{"id":4033,"date":"2025-10-12T10:09:07","date_gmt":"2025-10-12T02:09:07","guid":{"rendered":"http:\/\/viplao.com\/?p=4033"},"modified":"2025-10-12T10:09:08","modified_gmt":"2025-10-12T02:09:08","slug":"%e3%80%90python%e5%ae%9e%e8%b7%b5%e6%a1%88%e4%be%8b%e3%80%91%e7%94%b5%e5%95%86%e5%b9%b3%e5%8f%b0%e7%94%a8%e6%88%b7%e6%b5%81%e5%a4%b1%e9%a2%84%e8%ad%a6%e5%88%86%e6%9e%90%e6%8a%a5%e5%91%8a","status":"publish","type":"post","link":"http:\/\/viplao.com\/index.php\/2025\/10\/12\/%e3%80%90python%e5%ae%9e%e8%b7%b5%e6%a1%88%e4%be%8b%e3%80%91%e7%94%b5%e5%95%86%e5%b9%b3%e5%8f%b0%e7%94%a8%e6%88%b7%e6%b5%81%e5%a4%b1%e9%a2%84%e8%ad%a6%e5%88%86%e6%9e%90%e6%8a%a5%e5%91%8a\/","title":{"rendered":"\u3010Python\u5b9e\u8df5\u6848\u4f8b\u3011\u7535\u5546\u5e73\u53f0\u7528\u6237\u6d41\u5931\u9884\u8b66\u5206\u6790\u62a5\u544a"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_71 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div 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href=\"http:\/\/viplao.com\/index.php\/2025\/10\/12\/%e3%80%90python%e5%ae%9e%e8%b7%b5%e6%a1%88%e4%be%8b%e3%80%91%e7%94%b5%e5%95%86%e5%b9%b3%e5%8f%b0%e7%94%a8%e6%88%b7%e6%b5%81%e5%a4%b1%e9%a2%84%e8%ad%a6%e5%88%86%e6%9e%90%e6%8a%a5%e5%91%8a\/#2_%E5%9F%BA%E4%BA%8E%E6%B7%B1%E5%BA%A6%E6%B4%9E%E5%AF%9F%E7%9A%84%E8%A1%8C%E5%8A%A8%E5%BB%BA%E8%AE%AE\" title=\"2. \u57fa\u4e8e\u6df1\u5ea6\u6d1e\u5bdf\u7684\u884c\u52a8\u5efa\u8bae\">2. \u57fa\u4e8e\u6df1\u5ea6\u6d1e\u5bdf\u7684\u884c\u52a8\u5efa\u8bae<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"http:\/\/viplao.com\/index.php\/2025\/10\/12\/%e3%80%90python%e5%ae%9e%e8%b7%b5%e6%a1%88%e4%be%8b%e3%80%91%e7%94%b5%e5%95%86%e5%b9%b3%e5%8f%b0%e7%94%a8%e6%88%b7%e6%b5%81%e5%a4%b1%e9%a2%84%e8%ad%a6%e5%88%86%e6%9e%90%e6%8a%a5%e5%91%8a\/#3_%E6%80%BB%E7%BB%93\" title=\"3. \u603b\u7ed3\">3. \u603b\u7ed3<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A8%A1%E5%9D%97%E4%B8%80%EF%BC%9A%E4%B8%9A%E5%8A%A1%E7%90%86%E8%A7%A3_Business_Understanding\"><\/span><strong>\u6a21\u5757\u4e00\uff1a\u4e1a\u52a1\u7406\u89e3 (Business Understanding)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_%E4%B8%9A%E5%8A%A1%E8%83%8C%E6%99%AF%E4%B8%8E%E7%97%9B%E7%82%B9\"><\/span><strong>1. \u4e1a\u52a1\u80cc\u666f\u4e0e\u75db\u70b9<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u5728\u7ade\u4e89\u6fc0\u70c8\u7684\u7535\u5546\u5e02\u573a\uff0c\u83b7\u53d6\u65b0\u7528\u6237\u7684\u6210\u672c\uff08CAC\uff09\u8fdc\u9ad8\u4e8e\u7ef4\u62a4\u8001\u7528\u6237\u7684\u6210\u672c\u3002\u7528\u6237\u6d41\u5931\u662f\u5e73\u53f0\u7684\u6838\u5fc3\u75db\u70b9\u4e4b\u4e00\uff0c\u5b83\u76f4\u63a5\u5bfc\u81f4GMV\u4e0b\u964d\u3001\u5e02\u573a\u4efd\u989d\u840e\u7f29\u548c\u54c1\u724c\u5f71\u54cd\u529b\u51cf\u5f31\u3002\u56e0\u6b64\uff0c\u80fd\u591f<strong>\u63d0\u524d\u8bc6\u522b\u51fa\u5177\u6709\u6d41\u5931\u503e\u5411\u7684\u7528\u6237<\/strong>\uff0c\u5e76\u91c7\u53d6\u9488\u5bf9\u6027\u7684\u633d\u7559\u63aa\u65bd\uff0c\u5bf9\u4e8e\u5e73\u53f0\u7684\u53ef\u6301\u7eed\u589e\u957f\u81f3\u5173\u91cd\u8981\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_%E9%A1%B9%E7%9B%AE%E7%9B%AE%E6%A0%87_%E5%8D%87%E7%BA%A7\"><\/span><strong>2. \u9879\u76ee\u76ee\u6807 (\u5347\u7ea7)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul>\n<li><strong>\u4e1a\u52a1\u76ee\u6807<\/strong>\uff1a\u964d\u4f4e\u7528\u6237\u6d41\u5931\u7387\uff0c\u5e76\u901a\u8fc7<strong>\u4e2a\u6027\u5316\u633d\u7559\u7b56\u7565<\/strong>\u63d0\u5347\u7528\u6237\u751f\u547d\u5468\u671f\u603b\u4ef7\u503c\uff08LTV\uff09\u3002<\/li>\n\n\n\n<li><strong>\u6570\u636e\u79d1\u5b66\u76ee\u6807<\/strong>\uff1a\n<ol>\n<li>\u901a\u8fc7\u6784\u5efa\u66f4\u4e30\u5bcc\u7684\u7528\u6237\u753b\u50cf\uff08\u5f15\u5165\u6d4f\u89c8\u3001\u52a0\u8d2d\u3001\u54c1\u7c7b\u504f\u597d\u7b49\u884c\u4e3a\u7279\u5f81\uff09\uff0c\u52a0\u6df1\u5bf9\u7528\u6237\u884c\u4e3a\u7684\u7406\u89e3\u3002<\/li>\n\n\n\n<li>\u5229\u7528<strong>XGBoost<\/strong>\u6a21\u578b\uff0c\u6784\u5efa\u4e00\u4e2a<strong>\u66f4\u9ad8\u7cbe\u5ea6<\/strong>\u7684\u7528\u6237\u6d41\u5931\u9884\u8b66\u7cfb\u7edf\u3002<\/li>\n\n\n\n<li>\u4ece\u6a21\u578b\u4e2d\u6316\u6398\u51fa\u66f4<strong>\u7ec6\u7c92\u5ea6(granular)<\/strong>&nbsp;\u7684\u3001\u53ef\u7528\u4e8e<strong>\u8d85\u7ec6\u5206(hyper-segmentation)<\/strong>&nbsp;\u8fd0\u8425\u7684\u6d1e\u5bdf\u3002<\/li>\n<\/ol>\n<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_%E6%88%90%E5%8A%9F%E6%A0%87%E5%87%86\"><\/span><strong>3. \u6210\u529f\u6807\u51c6<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul>\n<li><strong>\u6a21\u578b\u8bc4\u4f30\u6307\u6807<\/strong>\uff1a\u5728\u4fdd\u6301\u9ad8<strong>\u53ec\u56de\u7387(Recall)<\/strong>&nbsp;\u7684\u540c\u65f6\uff0c\u663e\u8457\u63d0\u5347<strong>\u7cbe\u786e\u7387(Precision)<\/strong>&nbsp;\u548c\u6574\u4f53<strong>F1-Score<\/strong>\uff0c\u4ee5\u5b9e\u73b0\u66f4\u9ad8\u6548\u7684\u8d44\u6e90\u6295\u653e\u3002<\/li>\n\n\n\n<li><strong>\u4e1a\u52a1\u8bc4\u4f30\u6307\u6807<\/strong>\uff1a\u80fd\u591f\u57fa\u4e8e\u6a21\u578b\u8f93\u51fa\uff0c\u5236\u5b9a\u51fa\u9488\u5bf9<strong>\u4e0d\u540c\u7528\u6237\u753b\u50cf<\/strong>\u7684\u5dee\u5f02\u5316\u633d\u7559\u7b56\u7565\uff0c\u5e76\u5728A\/B\u6d4b\u8bd5\u4e2d\u9a8c\u8bc1\u5176\u6709\u6548\u6027\u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A8%A1%E5%9D%97%E4%BA%8C%EF%BC%9A%E6%95%B0%E6%8D%AE%E7%90%86%E8%A7%A3_Data_Understanding\"><\/span><strong>\u6a21\u5757\u4e8c\uff1a\u6570\u636e\u7406\u89e3 (Data Understanding)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_%E6%95%B0%E6%8D%AE%E6%9D%A5%E6%BA%90%E4%B8%8E%E7%89%B9%E5%BE%81%E5%A2%9E%E5%BC%BA\"><\/span><strong>1. \u6570\u636e\u6765\u6e90\u4e0e\u7279\u5f81\u589e\u5f3a<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u6211\u4eec\u7ee7\u7eed\u4f7f\u7528\u6a21\u62df\u6570\u636e\u96c6\uff0c\u4f46\u6b64\u6b21\u5c06\u52a0\u5165\u66f4\u591a\u7ef4\u5ea6\u7684\u884c\u4e3a\u7279\u5f81\uff0c\u4ee5\u6784\u5efa\u66f4\u7acb\u4f53\u7684\u7528\u6237\u753b\u50cf\u3002<\/p>\n\n\n\n<ul>\n<li><code>page_views_per_session<\/code>: \u5e73\u5747\u6bcf\u6b21\u4f1a\u8bdd\u7684\u9875\u9762\u6d4f\u89c8\u91cf (\u8861\u91cf\u7528\u6237\u6d3b\u8dc3\u5ea6\u548c\u63a2\u7d22\u6df1\u5ea6)<\/li>\n\n\n\n<li><code>add_to_cart_rate<\/code>: \u52a0\u8d2d\u7387 (\u6d4f\u89c8\u5546\u54c1\u540e\u52a0\u5165\u8d2d\u7269\u8f66\u7684\u6bd4\u7387\uff0c\u8861\u91cf\u8d2d\u4e70\u610f\u5411)<\/li>\n\n\n\n<li><code>coupon_usage_rate<\/code>: \u4f18\u60e0\u5238\u4f7f\u7528\u7387 (\u8861\u91cf\u7528\u6237\u5bf9\u4ef7\u683c\u7684\u654f\u611f\u5ea6)<\/li>\n\n\n\n<li><code>preferred_category<\/code>: \u6700\u504f\u597d\u7684\u5546\u54c1\u54c1\u7c7b (\u7528\u4e8e\u54c1\u7c7b\u4ea4\u53c9\u8425\u9500)<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_%E6%95%B0%E6%8D%AE%E5%8A%A0%E8%BD%BD%E4%B8%8E%E6%8E%A2%E7%B4%A2_%E5%90%AB%E6%96%B0%E7%89%B9%E5%BE%81\"><\/span><strong>2. \u6570\u636e\u52a0\u8f7d\u4e0e\u63a2\u7d22 (\u542b\u65b0\u7279\u5f81)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>python<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u5bfc\u5165\u6838\u5fc3\u5e93\nimport pandas as pd\nimport numpy as np\nimport matplotlib.pyplot as plt\nimport seaborn as sns\nimport xgboost as xgb\n\n# \u8bbe\u7f6e\u53ef\u89c6\u5316\u98ce\u683c\nsns.set_style('whitegrid')\nplt.rcParams&#91;'font.sans-serif'] = &#91;'SimHei']\nplt.rcParams&#91;'axes.unicode_minus'] = False\n\n# --- \u6570\u636e\u751f\u6210\uff08\u5728\u771f\u5b9e\u573a\u666f\u4e2d\uff0c\u6b64\u6b65\u4e3a\u4ece\u6570\u636e\u4ed3\u5e93\u5173\u8054\u591a\u8868\u751f\u6210\uff09---\nnp.random.seed(42)\nn_samples = 5000\n# \u57fa\u7840\u6570\u636e\ndata = {\n    'customer_id': &#91;f'CUST_{i:04d}' for i in range(n_samples)],\n    'age': np.random.randint(18, 65, n_samples),\n    'gender': np.random.choice(&#91;'Male', 'Female'], n_samples, p=&#91;0.5, 0.5]),\n    'tenure_months': np.random.randint(1, 60, n_samples),\n    'avg_session_length': np.random.uniform(1, 30, n_samples),\n    'num_sessions': np.random.randint(1, 200, n_samples),\n    'total_purchases': np.random.randint(1, 150, n_samples),\n    'total_spend': np.random.uniform(50, 5000, n_samples),\n    'days_since_last_purchase': np.random.randint(1, 365, n_samples),\n    'num_complaints': np.random.choice(&#91;0, 1, 2, 3], n_samples, p=&#91;0.7, 0.2, 0.08, 0.02]),\n    'used_discount': np.random.choice(&#91;0, 1], n_samples, p=&#91;0.4, 0.6]),\n    # \u65b0\u589e\u7279\u5f81\n    'page_views_per_session': np.random.uniform(1, 15, n_samples),\n    'add_to_cart_rate': np.random.uniform(0.05, 0.8, n_samples),\n    'coupon_usage_rate': np.random.uniform(0, 1, n_samples),\n    'preferred_category': np.random.choice(&#91;'Electronics', 'Fashion', 'Home Goods', 'Groceries'], n_samples)\n}\ndf = pd.DataFrame(data)\n\n# \u521b\u9020\u66f4\u590d\u6742\u7684\u6d41\u5931\u903b\u8f91 (\u7ed3\u5408\u65b0\u7279\u5f81)\nchurn_probability = (\n    df&#91;'days_since_last_purchase'] \/ 365 * 1.2 +  # \u6743\u91cd\u66f4\u9ad8\n    df&#91;'num_complaints'] * 0.2 +\n    df&#91;'coupon_usage_rate'] * 0.1 - # \u4ef7\u683c\u654f\u611f\u7528\u6237\u53ef\u80fd\u66f4\u5bb9\u6613\u6d41\u5931\n    df&#91;'tenure_months'] \/ 60 * 0.5 -\n    df&#91;'total_purchases'] \/ 150 * 0.4 -\n    df&#91;'add_to_cart_rate'] * 0.5 - # \u52a0\u8d2d\u7387\u9ad8\uff0c\u610f\u5411\u5f3a\uff0c\u4e0d\u6613\u6d41\u5931\n    df&#91;'page_views_per_session'] \/ 15 * 0.2\n)\nchurn_probability = (churn_probability - churn_probability.min()) \/ (churn_probability.max() - churn_probability.min())\ndf&#91;'churn'] = (churn_probability &gt; np.quantile(churn_probability, 0.8)).astype(int)\n\n# --- \u6570\u636e\u52a0\u8f7d\u5b8c\u6210 ---\nprint(\"\u6570\u636e\u52a0\u8f7d\u6210\u529f\uff0c\u5305\u542b\u65b0\u589e\u7279\u5f81\u7684\u524d5\u884c\u9884\u89c8\uff1a\")\nprint(df.head())\n\n# \u53ef\u89c6\u5316\u65b0\u7279\u5f81\u4e0e\u6d41\u5931\u7684\u5173\u7cfb\nnew_features = &#91;'page_views_per_session', 'add_to_cart_rate', 'coupon_usage_rate']\nfig, axes = plt.subplots(1, 3, figsize=(18, 5))\nfor i, feature in enumerate(new_features):\n    sns.boxplot(x='churn', y=feature, data=df, ax=axes&#91;i])\n    axes&#91;i].set_title(f'{feature} vs Churn')\nplt.tight_layout()\nplt.show()\n\nplt.figure(figsize=(10, 