Pdf

PDF Processing 图形界面de Overview

This 图形界面de covers essential PDF processing operations using Python libraries and command-line 工具s. For advanced features, JavaScript libraries, and detAIled examples, see reference.md. If you need to fill out a PDF form, read forms.md and follow its instructions.

Quick 启动 from pypdf 导入 PdfReader, PdfWriter

# Read a PDF reader = PdfReader("document.pdf") print(f"Pages: {len(reader.pages)}")

# 提取 text text = "" for page in reader.pages: text += page.提取_text()

Python Libraries pypdf - Basic Operations Merge PDFs from pypdf 导入 PdfWriter, PdfReader

writer = PdfWriter() for pdf_file in ["doc1.pdf", "doc2.pdf", "doc3.pdf"]: reader = PdfReader(pdf_file) for page in reader.pages: writer.添加_page(page)

with open("merged.pdf", "wb") as 输出: writer.write(输出)

Split PDF reader = PdfReader("输入.pdf") for i, page in enumerate(reader.pages): writer = PdfWriter() writer.添加_page(page) with open(f"page_{i+1}.pdf", "wb") as 输出: writer.write(输出)

提取 Metadata reader = PdfReader("document.pdf") meta = reader.metadata print(f"Title: {meta.title}") print(f"Author: {meta.author}") print(f"Subject: {meta.subject}") print(f"创建器: {meta.创建器}")

Rotate Pages reader = PdfReader("输入.pdf") writer = PdfWriter()

page = reader.pages[0] page.rotate(90) # Rotate 90 degrees clockwise writer.添加_page(page)

with open("rotated.pdf", "wb") as 输出: writer.write(输出)

pdfplumber - Text and Table 提取ion 提取 Text with Layout 导入 pdfplumber

with pdfplumber.open("document.pdf") as pdf: for page in pdf.pages: text = page.提取_text() print(text)

提取 Tables with pdfplumber.open("document.pdf") as pdf: for i, page in enumerate(pdf.pages): tables = page.提取_tables() for j, table in enumerate(tables): print(f"Table {j+1} on page {i+1}:") for row in table: print(row)

Advanced Table 提取ion 导入 pandas as pd

with pdfplumber.open("document.pdf") as pdf: all_tables = [] for page in pdf.pages: tables = page.提取_tables() for table in tables: if table: # 检查 if table is not empty df = pd.DataFrame(table[1:], columns=table[0]) all_tables.应用end(df)

# Combine all tables if all_tables: combined_df = pd.concat(all_tables, ignore_索引=True) combined_df.to_excel("提取ed_tables.xlsx", 索引=False)

报告lab - 创建 PDFs Basic PDF Creation from 报告lab.lib.pagesizes 导入 letter from 报告lab.pdfgen 导入 canvas

c = canvas.Canvas("hello.pdf", pagesize=letter) width, height = letter

# 添加 text c.drawString(100, height - 100, "Hello World!") c.drawString(100, height - 120, "This is a PDF 创建d with 报告lab")

# 添加 a line c.line(100, height - 140, 400, height - 140)

# Save c.save()

创建 PDF with Multiple Pages from 报告lab.lib.pagesizes 导入 letter from 报告lab.platypus 导入 SimpleDocTemplate, Paragraph, Spacer, PageBreak from 报告lab.lib.styles 导入 获取SampleStyleSheet

doc = SimpleDocTemplate("报告.pdf", pagesize=letter) styles = 获取SampleStyleSheet() story = []

# 添加 content title = Paragraph("报告 Title", styles['Title']) story.应用end(title) story.应用end(Spacer(1, 12))

body = Paragraph("This is the body of the 报告. " * 20, styles['Normal']) story.应用end(body) story.应用end(PageBreak())

# Page 2 story.应用end(Paragraph("Page 2", styles['Heading1'])) story.应用end(Paragraph("Content for page 2", styles['Normal']))

# Build PDF doc.build(story)

Command-Line 工具s pdftotext (poppler-utils) # 提取 text pdftotext 输入.pdf 输出.txt

# 提取 text preserving layout pdftotext -layout 输入.pdf 输出.txt

# 提取 specific pages pdftotext -f 1 -l 5 输入.pdf 输出.txt # Pages 1-5

qpdf # Merge PDFs qpdf --empty --pages file1.pdf file2.pdf -- merged.pdf

# Split pages qpdf 输入.pdf --pages . 1-5 -- pages1-5.pdf qpdf 输入.pdf --pages . 6-10 -- pages6-10.pdf

# Rotate pages qpdf 输入.pdf 输出.pdf --rotate=+90:1 # Rotate page 1 by 90 degrees

# 移除 password qpdf --password=mypassword --解密 加密ed.pdf 解密ed.pdf

pdftk (if avAIlable) # Merge pdftk file1.pdf file2.pdf cat 输出 merged.pdf

# Split pdftk 输入.pdf burst

# Rotate pdftk 输入.pdf rotate 1east 输出 rotated.pdf

Common Tasks 提取 Text from 扫描ned PDFs # Requires: pip 安装 pytesseract pdf2image 导入 pytesseract from pdf2image 导入 convert_from_path

# Convert PDF to images images = convert_from_path('扫描ned.pdf')

# OCR each page text = "" for i, image in enumerate(images): text += f"Page {i+1}:\n" text += pytesseract.image_to_string(image) text += "\n\n"

print(text)

添加 Watermark from pypdf 导入 PdfReader, PdfWriter

# 创建 watermark (or load existing) watermark = PdfReader("watermark.pdf").pages[0]

# 应用ly to all pages reader = PdfReader("document.pdf") writer = PdfWriter()

for page