1)__repr__修改instance的string representation,方便调试,见python cookbook 8.1节 2)line22和line55 根据提供的key参数对列表进行排序 3)构建Node类,体会OO编程 4)其他实现:Rosettacode 5)Ipython notebook
Huffman编码示例: frombinary_treeimportBTreefromcollectionsimportCounter# string字符串至少含有两个不同的字符string='ABCACCDAEAE'counter_dict=Counter(string)print('各字符出现次数:',counter_dict)# 返回一个数组的最小值,及其对应的下标defmin_and_index(array):f_minimum=float('inf')flag=Noneforiinrange...
(node._name + ' encoding:',end=''), for i in range(length): print (self.Buffer[i],end='') print ('\n') return self.Buffer[length]=0 self.pre(node._left,length+1) self.Buffer[length]=1 self.pre(node._right,length+1) #生成哈夫曼编码 def get_code(self): self.pre(self....
right, current_code + "1", codes) # 右子树 return codes 1. 2. 3. 4. 5. 6. 7. 8. 4. 使用编码对输入文本进行压缩 使用生成的编码对文本进行压缩。 def compress(text, codes): return ''.join(codes[char] for char in text) # 将字符转换为编码 1. 2. 5. 使用Huffman树对编码进行...
char_weights=[('a',7),('b',19),('c',2),('d',6),('e',32),('f',3),('g',21),('h',10)]tree=HuffmanTree(char_weights)tree.get_code() 4.总结 Huffman树与Huffman编码都是以二叉树为依托的,二叉树是数据结构中非常重要的一环,用python来实现它不仅能将这个知识吃透彻,还能锻炼自己...
图像压缩霍夫曼编码python huffman编码压缩图像,Huffman压缩图片:github项目地址实现结果输出:实现方式见注释HuffmanCode.cpp//HuffmanCode.cpp:此文件包含"main"函数。程序执行将在此处开始并结束。/*创建工程。2、读取源文件。3、生成哈夫曼树。4、生成哈夫曼编码。5、
1#构建节点类2classTreeNode:3def__init__(self, data):4"""5:data is a tuple the first element is value and the second is priority6:param data:7"""8self.value =data[0]9self.priority = data[1]10self.left_child =None11self.right_child =None12self.code =""131415#创建树节点队列的...
1.完整代码——Python语言实现: #节点类,当树中叶节点最大数为n时,霍夫曼树的总节点数为2n-1 class Node(object): def __init__(self,name=None,value=None): self._name=name self._value=value self._left=None self._right=None self._codevalue='0' ...
12 self.code = ""13 14 15# 创建树节点队列的函数 16def create_node_queue(codes):17 queue = []18for code in codes:19 queue.append(TreeNode(code))20return queue 21 22 23# 在队列中间添加新的节点元素并保证优先度从⼤到⼩排列 24def add_queue(queue, node_new):25if len(que...
Below is my configuration - And the code which am using is : Error - Are you sure you need to use TLS and not ...In following program, what is the purpose of the while loop? There are no problems with the compilation, but whether or not I have the while loop in place or not, ...