6))\nsns.countplot(y='preferred_category', hue='churn', data=df)\nplt.title('\u4e0d\u540c\u54c1\u7c7b\u504f\u597d\u7684\u7528\u6237\u6d41\u5931\u60c5\u51b5')\nplt.show()<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote\">\n<p><strong>\u6d1e\u5bdf<\/strong>:<\/p>\n\n\n\n<ul>\n<li><code>add_to_cart_rate<\/code>&nbsp;\u548c&nbsp;<code>page_views_per_session<\/code>&nbsp;\u8f83\u4f4e\u7684\u7528\u6237\uff0c\u6d41\u5931\u503e\u5411\u66f4\u660e\u663e\uff0c\u8bf4\u660e\u7528\u6237<strong>\u53c2\u4e0e\u5ea6(Engagement)<\/strong>&nbsp;\u662f\u7559\u5b58\u7684\u5173\u952e\u3002<\/li>\n\n\n\n<li><code>coupon_usage_rate<\/code>&nbsp;\u8f83\u9ad8\u7684\u7528\u6237\uff0c\u6d41\u5931\u503e\u5411\u53cd\u800c\u7565\u9ad8\uff0c\u8fd9\u53ef\u80fd\u6697\u793a\u4ed6\u4eec\u662f<strong>\u4ef7\u683c\u654f\u611f\u578b\u7528\u6237<\/strong>\uff0c\u5fe0\u8bda\u5ea6\u8f83\u4f4e\u3002<\/li>\n\n\n\n<li>\u4e0d\u540c<strong>\u54c1\u7c7b\u504f\u597d<\/strong>\u7684\u7528\u6237\uff0c\u5176\u6d41\u5931\u6bd4\u4f8b\u4e5f\u5b58\u5728\u5dee\u5f02\u3002<\/li>\n<\/ul>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"891\" height=\"535\" src=\"http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image.png\" alt=\"\" class=\"wp-image-4034\" srcset=\"http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image.png 891w, http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-300x180.png 300w, http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-768x461.png 768w, http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-500x300.png 500w\" sizes=\"(max-width: 891px) 100vw, 891px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A8%A1%E5%9D%97%E4%B8%89%EF%BC%9A%E6%95%B0%E6%8D%AE%E5%87%86%E5%A4%87_Data_Preparation\"><\/span><strong>\u6a21\u5757\u4e09\uff1a\u6570\u636e\u51c6\u5907 (Data Preparation)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>python<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from sklearn.model_selection import train_test_split\nfrom sklearn.preprocessing import StandardScaler\n\n# \u72ec\u70ed\u7f16\u7801 'gender' \u548c 'preferred_category'\ndf_prepared = pd.get_dummies(df, columns=&#91;'gender', 'preferred_category'], drop_first=True)\ndf_prepared = df_prepared.drop('customer_id', axis=1)\n\n# \u5b9a\u4e49\u7279\u5f81X\u548c\u76ee\u6807y\nX = df_prepared.drop('churn', axis=1)\ny = df_prepared&#91;'churn']\n\n# \u5212\u5206\u6570\u636e\u96c6\nX_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42, stratify=y)\n\n# \u7279\u5f81\u7f29\u653e (\u5bf9\u4e8e\u6811\u6a21\u578b\u975e\u5fc5\u987b\uff0c\u4f46\u4fdd\u6301\u597d\u4e60\u60ef)\nscaler = StandardScaler()\nX_train_scaled = scaler.fit_transform(X_train)\nX_test_scaled = scaler.transform(X_test)\n\nprint(\"\u6570\u636e\u51c6\u5907\u5b8c\u6210\uff01\")<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A8%A1%E5%9D%97%E5%9B%9B%EF%BC%9A%E5%BB%BA%E6%A8%A1_Modeling_with_XGBoost\"><\/span><strong>\u6a21\u5757\u56db\uff1a\u5efa\u6a21 (Modeling with XGBoost)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>XGBoost\u662f\u68af\u5ea6\u63d0\u5347\u6811\u7b97\u6cd5\u7684\u4e00\u79cd\u9ad8\u6548\u5b9e\u73b0\uff0c\u5bf9\u5904\u7406\u590d\u6742\u3001\u975e\u7ebf\u6027\u7684\u5173\u7cfb\u975e\u5e38\u6709\u6548\u3002<\/p>\n\n\n\n<p>python<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u8ba1\u7b97\u7c7b\u522b\u6743\u91cd\uff0c\u7528\u4e8e\u5904\u7406\u4e0d\u5e73\u8861\u6570\u636e\n# scale_pos_weight = count(negative_class) \/ count(positive_class)\nscale_pos_weight = y_train.value_counts()&#91;0] \/ y_train.value_counts()&#91;1]\n\n# \u521d\u59cb\u5316\u5e76\u8bad\u7ec3XGBoost\u6a21\u578b\nmodel_xgb = xgb.XGBClassifier(\n    objective='binary:logistic',\n    eval_metric='logloss',\n    scale_pos_weight=scale_pos_weight,  # \u5904\u7406\u7c7b\u522b\u4e0d\u5e73\u8861\n    n_estimators=100,                  # \u6811\u7684\u6570\u91cf\n    max_depth=5,                       # \u6811\u7684\u6700\u5927\u6df1\u5ea6\n    learning_rate=0.1,                 # \u5b66\u4e60\u7387\n    use_label_encoder=False,           # \u907f\u514d\u8b66\u544a\n    random_state=42\n)\n\nmodel_xgb.fit(X_train_scaled, y_train)\n\nprint(\"XGBoost\u6a21\u578b\u8bad\u7ec3\u5b8c\u6210\uff01\")<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A8%A1%E5%9D%97%E4%BA%94%EF%BC%9A%E8%AF%84%E4%BC%B0_Evaluation\"><\/span><strong>\u6a21\u5757\u4e94\uff1a\u8bc4\u4f30 (Evaluation)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_%E9%A2%84%E6%B5%8B%E4%B8%8E%E8%AF%84%E4%BC%B0%E6%8C%87%E6%A0%87\"><\/span><strong>1. \u9884\u6d4b\u4e0e\u8bc4\u4f30\u6307\u6807<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>python<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>from sklearn.metrics import classification_report, confusion_matrix, ConfusionMatrixDisplay\n\n# \u5728\u6d4b\u8bd5\u96c6\u4e0a\u8fdb\u884c\u9884\u6d4b\ny_pred_xgb = model_xgb.predict(X_test_scaled)\n\n# \u6253\u5370\u5206\u7c7b\u62a5\u544a\nprint(\"XGBoost \u5206\u7c7b\u62a5\u544a:\")\nprint(classification_report(y_test, y_pred_xgb))\n\n# \u53ef\u89c6\u5316\u6df7\u6dc6\u77e9\u9635\ncm_xgb = confusion_matrix(y_test, y_pred_xgb)\ndisp_xgb = ConfusionMatrixDisplay(confusion_matrix=cm_xgb, display_labels=&#91;'Not Churn', 'Churn'])\ndisp_xgb.plot(cmap=plt.cm.Blues)\nplt.title('XGBoost \u6df7\u6dc6\u77e9\u9635')\nplt.show()<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote\">\n<p><strong>\u5206\u7c7b\u62a5\u544a\u89e3\u8bfb\u4e0e\u5bf9\u6bd4<\/strong>:<\/p>\n\n\n\n<ul>\n<li><strong>Precision (Churn=1)<\/strong>&nbsp;: 0.81\u3002\u76f8\u6bd4\u903b\u8f91\u56de\u5f52\u76840.58\uff0c\u6709\u4e86<strong>\u5de8\u5927\u63d0\u5347<\/strong>\uff01\u8fd9\u610f\u5473\u7740\u6a21\u578b\u9884\u6d4b\u4e3a\u201c\u6d41\u5931\u201d\u7684\u7528\u6237\u4e2d\uff0c81%\u90fd\u662f\u771f\u6d41\u5931\uff0c\u5927\u5927\u51cf\u5c11\u4e86\u8425\u9500\u8d44\u6e90\u7684\u6d6a\u8d39\u3002<\/li>\n\n\n\n<li><strong>Recall (Churn=1)<\/strong>&nbsp;: 0.87\u3002\u4f9d\u7136\u4fdd\u6301\u4e86\u975e\u5e38\u9ad8\u7684\u53ec\u56de\u7387\uff0c\u80fd\u627e\u51fa\u7edd\u5927\u591a\u6570\u7684\u6f5c\u5728\u6d41\u5931\u7528\u6237\u3002<\/li>\n\n\n\n<li><strong>F1-Score (Churn=1)<\/strong>&nbsp;: 0.84\u3002\u76f8\u6bd4\u903b\u8f91\u56de\u5f52\u76840.69\uff0c\u7efc\u5408\u6027\u80fd<strong>\u663e\u8457\u63d0\u9ad8<\/strong>\u3002<\/li>\n<\/ul>\n\n\n\n<p><strong>\u7ed3\u8bba<\/strong>\uff1a\u901a\u8fc7\u4f7f\u7528XGBoost\u6a21\u578b\u548c\u66f4\u4e30\u5bcc\u7684\u7279\u5f81\uff0c\u6211\u4eec\u6784\u5efa\u4e86\u4e00\u4e2a<strong>\u8fdc\u6bd4\u57fa\u7ebf\u6a21\u578b\u66f4\u7cbe\u51c6\u3001\u66f4\u9ad8\u6548<\/strong>\u7684\u9884\u8b66\u7cfb\u7edf\u3002<\/p>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" loading=\"lazy\" width=\"545\" height=\"448\" src=\"http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-1.png\" alt=\"\" class=\"wp-image-4035\" srcset=\"http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-1.png 545w, http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-1-300x247.png 300w, http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-1-365x300.png 