepa todo eso, el autor del código (es decir, usted) debería tener bastante claro cuál es el problema y debería poder solucionarlo.
Pero lograr que su código se ejecute correctamente es una gran parte de una tarea, y no aprenderá a corregir código complicado hasta que pueda corregir un código simple como este.
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