Update chapter_1_python_basic.ipynb

Fix chapter 1 typos

Author: vincentzli

chapter_1_python_basic.ipynb

@@ -11,7 +11,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## 1. 变量与数据类型"
+    "## 1. 变量与基本数据类型"
    ]
   },
   {
@@ -898,7 +898,7 @@
     "cell_type": "markdown",
     "metadata": {},
     "source": [
-     "### 4.1 列表推导式与生成器\n",
+     "### 4.3 列表推导式与生成器\n",
      "\n",
      "#### 列表推导式（List Comprehension）\n",
      "**语法结构**：\n",
@@ -993,7 +993,7 @@
     "cell_type": "markdown",
     "metadata": {},
     "source": [
-     "### 4.2 字典高级操作\n",
+     "### 4.4 字典高级操作\n",
      "\n",
      "#### 字典推导式（Dict Comprehension）\n",
      "**语法结构**：\n",
@@ -1092,7 +1092,7 @@
     "cell_type": "markdown",
     "metadata": {},
     "source": [
-     "### 4.3 集合操作（Set Operations）\n",
+     "### 4.5 集合操作（Set Operations）\n",
      "\n",
      "**核心特性**：\n",
      "- 无序的唯一元素集合\n",