Upload New File

DT_python_learning.ipynb

+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "f68b858d",
+   "metadata": {},
+   "source": [
+    "# 8.18 Day1 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "fb223e09",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>使用 Jupyter 创建一个 .ipynb 文件，输出 \"Hello, Jupyter!\"，并观察输出格式。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "d4c0d92a",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Hello Jupyter\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"Hello Jupyter\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "8d0de4b9",
+   "metadata": {},
+   "source": [
+    "# 8.19 Day2 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0090a031",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>1.创建5个不同类型的变量（整数、浮点数、字符串、布尔值）并输出它们的类型。<br>2.给定一个整数和一个浮点数，将它们相加并打印结果。（使用ipynb格式的文件）"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "c8bc57a6",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "1 <class 'int'>\n",
+      "1.2 <class 'float'>\n",
+      "hello <class 'str'>\n",
+      "True <class 'bool'>\n",
+      "None <class 'NoneType'>\n",
+      "2.2\n"
+     ]
+    }
+   ],
+   "source": [
+    "a = 1\n",
+    "b = 1.2\n",
+    "c = \"hello\"\n",
+    "d = True\n",
+    "e = None\n",
+    "print(a, type(a))\n",
+    "print(b, type(b))\n",
+    "print(c, type(c))\n",
+    "print(d, type(d))\n",
+    "print(e, type(e))\n",
+    "print(a+b)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "6503ee1a",
+   "metadata": {},
+   "source": [
+    "# 8.20 Day3 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "82b88f85",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>编写程序，将一个浮点数转换为整数并输出结果，再将整数转换为字符串。（使用ipynb格式的文件）"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "d7576a0a",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "原始浮点数：\t5.3\t<class 'float'>\n",
+      "转换为整数：\t5\t<class 'int'>\n",
+      "转换为字符串：\t5\t<class 'str'>\n"
+     ]
+    }
+   ],
+   "source": [
+    "val_float = 5.3\n",
+    "vat_int = int(val_float)\n",
+    "vat_str = str(vat_int)\n",
+    "print(\"原始浮点数：\", val_float, type(val_float), sep='\\t')\n",
+    "print(\"转换为整数：\", vat_int, type(vat_int), sep='\\t')\n",
+    "print(\"转换为字符串：\", vat_str, type(vat_str), sep='\\t')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "62939667",
+   "metadata": {},
+   "source": [
+    "# 8.21 Day4 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "50450d23",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>\n",
+    "假设你是一名老师，需要计算一个学生的最终成绩。<br>\n",
+    "作业平均分 (homework_avg) = 85<br>\n",
+    "期中考试分 (midterm) = 78<br>\n",
+    "期末考试分 (final) = 92<br>\n",
+    "成绩计算规则：最终成绩 = 作业平均分 *  30% + 期中考试分 *  30% + 期末考试分 * 40%<br>\n",
+    "请编写一个 Python 程序，计算该学生的最终成绩（保留一位小数），并判断他是否通过了考试（最终成绩 >= 60）。<br>\n",
+    "要求：<br>\n",
+    "1.  使用变量存储上述分数。<br>\n",
+    "2.  使用算术运算符（*, +, /）计算最终成绩。<br>\n",
+    "3.  使用比较运算符（>=）判断是否通过。<br>\n",
+    "4.  使用 print() 函数输出结果。<br>\n",
+    "最后，在代码中添加适当的注释，描述每一步操作的功能。<br>"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "b8f96732",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "成绩为85.7，通过\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 使用变量存储分数\n",
+    "homework_avg = 85\n",
+    "midterm = 78\n",
+    "final = 92\n",
+    "# 使用算术运算符((*,+,/)计算最终成绩\n",
+    "score = homework_avg*0.3 + midterm*0.3 + final*0.4\n",
+    "# 使用比较运算符(>=)判断是否通过\n",
+    "if score>=60:\n",
+    "    # 使用 print()函数输出结果\n",
+    "    print(f\"成绩为{score}，通过\")\n",
+    "else:\n",