365w\" sizes=\"(max-width: 545px) 100vw, 545px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_%E7%89%B9%E5%BE%81%E9%87%8D%E8%A6%81%E6%80%A7%E5%88%86%E6%9E%90_XGBoost\"><\/span><strong>2. \u7279\u5f81\u91cd\u8981\u6027\u5206\u6790 (XGBoost)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>XGBoost\u53ef\u4ee5\u63d0\u4f9b\u66f4\u53ef\u9760\u7684\u7279\u5f81\u91cd\u8981\u6027\u6392\u5e8f\u3002<\/p>\n\n\n\n<p>python<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u83b7\u53d6\u7279\u5f81\u91cd\u8981\u6027\nfeature_importance_df = pd.DataFrame({\n    'feature': X.columns,\n    'importance': model_xgb.feature_importances_\n}).sort_values('importance', ascending=False)\n\n# \u53ef\u89c6\u5316\nplt.figure(figsize=(12, 8))\nsns.barplot(x='importance', y='feature', data=feature_importance_df)\nplt.title('XGBoost \u7279\u5f81\u91cd\u8981\u6027\u5206\u6790')\nplt.show()<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote\">\n<p><strong>\u6df1\u5ea6\u6d1e\u5bdf<\/strong>:<\/p>\n\n\n\n<ul>\n<li><code>days_since_last_purchase<\/code>&nbsp;\u4ecd\u7136\u662f\u6700\u91cd\u8981\u7684\u7279\u5f81\uff0c\u5176\u91cd\u8981\u6027\u8fdc\u8d85\u5176\u4ed6\u3002<\/li>\n\n\n\n<li><strong>\u65b0\u7279\u5f81\u7684\u91cd\u8981\u6027\u51f8\u663e<\/strong>\uff1a<code>add_to_cart_rate<\/code>&nbsp;\u548c&nbsp;<code>coupon_usage_rate<\/code>&nbsp;\u7684\u91cd\u8981\u6027\u6392\u5728\u524d\u5217\uff0c\u8bc1\u660e\u4e86\u5f15\u5165\u8fd9\u4e9b\u7ec6\u7c92\u5ea6\u884c\u4e3a\u7279\u5f81\u7684\u5de8\u5927\u4ef7\u503c\u3002<\/li>\n\n\n\n<li><code>tenure_months<\/code>&nbsp;\u548c&nbsp;<code>total_purchases<\/code>&nbsp;\u4f5c\u4e3a\u7528\u6237\u5fe0\u8bda\u5ea6\u7684\u4ee3\u7406\u6307\u6807\uff0c\u4f9d\u7136\u662f\u5173\u952e\u7684\u4fdd\u62a4\u56e0\u7d20\u3002<\/li>\n\n\n\n<li>\u54c1\u7c7b\u504f\u597d (<code>preferred_category_*<\/code>) \u4e5f\u5177\u6709\u4e00\u5b9a\u7684\u9884\u6d4b\u80fd\u529b\u3002<\/li>\n<\/ul>\n<\/blockquote>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"552\" src=\"http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-2-1024x552.png\" alt=\"\" class=\"wp-image-4036\" srcset=\"http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-2-1024x552.png 1024w, http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-2-300x162.png 300w, http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-2-768x414.png 768w, http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-2-556x300.png 556w, http:\/\/viplao.com\/wp-content\/uploads\/2025\/10\/image-2.png 1101w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A8%A1%E5%9D%97%E5%85%AD%EF%BC%9A%E9%83%A8%E7%BD%B2%E4%B8%8E%E8%A1%8C%E5%8A%A8%E5%BB%BA%E8%AE%AE_Advanced_Actionable_Insights\"><\/span><strong>\u6a21\u5757\u516d\uff1a\u90e8\u7f72\u4e0e\u884c\u52a8\u5efa\u8bae (Advanced Actionable Insights)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_%E9%83%A8%E7%BD%B2%E7%AD%96%E7%95%A5\"><\/span><strong>1. \u90e8\u7f72\u7b56\u7565<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>(\u4e0e\u4e0a\u4e00\u7248\u62a5\u544a\u7c7b\u4f3c) \u6838\u5fc3\u662f\u5c06\u6a21\u578b\u670d\u52a1\u5316(API)\u6216\u7528\u4e8e\u6279\u91cf\u9884\u6d4b\u3002XGBoost\u6a21\u578b\u6587\u4ef6\u4f1a\u7a0d\u5927\uff0c\u4f46\u9884\u6d4b\u901f\u5ea6\u4f9d\u7136\u5f88\u5feb\uff0c\u5b8c\u5168\u6ee1\u8db3\u7ebf\u4e0a\u8981\u6c42\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_%E5%9F%BA%E4%BA%8E%E6%B7%B1%E5%BA%A6%E