为什么会出现这个字符▯？

Question

所以当我运行我的代码时会出现这个字符▯，我认为这意味着缺少字符，因此无法显示。 （如果我错了，不确定纠正我）而且基本上我希望能够摆脱那个角色。这是我运行代码时的样子：

但是，在空闲的后端，当我单击其中一个框以使其显示在顶部时，它不会注册并且在空闲时看起来像这样：

如果它不会出现在空闲状态，为什么它会出现在屏幕上？ 另外我怎样才能摆脱主屏幕上的▯字符？

Here is my full code.

以下是我认为问题所在的部分。 （但是我一直没能解决问题）

我的树比较类以查找句子及其常用用法：

class Branch():
    def __init__(self, value):
        self.left = None
        self.right = None
        self.value = value
        self.frequency = 1

    def incFreq(self):
        self.frequency = self.frequency + 1

    def freq(self):
        return self.frequency

class Tree():    

    highest = []

    def __init__(self):
        self.root = None
        self.found = False        

    def findHighest(self):
        from operator import itemgetter, attrgetter
        self.highest = []
        self.inorder(self.root)
        self.highest = sorted(self.highest, key=itemgetter(1), reverse=True)        
        return self.highest

    #lessThan function needed to compare strings
    def lessThan(self, a, b):    
        if len(a) < len(b):
            loopCount = len(a)
        else:
            loopCount = len(b)        
        for pos in range(0, loopCount):
            if a[pos] > b[pos]:
                return False        
        return True

    def outputTree(self):
        self.inorder(self.root)

    def insert(self, value):
        #increment freq if already exists, else insert
        if not self.exists(value):            
            self.root = self.insertAtBranch(self.root, value)

    def exists(self, value):
        #set the class variable found to False to assume it is not there      
        self.found = False
        self.findAtBranch(self.root, value)
        return self.found

    #Used to fine a value in a tree
    def findAtBranch(self, branch, value):        
        if branch == None:
            pass
        else:
            #print ("[" + branch.value + "][" + value + "]") # Error checking
            if branch.value == value:
                self.found = True
                #print("found " + value)
                branch.incFreq()
                #print(branch.freq())
            else:
                self.findAtBranch(branch.left, value)
                self.findAtBranch(branch.right, value)        

    def insertAtBranch(self, branch, value):
        if branch == None:
            return Branch(value)
        else:
            if self.lessThan(branch.value, value):
                branch.right = self.insertAtBranch(branch.right, value)            
            else:
                branch.left = self.insertAtBranch(branch.left, value)
            return branch

    def inorder(self, branch):
        if branch == None: return
        self.highest.append((branch.value, branch.freq()))
        #print (branch.value)
        #print (branch.freq())
        #print(self.highest[0])
        self.inorder(branch.left)
        self.inorder(branch.right)

这是我使用树并传递句子以用于不同功能的地方：

def getPhrases(self, numToReturn):

    topPhrases = []
    phrasesTree = Tree()

    #load tree with phrases from phrase text file
    file = open('setPhrases.txt', 'r')
    for line in file:    
        phrasesTree.insert(line)

    #create a list of the top n of phrases to return
    val = 0
    for phrase in phrasesTree.findHighest():
        if val < numToReturn:
            topPhrases.append(phrase)
        val = val + 1

    return topPhrases

这是我使用句子的地方，以便能够在屏幕上显示它们：

def createPhrases(self):

    print("createPhrases")
    self.deletePanes()

    self.show_keyboard = False
    self.show_words = False
    self.show_phrases = True
    self.show_terminal = True

    words = self.getPhrases(10)
    for word, count in words:
        self.addPane("{}".format(word, count), WORDS)
    self.addPane("Boxes", PHRASE)
    self.addPane("Keyboard", PHRASE)
    self.addPane("OK", PHRASE)
    self.drawPanes()

Answer 1

当您从文件中读取行时，换行符位于末尾。 pygame 的 documentation 声明：

文本只能是单行：不呈现换行符。

所以，你应该改变这个片段：

file = open('setPhrases.txt', 'r')
for line in file:    
    phrasesTree.insert(line)

到这里：

file = open('setPhrases.txt', 'r')
for line in file:    
    phrasesTree.insert(line.strip())