+    "    print(f\"成绩为{score}，不通过\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "80c7e07e",
+   "metadata": {},
+   "source": [
+    "# 8.22 Day5 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "e61b2853",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>定义一个字符串 s = \" Python is powerful. \"，先去除两端空格，转换为大写，再以空格分割成列表，最后将列表中的每个单词用连字符连接起来。（使用ipynb格式的文件）"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "19570fb6",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Python is powerful.\n",
+      " PYTHON IS POWERFUL. \n",
+      "['Python', 'is', 'powerful.']\n",
+      "Python-is-powerful.\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 1.定义一个字符串s;\n",
+    "s = \" Python is powerful. \"\n",
+    "# 2.去除两端空格;\n",
+    "print(s.strip())\n",
+    "# 3.转换为大写;\n",
+    "print(s.upper())\n",
+    "# 4.以空格分割成列表;\n",
+    "s_lst = s.split()\n",
+    "print(s_lst)\n",
+    "# 5.将列表中的每个单词用连字符`-`连接起来。\n",
+    "print(\"-\".join(s_lst))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d7eaa00d",
+   "metadata": {},
+   "source": [
+    "# 8.23 Day6 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "5b8add93",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>创建一个包含1到10的整数的列表，然后删除其中的偶数，最后将列表倒序排列。（使用ipynb格式的文件）"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "816b182d",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "创建列表 [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n",
+      "删除偶数 [1, 3, 5, 7, 9]\n",
+      "倒序排列 [9, 7, 5, 3, 1]\n"
+     ]
+    }
+   ],
+   "source": [
+    "lst = [i+1 for i in range(10)]\n",
+    "print(\"创建列表\", lst)\n",
+    "lst = [i for i in lst if i%2]\n",
+    "print(\"删除偶数\",lst)\n",
+    "lst.reverse()       # reverse()是一个原地操作，直接修改列表本身，而不是返回一个新的列表\n",
+    "print(\"倒序排列\", lst)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "38350b5e",
+   "metadata": {},
+   "source": [
+    "升级任务：<br>\n",
+    "编写一个程序，判断一个年份是否为闰年"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "21179721",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "2012 是闰年\n"
+     ]
+    }
+   ],
+   "source": [
+    "# 从键盘接收输入\n",
+    "year = int(input(\"请输入一个年份：\"))\n",
+    "# 判断闰年标准\n",
+    "if (year % 4 == 0 and year % 100 != 0) or (year % 400 == 0):\n",
+    "    print(f\"{year} 是闰年\")\n",
+    "else:\n",
+    "    print(f\"{year} 不是闰年\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0ba544d1",
+   "metadata": {},
+   "source": [
+    "# 8.25 Day7 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "8b9d2847",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>\n",
+    "1.创建一个元组并尝试访问其中的元素。<br>2.用集合去掉列表 [\"红\", \"蓝\", \"红\", \"黄\"] 里重复的东西。（使用ipynb格式的文件）"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "cab65222",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "原元组： (1, 2, 3, 4)\n",
+      "第一个元素 1\n",
+      "最后一个元素 4\n",
+      "前3个元素 (1, 2, 3)\n",
+      "* * * * * * * * * * * * * * * * * * * * \n",
+      "原列表： ['红', '蓝', '红', '黄']\n",
+      "去重后的列表： ['红', '蓝', '黄']\n"
+     ]
+    }
+   ],
+   "source": [
+    "test_tuple = (1, 2, 3, 4)\n",
+    "print(\"原元组：\", test_tuple)\n",
+    "print(\"第一个元素\", test_tuple[0])\n",
+    "print(\"最后一个元素\", test_tuple[-1])\n",
+    "print(\"前3个元素\", test_tuple[:3])\n",
+    "print(\"* \"*20)\n",
+    "color = [\"红\", \"蓝\", \"红\", \"黄\"]\n",
+    "print(\"原列表：\", color)\n",
+    "print(\"去重后的列表：\", list(set(color)))"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "15f95c4f",
+   "metadata": {},
+   "source": [
