generated from Python-2026Spring/assignment-05-final-project-template
80 lines
4.1 KiB
Python
80 lines
4.1 KiB
Python
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# app.py - 电信客户流失预测Streamlit交互页面
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import streamlit as st
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import joblib
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import pandas as pd
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import matplotlib.pyplot as plt
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import seaborn as sns
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# 基础设置（中文显示）
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plt.rcParams['font.sans-serif'] = ['Microsoft YaHei']
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plt.rcParams['axes.unicode_minus'] = False
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# 缓存模型
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@st.cache_resource
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def load_trained_model():
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try:
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model = joblib.load('telco_churn_model.pkl')
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return model
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except FileNotFoundError:
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st.error("❌ 未找到模型文件！请先运行 src/model.py 训练模型")
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return None
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# 页面标题
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st.set_page_config(page_title="电信客户流失预测系统", page_icon="📱", layout="wide")
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st.title("📱 电信客户流失预测系统")
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st.divider()
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# 1. 客户信息输入
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st.subheader("1. 输入客户信息")
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with st.form("customer_form"):
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col1, col2 = st.columns(2)
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with col1:
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tenure = st.number_input("在网时长（月）", min_value=0, max_value=72, value=12)
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monthly_charges = st.number_input("月消费金额", min_value=18.0, max_value=120.0, value=69.99)
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total_charges = st.number_input("总消费金额", min_value=18.0, max_value=8684.0, value=839.88)
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with col2:
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contract = st.selectbox("合约类型", ["Month-to-month（月付）", "One year（1年）", "Two year（2年）"])
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internet_service = st.selectbox("网络服务", ["DSL（宽带）", "Fiber optic（光纤）", "No（无）"])
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payment_method = st.selectbox("支付方式", ["Electronic check（电子支票）", "Mailed check（邮寄支票）", "Bank transfer（银行转账）", "Credit card（信用卡）"])
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submit_btn = st.form_submit_button("🚀 预测流失风险")
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# 2. 预测结果
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if submit_btn:
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model = load_trained_model()
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if model:
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# 转换输入为模型可识别格式
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contract_map = {"Month-to-month（月付）": "Month-to-month", "One year（1年）": "One year", "Two year（2年）": "Two year"}
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internet_map = {"DSL（宽带）": "DSL", "Fiber optic（光纤）": "Fiber optic", "No（无）": "No"}
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payment_map = {"Electronic check（电子支票）": "Electronic check", "Mailed check（邮寄支票）": "Mailed check", "Bank transfer（银行转账）": "Bank transfer (automatic)", "Credit card（信用卡）": "Credit card (automatic)"}
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# 构造数据
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customer_data = pd.DataFrame({
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'customerID': ['TEST001'], 'tenure': [tenure], 'MonthlyCharges': [monthly_charges], 'TotalCharges': [total_charges],
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'Contract': [contract_map[contract]], 'InternetService': [internet_map[internet_service]], 'PaymentMethod': [payment_map[payment_method]],
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'OnlineSecurity': ['No'], 'TechSupport': ['No'], 'PaperlessBilling': ['Yes'], 'gender': ['Female'],
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'SeniorCitizen': [0], 'Partner': ['Yes'], 'Dependents': ['No'], 'PhoneService': ['Yes'],
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'MultipleLines': ['No'], 'OnlineBackup': ['Yes'], 'DeviceProtection': ['No'], 'StreamingTV': ['Yes'], 'StreamingMovies': ['No']
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})
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# 添加特征组合
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customer_data['tenure_monthly'] = customer_data['tenure'] * customer_data['MonthlyCharges']
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customer_data['tenure_ratio'] = customer_data['tenure'] / (customer_data['TotalCharges'] + 1)
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customer_data['monthly_total_ratio'] = customer_data['MonthlyCharges'] / (customer_data['TotalCharges'] + 1)
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# 预测
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churn_pred = model.predict(customer_data)[0]
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churn_prob = model.predict_proba(customer_data)[:, 1][0]
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# 展示结果
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st.divider()
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st.subheader("2. 流失风险预测结果")
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if churn_pred == 1:
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st.error(f"⚠️ 流失风险高（概率：{churn_prob:.2%}）")
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else:
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st.success(f"✅ 流失风险低（概率：{churn_prob:.2%}）")
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# 3. 分析与建议
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st.divider()
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st.subheader("3. 流失影响因素")
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st.image("特征重要性TOP10.png", caption="影响流失的TOP10因素")
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st.subheader("4. 留存建议")
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st.markdown("- 短在网时长+高消费：提供长期合约折扣\n- 光纤用户：优化网络稳定性\n- 电子支票支付：自动续费优惠")
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