# coding=utf-8import mathimport randomimport hashlibclass Node: def __init__(self,item): self.item = item self.child1 = None self.child2 = None self.hash = None self.data = None def change_data(self,data): self.data=data self.hash = hashlib.md5(data.encode('utf-8')).hexdigest()[8:-8] #hexdigest()返回摘要，作为十六进制数据字符串值 [8:-8]将32位MD5转换为16进制 print("make_hash",self.hash,"size",len(self.hash),end=" ") return self.hash: def __init__(self): self.root = Noneclass Tree def add(self, item):#逐层添加子节点 node = Node(item) end_str = make_data(item) print("add node ",item) if end_str !=None and end_str != -1: node.change_data(end_str) print("data= %s " % (node.data)) print("hash= %s " % (node.hash)) if self.root is None: self.root = node else: q = [self.root] while True: pop_node = q.pop(0) if pop_node.child1 is None: pop_node.child1 = node return elif pop_node.child2 is None: pop_node.child2 = node return else: q.append(pop_node.child1) q.append(pop_node.child2) def reload_hash(self): # 层次遍历更新hash if self.root is None: return None q = [self.root] item = [(self.root.item,self.root.data,self.root.hash)] while q != []: pop_node = q.pop(0) if pop_node.child1 and pop_node.child2 : if pop_node.child1.hash and pop_node.child2.hash: print("更新基础节点",pop_node.item,end=" ") end_str=pop_node.child1.hash+pop_node.child2.hash end_hash=pop_node.change_data(end_str) print("end_hash= %s " % (end_hash)) if pop_node.child1 is not None: q.append(pop_node.child1) if pop_node.child2 is not None: q.append(pop_node.child2) return def traverse(self): # 层次遍历 if self.root is None: return None q = [self.root] item = [(self.root.item,self.root.data,self.root.hash)] while q != []: pop_node = q.pop(0) if pop_node.child1 is not None: q.append(pop_node.child1) item.append((pop_node.child1.item,pop_node.child1.data,pop_node.child1.hash)) if pop_node.child2 is not None: q.append(pop_node.child2) item.append((pop_node.child2.item,pop_node.child2.data,pop_node.child2.hash)) return (item)def make_data(i): if i>6 and i<15: raw_str = "xizzhongcai15310120233" nums = math.floor(1e5 * random.random()) nums = str(nums) nums = nums.zfill(5) end_str = raw_str + nums print("end_str",end_str) return end_str elif i>=0 and i<7: return None else: return -1# t = Tree()# for i in range(15):# t.add(i)if __name__ == '__main__': t = Tree() for i in range(7): # 基础节点 t.add(i) for i in range(7, 15): # 带数据的节点 t.add(i) for i in range(4,0,-1): #刷新基础节点hash值 print("第",i,'层节点hash刷新:') print(t.reload_hash())print('前序遍历:\n节点名:数据：hash值',t.traverse())#作业上传 混分
来源：https://www.cnblogs.com/iamxzc/p/10874453.html