我正在开展一个处理图表的实践项目。这是一款互动冒险游戏，用户输入选择并试图逃离荒野，然而，现在，当用户选择第一个提示的答案时，它会结束游戏，而不提示其他选择，从而使游戏持续更长时间，并且对用户来说更有意义。我使用元组来表示分支叙述，但我认为我使用错误。如果有人有时间查看此内容或有任何提示，我将不胜感激！！
这是创建故事树的根节点并启动游戏的 main.py 文件：
# Import TreeNode class and story_data from respective files
from story_data import story_data
from tree_node import TreeNode
def main():
# Create the root node with the initial story piece
story_root = TreeNode(story_data.story_piece, story_data.choices)
# Print the initial story piece
print("Once upon a time...")
print(story_root.story_piece)
# Begin the story traversal
story_root.traverse()
# Check if this file is being run directly
if __name__ == "__main__":
main()
这是代表故事树中节点的tree_node.py 文件：
class TreeNode:
def __init__(self, story_piece, choices=None):
self.story_piece = story_piece
self.choices = choices or []
def add_child(self, node):
self.choices.append(node)
def traverse(self):
story_node = self
while story_node.choices:
choice = input("Enter 1 or 2 to continue the story: ")
if choice not in ["1", "2"]:
print("Invalid choice. Try again.")
else:
chosen_index = int(choice) - 1
chosen_child = story_node.choices[chosen_index]
print(chosen_child.story_piece)
story_node = chosen_child
最后，这是定义故事结构的story_data.py 文件，创建树节点的实例来表示故事的不同部分：
from tree_node import TreeNode
story_data = TreeNode("""
You are in a forest clearing. There is a path to the left.
A bear emerges from the trees and roars!
Do you:
1 ) Roar back!
2 ) Run to the left...
""")
choice_a_1 = TreeNode("""
The bear returns and tells you it's been a rough week. After
making peace with
a talking bear, he shows you the way out of the forest.
YOU HAVE ESCAPED THE WILDERNESS.
""")
choice_a_2 = TreeNode("""
The bear returns and tells you that bullying is not okay before
leaving you alone
in the wilderness.
YOU REMAIN LOST.
""")
choice_b_1 = TreeNode("""
The bear is unamused. After smelling the flowers, it turns
around and leaves you alone.
YOU REMAIN LOST.
"""
)
choice_b_2 = TreeNode("""
The bear understands and apologizes for startling you. Your new
friend shows you a
path leading out of the forest.
YOU HAVE ESCAPED THE WILDERNESS.
"""
)
story_data.add_child(choice_a_1)
story_data.add_child(choice_a_2)
story_data.add_child(choice_b_1)
story_data.add_child(choice_b_2)
正如评论中所说，
您仅向
添加了子节点。其他节点都不包含子节点，因此story_data循环退出。while
为了提供更多细节，在执行
story_data.pyTreeNodestory_data.story_piece = "You are in a forest [..]"
story_data.choices = [choice_a_1, choice_a_2, choice_b_1, choice_b_2]
choice_a_1.story_piece = "The bear [..] tells you it's been a rough week [..]"
choice_a_1.choices = []
choice_a_2.story_piece = "The bear [..] tells you bully is not okay [..]"
choice_a_2.choices = []
choice_b_1.story_piece = "The bear is unamused [..]"
choice_b_1.choices = []
choice_b_2.story_piece = "The bear understands [..]"
choice_b_2.choices = []
whilestory_node.choiceslistTrue当用户从
["1","2"]choice_a_1choice_a_2story_node.choiceslistFalse如果您不确定 python 程序的行为，您可以随时使用 VS Code/PyCharm/等 IDE 进行调试，或者在您怀疑问题所在的位置之前和/或之后使用
print因此，在这种情况下，尝试运行具有以下更改的程序：
class TreeNode:
# .. (unchanged)
def traverse(self):
story_node = self
while story_node.choices:
print("story_node.choices before choice " + story_node.choices) # <-- added
choice = input("Enter 1 or 2 to continue the story: ")
if choice not in ["1", "2"]:
print("Invalid choice. Try again.")
else:
chosen_index = int(choice) - 1
chosen_child = story_node.choices[chosen_index]
print(chosen_child.story_piece)
story_node = chosen_child
print("story_node.choices after choice " + story_node.choices) # <-- added
def __repr__(self): # <-- added
return self.story_piece # <-- added
这样你会得到类似以下的输出：
Once upon a time...
1) [..]
2) [..]
story_node.choices before choice [
The bear returns and tells you it's been a rough week. [..]
,
The bear returns and tells you that bullying is not okay [..]
,
The bear is unamused. [..]
,
The bear understands and apologizes [..]
]
Enter 1 or 2 to continue the story: 1
The bear returns and tells you it's been a rough week. [..]
story_node.choices after choice []
注意输出的最后一行是空的
list顺便说一句，
["1", "2"]listtuple("1", "2")visitorTreeNodetraverseTreeNode