+    "# 8.26 Day8 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "767247f4",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>\n",
+    "创建一个字典，存储你的姓名、年龄和城市，然后添加一项“爱好”，（值为列表，包含至少两个爱好）。最后，打印出所有的键和值。（使用ipynb格式的文件）"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 22,
+   "id": "1cfdbbad",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "视图打印:\n",
+      "dict_keys(['姓名', '年龄', '城市', '爱好'])\n",
+      "dict_values(['栀柚', 18, '上海', ['唱歌', '跳舞']])\n",
+      "dict_items([('姓名', '栀柚'), ('年龄', 18), ('城市', '上海'), ('爱好', ['唱歌', '跳舞'])])\n",
+      "* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *  <class 'list'>\n",
+      "遍历打印:\n",
+      "姓名: 栀柚\n",
+      "年龄: 18\n",
+      "城市: 上海\n",
+      "爱好: ['唱歌', '跳舞']\n"
+     ]
+    }
+   ],
+   "source": [
+    "person = {\"姓名\":\"栀柚\", \"年龄\": 18, \"城市\": \"上海\"}\n",
+    "person[\"爱好\"] = [\"唱歌\", \"跳舞\"]\n",
+    "# 使用视图\n",
+    "print(\"视图打印:\", person.keys(), person.values(), person.items(), sep=\"\\n\")\n",
+    "\n",
+    "print(\"* \" * 50, type([\"唱歌\", \"跳舞\"]))\n",
+    "# 使用遍历\n",
+    "print(\"遍历打印:\")\n",
+    "for key, value in person.items():\n",
+    "    print(f\"{key}: {value}\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "13b55808",
+   "metadata": {},
+   "source": [
+    "# 8.27 Day9 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ecadf214",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>编写程序，根据用户输入的年龄，判断并输出是否为成年人。（使用ipynb格式的文件）"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "8181c05a",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "成年\n"
+     ]
+    }
+   ],
+   "source": [
+    "while True:\n",
+    "    try:\n",
+    "        age = int(input(\"请输入年龄：\"))\n",
+    "        if age < 0 :\n",
+    "            print(\"年龄不能为负数，请输入一个有效的年龄。\")\n",
+    "        else:\n",
+    "            if age < 18:\n",
+    "                print(\"未成年\")\n",
+    "            else:\n",
+    "                print(\"成年\")\n",
+    "            break\n",
+    "    except ValueError:\n",
+    "        print(\"请输入一个有效的数字。\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c000177d",
+   "metadata": {},
+   "source": [
+    "升级任务:<br>\n",
+    "【输入一个成绩（0-100），输出对应等级】： <br>\n",
+    "90-100: A<br>\n",
+    "80-89: B<br>\n",
+    "70-79: C<br>\n",
+    "60-69: D<br>\n",
+    "<60: F<br>\n",
+    "【要求】：使用 if-elif-else，并处理非法输入（如 >100 或 <0） <br>"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "id": "c52f029e",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "成绩为：70, 等级为：C\n"
+     ]
+    }
+   ],
+   "source": [
+    "try:\n",
+    "    score = int(input(\"输入一个成绩（0-100）：\"))\n",
+    "    if score<0 or score>100:\n",
+    "        print(\"输入成绩无效，请输入0到100之间的数字！\")\n",
+    "    elif score >= 90 :\n",
+    "        grade = \"A\"\n",
+    "        print(f\"成绩为：{score}, 等级为：{grade}\")\n",
+    "    elif score >= 80:\n",
+    "        grade = \"B\"\n",
+    "        print(f\"成绩为：{score}, 等级为：{grade}\")\n",
+    "    elif score >= 70:\n",
+    "        grade = \"C\"\n",
+    "        print(f\"成绩为：{score}, 等级为：{grade}\")\n",
+    "    elif score >= 60 :\n",
+    "        grade = \"D\"\n",
+    "        print(f\"成绩为：{score}, 等级为：{grade}\")\n",
+    "    else:\n",
+    "        grade = \"F\"\n",
+    "        print(f\"成绩为：{score}, 等级为：{grade}\")\n",
+    "    \n",
+    "except ValueError:\n",
+    "    print(\"输入无效，请输入一个数字！\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "eb260440",
+   "metadata": {},
+   "source": [
+    "# 8.28 Day10 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c66e2a0a",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>\n",
