{ "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "# PDF 页面范围提取工具\n", "\n", "使用 PyPDF2（或更现代的 pypdf）来提取指定页面范围。\n", "\n", "**操作步骤：**\n", "1. 运行第一个代码块安装依赖（只需运行一次）\n", "2. 运行第二个代码块上传 PDF 文件\n", "3. 输入页面范围（例如 `1-5`、`10`、`3-8,12,15-20`）\n", "4. 下载提取后的 PDF" ] }, { "cell_type": "code", "execution_count": 17, "metadata": {}, "outputs": [ { "ename": "SyntaxError", "evalue": "Missing parentheses in call to 'print'. Did you mean print(...)? (__init__.py, line 242)", "output_type": "error", "traceback": [ "Traceback \u001b[0;36m(most recent call last)\u001b[0m:\n", "\u001b[0m File \u001b[1;32m~/anaconda3/envs/eval_xx/lib/python3.10/site-packages/IPython/core/interactiveshell.py:3577\u001b[0m in \u001b[1;35mrun_code\u001b[0m\n exec(code_obj, self.user_global_ns, self.user_ns)\u001b[0m\n", "\u001b[0;36m Cell \u001b[0;32mIn[17], line 8\u001b[0;36m\n\u001b[0;31m import fitz # PyMuPDF\u001b[0;36m\n", "\u001b[0;36m File \u001b[0;32m~/anaconda3/envs/eval_xx/lib/python3.10/site-packages/fitz/__init__.py:242\u001b[0;36m\u001b[0m\n\u001b[0;31m print \"Could not find any workflows matching %s\" % wf_name\u001b[0m\n\u001b[0m ^\u001b[0m\n\u001b[0;31mSyntaxError\u001b[0m\u001b[0;31m:\u001b[0m Missing parentheses in call to 'print'. Did you mean print(...)?\n" ] } ], "source": [ "from PyPDF2 import PdfReader, PdfWriter\n", "import os\n", "\n", "def extract_pdf_pages(input_path: str, output_path: str, page_range: str) -> None:\n", " \"\"\"\n", " 提取PDF指定范围的页面并保存为新PDF\n", "\n", " 参数:\n", " input_path: 输入PDF文件的路径（相对路径或绝对路径）\n", " output_path: 输出新PDF的路径\n", " page_range: 页面范围字符串，支持格式：\n", " - 单页：\"5\"（提取第5页，注意：PDF页码从1开始）\n", " - 连续页：\"3-7\"（提取第3到7页，包含首尾）\n", " - 不连续页：\"2,4,6-8\"（提取第2、4、6-8页）\n", " \"\"\"\n", " # 验证输入文件是否存在\n", " if not os.path.exists(input_path):\n", " raise FileNotFoundError(f\"输入文件不存在：{input_path}\")\n", " \n", " # 验证输入文件是否为PDF\n", " if not input_path.lower().endswith(\".pdf\"):\n", " raise ValueError(\"输入文件必须是PDF格式（.pdf后缀）\")\n", " \n", " # 读取PDF\n", " reader = PdfReader(input_path)\n", " total_pages = len(reader.pages)\n", " print(f\"原PDF总页数：{total_pages}\")\n", "\n", " # 解析页面范围，转换为0-based索引（PyPDF2内部用0开始计数）\n", " target_pages = set()\n", " parts = page_range.replace(\" \", \"\").split(\",\") # 去除空格并按逗号分割\n", "\n", " for part in parts:\n", " if \"-\" in part:\n", " # 处理连续页（如 \"3-7\"）\n", " try:\n", " start_str, end_str = part.split(\"-\")\n", " start = int(start_str)\n", " end = int(end_str)\n", " except ValueError:\n", " raise ValueError(f\"无效的页面范围格式：{part}（请使用数字，如3-7）\")\n", " \n", " # 验证页码合法性\n", " if start < 1 or end < 1:\n", " raise ValueError(\"页码必须大于等于1\")\n", " if