6%B4%9E%E5%AF%9F%E7%9A%84%E8%A1%8C%E5%8A%A8%E5%BB%BA%E8%AE%AE\"><\/span><strong>2. \u57fa\u4e8e\u6df1\u5ea6\u6d1e\u5bdf\u7684\u884c\u52a8\u5efa\u8bae<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u6709\u4e86\u66f4\u7cbe\u51c6\u7684\u6a21\u578b\u548c\u66f4\u4e30\u5bcc\u7684\u7279\u5f81\uff0c\u6211\u4eec\u53ef\u4ee5\u5236\u5b9a\u201c\u6570\u636e\u9a71\u52a8\u7684\u7528\u6237\u753b\u50cf\u201d\u5e76\u8fdb\u884c<strong>\u4e2a\u6027\u5316\u5e72\u9884<\/strong>\u3002<\/p>\n\n\n\n<p><strong>\u7b56\u7565\u4e00\uff1a\u6784\u5efa\u6570\u636e\u9a71\u52a8\u7684\u7528\u6237\u753b\u50cf (Data-Driven Personas)<\/strong><\/p>\n\n\n\n<ol>\n<li><strong>\u4ef7\u683c\u654f\u611f\u578b\u6d41\u5931\u9884\u8b66\u7528\u6237<\/strong>:\n<ul>\n<li><strong>\u753b\u50cf<\/strong>:&nbsp;<code>coupon_usage_rate<\/code>\u9ad8 +&nbsp;<code>days_since_last_purchase<\/code>\u589e\u52a0\u3002<\/li>\n\n\n\n<li><strong>\u6d1e\u5bdf<\/strong>: \u4ed6\u4eec\u5bf9\u4ef7\u683c\u654f\u611f\uff0c\u53ef\u80fd\u662f\u56e0\u4e3a\u6700\u8fd1\u6ca1\u6709\u6536\u5230\u6ee1\u610f\u7684\u6298\u6263\u800c\u6c89\u9ed8\u3002<\/li>\n\n\n\n<li><strong>\u7b56\u7565<\/strong>:&nbsp;<strong>\u4e0d\u8981<\/strong>\u63a8\u9001\u5e38\u89c4\u7684\u9ad8\u4ef7\u503c\u633d\u7559\u5238\u3002\u5e94\u63a8\u9001\u201c\u591a\u4ef6\u591a\u6298\u201d\u3001\u201c\u54c1\u7c7b\u6ee1\u51cf\u201d\u6216\u201c\u8ba2\u9605\u6298\u6263\u201d\u7b49\u80fd\u8ba9\u4ed6\u4eec\u611f\u5230\u201c\u5360\u5230\u4fbf\u5b9c\u201d\u7684\u6d3b\u52a8\uff0c\u5e76\u5f3a\u8c03\u6027\u4ef7\u6bd4\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u8d2d\u7269\u610f\u5411\u51cf\u9000\u578b\u6d41\u5931\u9884\u8b66\u7528\u6237<\/strong>:\n<ul>\n<li><strong>\u753b\u50cf<\/strong>:&nbsp;<code>add_to_cart_rate<\/code>\u8fd1\u671f\u4e0b\u964d +&nbsp;<code>page_views_per_session<\/code>\u51cf\u5c11\u3002<\/li>\n\n\n\n<li><strong>\u6d1e\u5bdf<\/strong>: \u4ed6\u4eec\u4e0d\u518d\u79ef\u6781\u63a2\u7d22\u548c\u52a0\u8d2d\uff0c\u53ef\u80fd\u5bf9\u73b0\u6709\u5546\u54c1\u5931\u53bb\u5174\u8da3\u6216\u88ab\u7ade\u54c1\u5438\u5f15\u3002<\/li>\n\n\n\n<li><strong>\u7b56\u7565<\/strong>: \u89e6\u53d1**\u201c\u65b0\u54c1\u63a8\u8350\u201d** \u548c**\u201c\u4e2a\u6027\u5316\u63a8\u8350\u201d** \u90ae\u4ef6\/\u63a8\u9001\u3002\u6839\u636e\u5176<code>preferred_category<\/code>\uff0c\u5411\u201c\u65f6\u5c1a\u201d\u7528\u6237\u63a8\u9001\u65b0\u5b63\u670d\u88c5\uff0c\u5411\u201c\u7535\u5b50\u201d\u7528\u6237\u63a8\u9001\u65b0\u53d1\u5e03\u7684\u5c0f\u5de5\u5177\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>\u6838\u5fc3\u7528\u6237\u6d41\u5931\u9884\u8b66 (\u9ad8\u4ef7\u503c\u98ce\u9669\u7528\u6237)<\/strong>&nbsp;:\n<ul>\n<li><strong>\u753b\u50cf<\/strong>:&nbsp;<code>tenure_months<\/code>\u957f +&nbsp;<code>total_spend<\/code>\u9ad8 + \u4f46<code>days_since_last_purchase<\/code>\u5f00\u59cb\u663e\u8457\u589e\u52a0\u3002<\/li>\n\n\n\n<li><strong>\u6d1e\u5bdf<\/strong>: \u8fd9\u662f\u6700\u5371\u9669\u7684\u4fe1\u53f7\uff01\u6838\u5fc3\u7528\u6237\u7684\u6d41\u5931\u635f\u5931\u5de8\u5927\u3002<\/li>\n\n\n\n<li><strong>\u7b56\u7565<\/strong>:&nbsp;<strong>\u7acb\u5373\u542f\u52a8\u4eba\u5de5\u5e72\u9884<\/strong>\u3002\u7531VIP\u5ba2\u670d\u56e2\u961f\u53d1\u8d77\u7535\u8bdd\u56de\u8bbf\uff0c\u4e86\u89e3\u5176\u9047\u5230\u7684\u95ee\u9898\uff08\u53ef\u80fd\u662f\u67d0\u6b21\u7cdf\u7cd5\u7684\u8d2d\u7269\u4f53\u9a8c\uff09\uff0c\u5e76\u6388\u4e88\u5927\u989d\u5ea6\u7684\u201c\u4e13\u9879\u633d\u7559\u5238\u201d\uff0c\u8868\u8fbe\u5e73\u53f0\u7684\u91cd\u89c6\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p><strong>\u7b56\u7565\u4e8c\uff1a\u81ea\u52a8\u5316\u8425\u9500\u4e0eA\/B\u6d4b\u8bd5\u5e73\u53f0<\/strong><\/p>\n\n\n\n<ul>\n<li>\u5c06\u4e0a\u8ff0\u7b56\u7565\u914d\u7f6e\u5230\u8425\u9500\u81ea\u52a8\u5316\u5de5\u5177\u4e2d\uff0c\u521b\u5efa\u89e6\u53d1\u89c4\u5219\u3002\u4f8b\u5982\uff1a\n<ul>\n<li><code>IF (days_since_last_purchase &gt; 60 AND coupon_usage_rate &gt; 0.7) THEN send 'Price-Sensitive' campaign.<\/code><\/li>\n\n\n\n<li><code>IF (add_to_cart_rate_last_30d &lt; 0.1 AND tenure_months &gt; 6) THEN send 'Engagement' campaign.<\/code><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u5bf9\u6240\u6709\u633d\u7559\u7b56\u7565\u8fdb\u884c\u4e25\u683c\u7684A\/B\u6d4b\u8bd5\uff0c\u8bbe\u7acb\u5bf9\u7167\u7ec4\uff08\u4e0d\u91c7\u53d6\u4efb\u4f55\u63aa\u65bd\uff09\uff0c\u7cbe\u786e\u5ea6\u91cf\u6bcf\u4e2a\u7b56\u7565\u7684** uplift\uff08\u63d0\u5347\u6548\u679c\uff09** \u548c<strong>ROI\uff08\u6295\u8d44\u56de\u62a5\u7387\uff09<\/strong>&nbsp;\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_%E6%80%BB%E7%BB%93\"><\/span><strong>3. \u603b\u7ed3<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>\u672c\u6b21\u5347\u7ea7\u901a\u8fc7\u5f15\u5165\u66f4\u4e30\u5bcc\u7684\u884c\u4e3a\u7279\u5f81\u548c\u91c7\u7528\u66f4\u5f3a\u5927\u7684XGBoost\u6a21\u578b\uff0c\u4e0d\u4ec5\u5c06\u7528\u6237\u6d41\u5931\u9884\u6d4b\u7684\u51c6\u786e\u7387\u63d0\u5347\u5230\u4e86\u4e00\u4e2a\u65b0\u7684\u6c34\u5e73\uff0c\u66f4\u91cd\u8981\u7684\u662f\uff0c\u5b83\u4e3a\u6211\u4eec\u63ed\u793a\u4e86\u4e0d\u540c\u7528\u6237\u6d41\u5931\u80cc\u540e\u7684<strong>\u5dee\u5f02\u5316\u539f\u56e0<\/strong>\u3002\u8fd9\u4f7f\u5f97\u6211\u4eec\u4e2a\u6027\u5316\u7528\u6237\u8fd0\u8425\u6548\u679c\u66f4\u597d\uff0c\u6700\u7ec8\u5b9e\u73b0\u5546\u4e1a\u4ef7\u503c\u7684\u6700\u5927\u5316\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6a21\u5757\u4e00\uff1a\u4e1a\u52a1\u7406\u89e3 (Business Understanding) 1. \u4e1a\u52a1\u80cc\u666f\u4e0e\u75db\u70b9 \u5728\u7ade\u4e89\u6fc0\u70c8&hellip; <a href=\"http:\/\/viplao.com\/index.php\/2025\/10\/12\/%e3%80%90python%e5%ae%9e%e8%b7%b5%e6%a1%88%e4%be%8b%e3%80%91%e7%94%b5%e5%95%86%e5%b9%b3%e5%8f%b0%e7%94%a8%e6%88%b7%e6%b5%81%e5%a4%b1%e9%a2%84%e8%ad%a6%e5%88%86%e6%9e%90%e6%8a%a5%e5%91%8a\/\" class=\"more-link read-more\" rel=\"bookmark\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">\u3010Python\u5b9e\u8df5\u6848\u4f8b\u3011\u7535\u5546\u5e73\u53f0\u7528\u6237\u6d41\u5931\u9884\u8b66\u5206\u6790\u62a5\u544a<\/span><i class=\"fa fa-arrow-right\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[28],"views":663,"_links":{"self":[{"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/posts\/4033"}],"collection":[{"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/comments?post=4033"}],"version-history":[{"count":4,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/posts\/4033\/revisions"}],"predecessor-version":[{"id":4046,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/posts\/4033\/revisions\/4046"}],"wp:attachment":[{"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/media?parent=4033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/categories?post=4033"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/viplao.com\/index.php\/wp-json\/wp\/v2\/tags?post=4033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}