+    "1.使用 for 循环打印1到100中所有3的倍数。<br>2.使用 while 循环求1到100的总和。（使用ipynb格式的文件）"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "id": "9c0f8443",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "第一题:\n",
+      "3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60 63 66 69 72 75 78 81 84 87 90 93 96 99 \n",
+      "第二题:\n",
+      "1-100的总和是： 5050\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(\"第一题:\")\n",
+    "for i in range(1, 101):\n",
+    "    if i % 3 == 0:\n",
+    "        print(i, end=' ')\n",
+    "\n",
+    "print(\"\\n第二题:\")\n",
+    "\n",
+    "k = 1\n",
+    "sum = 0\n",
+    "while k <= 100:\n",
+    "    sum += k\n",
+    "    k += 1\n",
+    "print(\"1-100的总和是：\", sum)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "6b6d4684",
+   "metadata": {},
+   "source": [
+    "# 8.29 Day11 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "f4d6c2be",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>定义一个函数，计算两个数字的和，并返回结果。（使用ipynb格式的文件）"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "id": "f6d887d1",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "输入无效，请确保输入的是数字！\n"
+     ]
+    }
+   ],
+   "source": [
+    "def add(a, b):\n",
+    "    return a + b\n",
+    "\n",
+    "try:\n",
+    "    num1 = float(input(\"请输入第一个数字：\"))\n",
+    "    num2 = float(input(\"请输入第二个数字：\"))\n",
+    "    result = add(num1, num2)\n",
+    "    print(f\"{num1}和{num2}这两个数字的和是：{result}\")\n",
+    "except ValueError:\n",
+    "    print(\"输入无效，请确保输入的是数字！\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "aa30b2b9",
+   "metadata": {},
+   "source": [
+    "# 8.30 Day12 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "ab79fc8f",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>创建一个文本文件，写入3行你喜欢的名言。然后读取这个文件，并打印出每一行（带行号）。（使用ipynb格式的文件）"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "153f49c0",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "第1行:Data is the new oil, AI is the new electricity.\n",
+      "第2行:The future is already here — it’s just not evenly distributed yet.\n",
+      "第3行:The best preparation for tomorrow is doing your best today.\n"
+     ]
+    }
+   ],
+   "source": [
+    "path = r\"kp_open.txt\"\n",
+    "quotes = [\n",
+    "    \"Data is the new oil, AI is the new electricity.\", \n",
+    "    \"The future is already here — it’s just not evenly distributed yet.\",\n",
+    "    \"The best preparation for tomorrow is doing your best today.\"\n",
+    "]\n",
+    "with open(path, \"w\") as f:\n",
+    "    for quote in quotes:\n",
+    "        f.write(quote+\"\\n\")\n",
+    "with open(path, \"r\") as f:\n",
+    "    for i, line in enumerate(f.readlines()):\n",
+    "        print(f\"第{i+1}行:{line.strip()}\")\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "825dde22",
+   "metadata": {},
+   "source": [
+    "# 9.01 Day13 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "b8b5baae",
+   "metadata": {},
+   "source": [
+    "作业安排：<br>定义一个简单的类 Person，包含属性 name 和 age，以及方法 greet() 用来打印“你好，{name}！”。创建该类的实例并调用方法。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "afde388c",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "你好，栀柚! \n"
+     ]
+    }
+   ],
+   "source": [
+    "class Person:\n",
+    "    def __init__(self, name, age):\n",
+    "        self.name = name\n",
+    "        self.age = age\n",
+    "    \n",
+    "    def greet(self):\n",
+    "        print(f\"你好，{self.name}! \")\n",
+    "\n",
+    "p = Person(\"栀柚\", 18)\n",