start > end:\n", " raise ValueError(f\"连续页起始页码不能大于结束页码：{part}\")\n", " if end > total_pages:\n", " raise ValueError(f\"结束页码{end}超出原PDF总页数{total_pages}\")\n", " \n", " # 转换为0-based索引，添加范围内所有页码\n", " for page_num in range(start - 1, end):\n", " target_pages.add(page_num)\n", " else:\n", " # 处理单页（如 \"5\"）\n", " try:\n", " page_num = int(part)\n", " except ValueError:\n", " raise ValueError(f\"无效的页码格式：{part}（请使用数字）\")\n", " \n", " # 验证页码合法性\n", " if page_num < 1 or page_num > total_pages:\n", " raise ValueError(f\"页码{page_num}超出范围（1-{total_pages}）\")\n", " \n", " # 转换为0-based索引\n", " target_pages.add(page_num - 1)\n", "\n", " # 排序目标页码（保证输出顺序与原PDF一致）\n", " target_pages = sorted(target_pages)\n", " print(f\"即将提取的页面（原PDF页码）：{[num + 1 for num in target_pages]}\")\n", "\n", " # 写入提取的页面到新PDF\n", " writer = PdfWriter()\n", " for page_idx in target_pages:\n", " writer.add_page(reader.pages[page_idx])\n", "\n", " # 保存新PDF\n", " with open(output_path, \"wb\") as output_file:\n", " writer.write(output_file)\n", " \n", " print(f\"提取完成！新PDF已保存至：{os.path.abspath(output_path)}\")\n", "\n", "if __name__ == \"__main__\":\n", " # 交互式输入配置\n", " print(\"=\" * 50)\n", " print(\" PDF页面提取工具（支持单页/连续页/不连续页）\")\n", " print(\"=\" * 50)\n", " \n", " # 输入PDF路径\n", " while True:\n", " input_pdf = input(\"\\n请输入原PDF文件路径（相对路径或绝对路径）：\").strip()\n", " if os.path.exists(input_pdf) and input_pdf.lower().endswith(\".pdf\"):\n", " break\n", " print(\"❌ 无效路径！请确保文件存在且是PDF格式（.pdf后缀）\")\n", " \n", " # 输入页面范围\n", " while True:\n", " page_range = input(\"\\n请输入要提取的页面范围（格式示例：5 或 3-7 或 2,4,6-8）：\").strip()\n", " try:\n", " # 预验证格式（复用解析逻辑）\n", " parts = page_range.replace(\" \", \"\").split(\",\")\n", " for part in parts:\n", " if \"-\" in part:\n", " start, end = part.split(\"-\")\n", " int(start), int(end)\n", " else:\n", " int(part)\n", " break\n", " except ValueError:\n", " print(\"❌ 无效格式！请按照示例输入（如：5 或 3-7 或 2,4,6-8）\")\n", " \n", " # 输入输出路径\n", " output_pdf = input(\"\\n请输入输出PDF文件路径（如：output.pdf）：\").strip()\n", " if not output_pdf.lower().endswith(\".pdf\"):\n", " output_pdf += \".pdf\" # 自动添加后缀\n", " if os.path.exists(output_pdf):\n", " overwrite = input(f\"⚠️ 文件 {output_pdf} 已存在，是否覆盖？（y/n）：\").strip().lower()\n", " if overwrite != \"y\":\n", " print(\"🛑 操作取消\")\n", " exit()\n", " \n", " # 执行提取\n", " try:\n", " extract_pdf_pages(input_pdf, output_pdf, page_range)\n", " except Exception as e:\n", " print(f\"❌ 提取失败：{str(e)}\")" ] } ], "metadata": { "kernelspec": { "display_name": "Python 3", "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": "3.10.0" } }, "nbformat": 4, "nbformat_minor": 5 }