PDF Official PDF 处理

# PDF 处理指南 ## 概览 本指南涵盖了使用 Python 库和命令行工具进行的基本 PDF 处理操作。有关高级功能、JavaScript 库和详细示例，请参阅 REFERENCE.md。如果您需要填写 PDF 表单，请阅读 FORMS.md 并遵循其中的说明。 ## 快速入门 python from pypdf import PdfReader, PdfWriter # 读取 PDF reader = PdfReader("document.pdf") print(f"页数: {len(reader.pages)}") # 提取文本 text = "" for page in reader.pages: text += page.extract_text() ## Python 库 ### pypdf - 基础操作 #### 合并 PDF python from pypdf import PdfWriter, PdfReader writer = PdfWriter() for pdf_file in ["doc1.pdf", "doc2.pdf", "doc3.pdf"]: reader = PdfReader(pdf_file) for page in reader.pages: writer.add_page(page) with open("merged.pdf", "wb") as output: writer.write(output) #### 拆分 PDF python reader = PdfReader("input.pdf") for i, page in enumerate(reader.pages): writer = PdfWriter() writer.add_page(page) with open(f"page_{i+1}.pdf", "wb") as output: writer.write(output) #### 提取元数据 python reader = PdfReader("document.pdf") meta = reader.metadata print(f"标题: {meta.title}") print(f"作者: {meta.author}") print(f"主题: {meta.subject}") print(f"创建者: {meta.creator}") #### 旋转页面 python reader = PdfReader("input.pdf") writer = PdfWriter() page = reader.pages[0] page.rotate(90) # 顺时针旋转 90 度 writer.add_page(page) with open("rotated.pdf", "wb") as output: writer.write(output) ### pdfplumber - 文本与表格提取 #### 提取带布局的文本 python import pdfplumber with pdfplumber.open("document.pdf") as pdf: for page in pdf.pages: text = page.extract_text() print(text) #### 提取表格 python with pdfplumber.open("document.pdf") as pdf: for i, page in enumerate(pdf.pages): tables = page.extract_tables() for j, table in enumerate(tables): print(f"第 {i+1} 页的第 {j+1} 个表格:") for row in table: print(row) #### 高级表格提取 python import pandas as pd with pdfplumber.open("document.pdf") as pdf: all_tables = [] for page in pdf.pages: tables = page.extract_tables() for table in tables: if table: # 检查表格是否为空 df = pd.DataFrame(table[1:], columns=table[0])