+    "p.greet()"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "eedf4c8f",
+   "metadata": {},
+   "source": [
+    "# 9.02 Day14 学习打卡 栀柚"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "0f90a288",
+   "metadata": {},
+   "source": [
+    "## 项目一：简易记事本\n",
+    "\n",
+    "本项目实现一个命令行版的“记事本”程序。用户可以添加笔记、查看所有笔记，并在退出时自动保存到本地文件。下次启动时会自动加载历史记录。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "id": "7e7eee84",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "菜单：\n",
+      "1. 添加\n",
+      "2. 查看\n",
+      "3. 退出\n",
+      "无笔记\n",
+      "笔记已添加\n",
+      "笔记已保存，程序退出\n"
+     ]
+    }
+   ],
+   "source": [
+    "import os\n",
+    "\n",
+    "notes = []\n",
+    "if os.path.exists(\"notes.txt\"):\n",
+    "    with open(\"notes.txt\", \"r\", encoding=\"utf-8\") as f:\n",
+    "        print([note.split() for note in f.readlines()])\n",
+    "\n",
+    "print(\"\\n菜单：\")\n",
+    "print(\"1. 添加\")\n",
+    "print(\"2. 查看\")\n",
+    "print(\"3. 退出\")\n",
+    "\n",
+    "while True:\n",
+    "    choice = input(\"请输入（1/2/3）：\")\n",
+    "    if choice == \"1\":\n",
+    "        note = input(\"请输入笔记内容：\")\n",
+    "        notes.append(note)\n",
+    "        print(\"笔记已添加\")\n",
+    "    elif choice == \"2\":\n",
+    "        if notes:\n",
+    "            for i, note in enumerate(notes, 1):\n",
+    "                print(f\"{i}: {note}\")\n",
+    "        else:\n",
+    "            print(\"无笔记\")\n",
+    "    elif choice == \"3\":\n",
+    "        with open(\"notes.txt\", \"w\", encoding=\"utf-8\") as f:\n",
+    "            for note in notes:\n",
+    "                f.write(note+'\\n')\n",
+    "        print(\"笔记已保存，程序退出\")\n",
+    "        break\n",
+    "    else:\n",
+    "        print(\"无效的选择，请重新输入。\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "78f23e06",
+   "metadata": {},
+   "source": [
+    "## 项目二：学生成绩管理系统\n",
+    "\n",
+    "模拟一个学生成绩管理系统，支持多学生信息管理，自动计算平均分、等级和通过情况并进行统计分析。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "541716a8",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "学生成绩管理系统\n",
+      "姓名: 张三 | 数学: 95, 英语: 88, 语文: 90 | 平均分: 91.00 | 等级: A | 结果: 通过\n",
+      "姓名: 李四 | 数学: 60, 英语: 75, 语文: 70 | 平均分: 68.33 | 等级: D | 结果: 通过\n",
+      "姓名: 王五 | 数学: 85, 英语: 92, 语文: 90 | 平均分: 89.00 | 等级: B | 结果: 通过\n",
+      "姓名: 赵六 | 数学: 60, 英语: 58, 语文: 55 | 平均分: 57.67 | 等级: F | 结果: 未通过\n",
+      "姓名: 孙七 | 数学: 82, 英语: 75, 语文: 78 | 平均分: 78.33 | 等级: C | 结果: 通过\n",
+      "共有5名学生， 4人通过考试，最高平均分为91.0（张三）\n"
+     ]
+    }
+   ],
+   "source": [
+    "students = [\n",
+    "    {\"姓名\": \"张三\", \"语文\": 90, \"数学\": 95, \"英语\": 88},\n",
+    "    {\"姓名\": \"李四\", \"语文\": 70, \"数学\": 60, \"英语\": 75},\n",
+    "    {\"姓名\": \"王五\", \"语文\": 90, \"数学\": 85, \"英语\": 92},\n",
+    "    {\"姓名\": \"赵六\", \"语文\": 55, \"数学\": 60, \"英语\": 58},\n",
+    "    {\"姓名\": \"孙七\", \"语文\": 78, \"数学\": 82, \"英语\": 75}\n",
+    "]\n",
+    "def calculate_avg(socres):\n",
+    "    return sum(socres) / len(socres)\n",
+    "\n",
+    "def get_grade(socre):\n",
+    "    if socre >= 90:\n",
+    "        return 'A'\n",
+    "    elif socre >= 80:\n",
+    "        return 'B'\n",
+    "    elif socre >= 70:\n",
+    "        return 'C'\n",
+    "    elif socre >= 60:\n",
+    "        return 'D'\n",
+    "    else:\n",
+    "        return 'F'\n",
+    "\n",
+    "def print_details(students):\n",
+    "    for student in students:\n",
+    "        socres = [student['语文'], student['数学'], student['英语']]\n",
+    "        avg_score = calculate_avg(socres)\n",
