import torch import streamlit as st import subprocess import os import torch import torch.nn as nn import torch.nn.functional as F from transformers import BertTokenizer import appbuilder from transformers import BertModel #加载预训练模型 pretrained = BertModel.from_pretrained('hfl/chinese-macbert-base') #需要移动到cuda上 device = 'cuda' if torch.cuda.is_available() else 'cpu' pretrained.to(device) #不训练,不需要计算梯度 for param in pretrained.parameters(): param.requires_grad_(False) #多头注意力机制 class MultiHeadAttention(nn.Module): def __init__(self, hidden_size, num_heads): super(MultiHeadAttention, self).__init__() # 确保隐藏层特征数能够被头数整除 assert hidden_size % num_heads == 0 self.hidden_size = hidden_size self.num_heads = num_heads self.head_dim = hidden_size // num_heads # 计算每个头的维度 # 定义线性层，用于对查询、键、值进行线性变换 self.linear_q = nn.Linear(hidden_size, hidden_size) self.linear_k = nn.Linear(hidden_size, hidden_size) self.linear_v = nn.Linear(hidden_size, hidden_size) self.linear_out = nn.Linear(hidden_size, hidden_size) # 定义输出线性层，用于整合多头注意力后的输出 def forward(self, x): batch_size, seq_len, _ = x.size() # 对输入进行线性变换，并将其分割为多个头 q = self.linear_q(x).view(batch_size, seq_len, self.num_heads, self.head_dim).transpose(1, 2) k = self.linear_k(x).view(batch_size, seq_len, self.num_heads, self.head_dim).transpose(1, 2) v = self.linear_v(x).view(batch_size, seq_len, self.num_heads, self.head_dim).transpose(1, 2) # 计算注意力分数 scores = torch.matmul(q, k.transpose(-2, -1)) / torch.sqrt(torch.tensor(self.head_dim, dtype=torch.float)) attn_weights = F.softmax(scores, dim=-1) # 计算注意力权重 # 根据注意力权重对值进行加权求和 context = torch.matmul(attn_weights, v).transpose(1, 2).contiguous().view(batch_size, seq_len, self.hidden_size) out = self.linear_out(context) # 整合多头注意力的输出 return out class Model(nn.Module): def __init__(self): super(Model, self).__init__() self.fc1 = nn.Linear(768, 512) # 第一层全连接层 self.fc2 = nn.Linear(512, 256) # 第二层全连接层 self.fc3 = nn.Linear(256, 2) # 第三层全连接层 self.dropout = nn.Dropout(p=0.5) self.bn1 = nn.BatchNorm1d(512) self.bn2 = nn.BatchNorm1d(256) self.activation = nn.ReLU() self.multihead_attention = MultiHeadAttention(hidden_size=768, num_heads=8) # 多头注意力模块 def forward(self, input_ids, attention_mask, token_type_ids): out = pretrained(input_ids=input_ids, attention_mask=attention_mask, token_type_ids=token_type_ids).last_hidden_state # 应用多头注意力机制 out = self.multihead_attention(out) out = out[:, 0] # 提取[CLS]标记的输出 out = self.activation(self.bn1(self.fc1(out))) out = self.dropout(out) out = self.activation(self.bn2(self.fc2(out))) out = self.dropout(out) out = self.fc3(out) out = out.softmax(dim=1) return out def load_models_and_predict(text, device): # 加载模型 MacBERT_base_CDialBias = torch.load('models\MacBERT-base-CDialBias.pth') MacBERT_base_CDialBias.to(device) MacBERT_base_COLD = torch.load('models\MacBERT-base-CDialBias.pth') MacBERT_base_COLD.to(device) # 获取密钥和ID os.environ['APPBUILDER_TOKEN'] = "bce-v3/ALTAK-n2XgeA6FS3Q5E7Jab6UwE/850b44ebec64c4cad705986ab0b5e3df4b05d407" app_id = "df881861-9fa6-40b6-b3bd-26df5f5d4b9a" # 初始化agent实例 your_agent = appbuilder.AppBuilderClient(app_id) # 创建会话id conversation_id = your_agent.create_conversation() # 加载字典和分词工具 tokenizer = BertTokenizer.from_pretrained('hfl/chinese-macbert-base') # 对输入文本进行编码 inputs = tokenizer(text, return_tensors="pt", padding=True, truncation=True) # 将输入数据移动到相同的设备上 inputs = {k: v.to(device) for k, v in inputs.items()} # 设置模型为评估模式 MacBERT_base_CDialBias.eval() MacBERT_base_COLD.eval() # 调用千帆api获取标签 msg = your_agent.run(conversation_id, text) answer = msg.content.answer # 进行预测 with torch.no_grad(): out1 = MacBERT_base_CDialBias(**inputs) with torch.no_grad(): out2 = MacBERT_base_COLD(**inputs) out1 = torch.argmax(out1, dim=1).item() out2 = torch.argmax(out2, dim=1).item() out3 = answer[0] # 分析结果 if out3 == "1": if out1 == out2 == out3 == 1: result = "这句话具有攻击性和社会偏见" elif out1 == 0 and out2 == 1: result = "这句话具有攻击性，但无社会偏见" elif out1 == 1 and out2 == 0: result = "这句话不具有攻击性，但具有社会偏见" else: result = "这句话具有攻击性" elif out3 == "0": if out1 == out2 == out3 == 0: result = "这句话不具有攻击性和社会偏见" elif out1 == 0 and out2 == 1: result = "这句话具有攻击性，但无社会偏见" elif out1 == 1 and out2 == 0: result = "这句话不具有攻击性，但具有社会偏见" else: result = "这句话不具有攻击性" return result def run_command(command): try: subprocess.run(command, shell=True, check=True) except subprocess.CalledProcessError as e: print(f"Error executing command: {e}") #创建网页 st.title("☁礼貌用语检测器") with st.sidebar: # 初始化session state if 'logged_in' not in st.session_state: st.session_state.logged_in = False # 用户名和密码输入 username = st.sidebar.text_input('用户名') password = st.sidebar.text_input('密码', type='password') # 登录按钮 if st.sidebar.button('登录'): # 这里可以添加验证逻辑，例如检查用户名和密码是否正确 if username == 'admin' and password == '12345': st.session_state.logged_in = True st.sidebar.success('登录成功！') else: st.error('用户名或密码错误，请重试。') st.stop() #清空消息 clear = st.button("清除") if clear: st.session_state.clear() st.divider() #输出内容 if "memory" not in st.session_state: st.session_state['memory'] = [] st.session_state['message'] = [{"role": "ai", "content": "你好！我是“礼貌用语检测器”。在这里，我能够帮助你检测中文语言中的攻击性和社会偏见内容，维护一个文明、和谐的交流环境。请告诉我你的需求，我会尽力提供帮助。"}] for message in st.session_state['message']: st.chat_message(message["role"]).write(message["content"]) #输入内容 text = st.chat_input() #运行 if text and st.session_state.logged_in == True: #将问题保存进message和memory st.session_state["message"].append({"role": "human", "content": text}) st.session_state["memory"].append(text) st.chat_message("human").write(text) #得到回答 with st.spinner("AI正在思考中，请稍等..."): result = load_models_and_predict(text, device) #将回答保存进message和memory st.session_state["message"].append({"role": "ai", "content": result}) st.session_state["memory"].append(result) st.chat_message("ai").write(result) elif text and st.session_state.logged_in == False: st.error('请先登录！') st.stop()