+    "        grade = get_grade(avg_score)\n",
+    "        passed = '通过' if avg_score>=60 else '未通过'\n",
+    "        print(f\"姓名: {student['姓名']} | 数学: {student['数学']}, 英语: {student['英语']}, 语文: {student['语文']} | 平均分: {avg_score:.2f} | 等级: {grade} | 结果: {passed}\")\n",
+    "\n",
+    "def summary(students):\n",
+    "    total_students = len(students)\n",
+    "    passed_students = 0\n",
+    "    highest_score = 0\n",
+    "    highest_score_student = None\n",
+    "\n",
+    "    for student in students:\n",
+    "        socres = [student['语文'], student['数学'], student['英语']]\n",
+    "        avg_score = calculate_avg(socres)\n",
+    "        if avg_score >= 60:\n",
+    "            passed_students += 1\n",
+    "        if avg_score > highest_score:\n",
+    "            highest_score = avg_score\n",
+    "            highest_score_student = student['姓名']\n",
+    "    print(f\"共有{total_students}名学生， {passed_students}人通过考试，最高平均分为{highest_score:.1f}（{highest_score_student}）\")\n",
+    "\n",
+    "print('学生成绩管理系统')\n",
+    "print_details(students)\n",
+    "summary(students)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "739ec197",
+   "metadata": {},
+   "source": [
+    "## 项目三：猜数字游戏\n",
+    "\n",
+    "编写一个有趣的“猜数字”游戏:程序随机生成 1~100 的整数，玩家不断猜测，系统提示“太大”或“太小”，直到猜中为止。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "62f73f3e",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "猜数字游戏：1-100的整数\n",
+      "你的输入为50，太大了，再试试\n",
+      "你的输入为25，太小了，再试试\n",
+      "你的输入为38，太大了，再试试\n",
+      "你的输入为32，太大了，再试试\n",
+      "你的输入为28，太大了，再试试\n",
+      "你的输入为26，太小了，再试试\n",
+      "恭喜你！猜中了！答案是27。你用了7次。\n",
+      "结束\n"
+     ]
+    }
+   ],
+   "source": [
+    "import random\n",
+    "\n",
+    "while True:\n",
+    "    number = random.randint(1, 100)\n",
+    "    attempts = 0\n",
+    "    print(\"猜数字游戏：1-100的整数\")\n",
+    "\n",
+    "    while True:\n",
+    "        try:\n",
+    "            guess = int(input(\"请输入一个1-100的整数：\"))\n",
+    "            attempts += 1\n",
+    "\n",
+    "            if guess<1 or guess>100:\n",
+    "                print(\"请输入一个1-100的整数：\")\n",
+    "                continue\n",
+    "\n",
+    "            if guess < number:\n",
+    "                print(f\"你的输入为{guess}，太小了，再试试\")\n",
+    "            elif guess > number:\n",
+    "                print(f\"你的输入为{guess}，太大了，再试试\")\n",
+    "            else:\n",
+    "                print(f\"恭喜你！猜中了！答案是{number}。你用了{attempts}次。\")\n",
+    "                break\n",
+    "        except ValueError:\n",
+    "            print(\"请输入一个有效的数字。\")\n",
+    "    trymore = input(\"还继续玩吗?(y/n)\").strip().lower()\n",
+    "    if trymore != 'y':\n",
+    "        print('结束')\n",
+    "        break\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "b5a59ca0",
+   "metadata": {},
+   "source": [
+    "## 项目四：天气数据文本分析器\n",
+    "\n",
+    "本项目要求你对一个已有的天气数据文件 weather data.txt 进行分析,提取关键信息并生成一份完整的文本报告。你将练习如何从真实格式的文本中解析数据，并进行基础统计分析。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "41c2f1d3",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "天气数据分析报告\n",
+      "===================\n",
+      "最高温度: 20°C (广州, 2024-01-07)\n",
+      "最低温度: -5°C (北京, 2024-01-08)\n",
+      "\n",
+      "每个城市的平均温度:\n",
+      "北京: 0.25°C\n",
+      "上海: 10.00°C\n",
+      "广州: 19.00°C\n",
+      "\n",
+      "每种天气出现的次数:\n",
+      "晴: 4次\n",
+      "雪: 2次\n",
+      "雨: 2次\n",
+      "阴: 1次\n",
+      "多云: 1次\n"
+     ]
+    }
+   ],
+   "source": [
+    "import csv\n",
+    "from collections import defaultdict\n",
+    "\n",
+    "\n",
+    "def read_weather_data(file_path):\n",
+    "    with open(file_path, mode='r', encoding='utf-8') as file:\n",
+    "        reader = csv.DictReader(file)\n",
+    "        data = [row for row in reader]\n",
+    "    return data\n",
+    "\n",
+    "# 找出最高温和最低温的记录\n",
+    "def find_temperature_extremes(data):\n",
+    "\n",
+    "    highest_temp_record = max(data, key=lambda x: int(x['temperature']))\n",
+    "    lowest_temp_record = min(data, key=lambda x: int(x['temperature']))\n",
+    "\n",
+    "    return highest_temp_record, lowest_temp_record\n",
+    "\n",
+    "# 计算每个城市的平均温度\n",
+    "def calculate_average_temperatures(data):\n",
+    "    city_temperatures = defaultdict(list)\n",
+    "    for record in data:\n",
+    "        city = record['city']\n",
+    "        temp = int(record['temperature'])\n",
+    "        city_temperatures[city].append(temp)\n",
+    "    \n",
+    "    average_temperatures = {city: sum(temps) / len(temps) for city, temps in city_temperatures.items()}\n",
+    "    return average_temperatures\n",
+    "\n",
+    "# 统计每种天气出现的次数\n",
+    "def count_weather_occurrences(data):\n",
+    "    weather_counts = defaultdict(int)\n",
+    "    for record in data:\n",
+    "        weather = record['weather']\n",
+    "        weather_counts[weather] += 1\n",
+    "    return weather_counts\n",
+    "\n",
+    "# 输出\n",
+    "def generate_report(data):\n",
+    "    highest_temp_record, lowest_temp_record = find_temperature_extremes(data)\n",
+    "    average_temperatures = calculate_average_temperatures(data)\n",
+    "    weather_counts = count_weather_occurrences(data)\n",
+    "\n",
+    "    print(\"\\n天气数据分析报告\")\n",
+    "    print(\"===================\")\n",
+    "    print(f\"最高温度: {highest_temp_record['temperature']}°C ({highest_temp_record['city']}, {highest_temp_record['date']})\")\n",
+    "    print(f\"最低温度: {lowest_temp_record['temperature']}°C ({lowest_temp_record['city']}, {lowest_temp_record['date']})\")\n",
+    "    print(\"\\n每个城市的平均温度:\")\n",
+    "    for city, avg_temp in average_temperatures.items():\n",
+    "        print(f\"{city}: {avg_temp:.2f}°C\")\n",
+    "    print(\"\\n每种天气出现的次数:\")\n",
+    "    for weather, count in weather_counts.items():\n",
+    "        print(f\"{weather}: {count}次\")\n",
+    "\n",
+    "# 主程序\n",
+    "if __name__ == \"__main__\":\n",
+    "    file_path = 'weather_data.txt'\n",
+    "    weather_data = read_weather_data(file_path)\n",
+    "    generate_report(weather_data)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "b85b11cf",
+   "metadata": {},
+   "source": [
+    "## 项目五：简易图书馆里系统（面向对象版）\n",
+    "\n",
+    "使用面向对象方式实现一个图书管理系统，支持添加、删除、查找书籍，并将数据保存到 .txt 文本文件中实现持久化存储。"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "5e2b361b",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "\n",
+      "菜单：\n",
+      "1. 添加书籍\n",
+      "2. 删除书籍\n",
+      "3. 查找书籍\n",
+      "4. 显示所有书籍\n",
+      "5. 退出\n",
+      "馆藏共3本书\n",
+      "《五一》 | 作者：张三 | ISBN：5555\n",
+      "《端午》 | 作者：王五 | ISBN：6666\n",
+      "《周一》 | 作者：李四 | ISBN：7878\n",
+      "isbn为7878的书籍已删除。\n",
+      "馆藏共2本书\n",
+      "《五一》 | 作者：张三 | ISBN：5555\n",
+      "《端午》 | 作者：王五 | ISBN：6666\n",
+      "书籍《国庆》已添加。\n",
+      "馆藏共3本书\n",
+      "《五一》 | 作者：张三 | ISBN：5555\n",
+      "《端午》 | 作者：王五 | ISBN：6666\n",
+      "《国庆》 | 作者：赵六 | ISBN：1001\n",
+      "已找到与“一”相关的书籍：\n",
+      "《五一》 | 作者：张三 | ISBN：5555\n",
+      "退出程序。\n"
+     ]
+    }
+   ],
+   "source": [
+    "import os\n",
+    "class Book:\n",
+    "    def __init__(self, title, author, isbn):\n",
+    "        self.title = title\n",
+    "        self.author = author\n",
+    "        self.isbn = isbn\n",
+    "\n",
+    "    def __str__(self):\n",
+    "        return f\"《{self.title}》 | 作者：{self.author} | ISBN：{self.isbn}\"\n",
+    "\n",
+    "class Library:\n",
+    "    def __init__(self, filename='library.txt'):\n",
+    "        self.filename = filename\n",
+    "        self.books = self.load_books()\n",
+    "\n",
+    "    def load_books(self):\n",
+    "        if os.path.exists(self.filename):\n",
+    "            with open(self.filename, 'r', encoding='utf-8') as f:\n",
+    "                books = [Book(*line.strip().split('|')) for line in f.readlines()]\n",
+    "            return books\n",
+    "        return []\n",
+    "\n",
+    "    def save_books(self):\n",
+    "        with open(self.filename, 'w', encoding='utf-8') as f:\n",
+    "            for book in self.books:\n",
+    "                f.write(f\"{book.title}|{book.author}|{book.isbn}\\n\")\n",
+    "\n",
+    "    def add_book(self, book):\n",
+    "        self.books.append(book)\n",
+    "        self.save_books()\n",
+    "\n",
+    "    def remove_book(self, isbn):\n",
+    "        self.books = [book for book in self.books if book.isbn != isbn]\n",
+    "        self.save_books()\n",
+    "\n",
+    "    def find_by_title(self, title):\n",
+    "        return [book for book in self.books if title in book.title]\n",
+    "\n",
+    "    def display_all(self):\n",
+    "        print(f\"馆藏共{len(self.books)}本书\")\n",
+    "        for book in self.books:\n",
+    "            print(book)\n",
+    "\n",
+    "def main():\n",
+    "    library = Library()\n",
+    "    print(\"\\n菜单：\")\n",
+    "    print(\"1. 添加书籍\")\n",
+    "    print(\"2. 删除书籍\")\n",
+    "    print(\"3. 查找书籍\")\n",
+    "    print(\"4. 显示所有书籍\")\n",
+    "    print(\"5. 退出\")\n",
+    "    while True:\n",
+    "        choice = input(\"请根据菜单数字输入选项：\")\n",
+    "\n",
+    "        if choice == '1':\n",
+    "            title = input(\"输入书名：\")\n",
+    "            author = input(\"输入作者：\")\n",
+    "            isbn = input(\"输入ISBN：\")\n",
+    "            library.add_book(Book(title, author, isbn))\n",
+    "            print(f\"书籍《{title}》已添加。\")\n",
+    "\n",
+    "        elif choice == '2':\n",
+    "            isbn = input(\"输入要删除的书籍ISBN：\")\n",
+    "            title = library.remove_book(isbn)\n",
+    "            print(f\"isbn为{isbn}的书籍已删除。\")\n",
+    "\n",
+    "        elif choice == '3':\n",
+    "            title = input(\"输入要查找的书籍标题：\")\n",
+    "            results = library.find_by_title(title)\n",
+    "            if results:\n",
+    "                print(f\"已找到与“{title}”相关的书籍：\")\n",
+    "                for book in results:\n",
+    "                    print(book)\n",
+    "            else:\n",
+    "                print(\"未找到相关书籍。\")\n",
+    "\n",
+    "        elif choice == '4':\n",
+    "            library.display_all()\n",
+    "\n",
+    "        elif choice == '5':\n",
+    "            print(\"退出程序。\")\n",
+    "            break\n",
+    "        else:\n",
+    "            print(\"无效的选项，请重新输入。\")\n",
+    "\n",
+    "if __name__ == \"__main__\":\n",
+    "    main()"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "torch",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.23"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}