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你想实现一个基于 Streamlit 的 PDF 编辑器，功能包括：

• PDF 转 Word
• PDF 表格提取
• PDF 拆分页面
• PDF 转图片

下面是一个初步的 Streamlit 应用框架代码示例，集成了以上功能。使用了常见库如 pdfplumber、PyMuPDF（fitz）、pdf2image、pdf2docx 等。

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✅ 安装依赖

pip install streamlit pdfplumber PyMuPDF pdf2image pdf2docx pandas pillow

还需安装 poppler 用于 pdf2image：

• Windows：下载地址
• macOS：brew install poppler
• Linux：sudo apt install poppler-utils

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✅ app.py 示例代码

import streamlit as st
import pdfplumber
import fitz  # PyMuPDF
from pdf2image import convert_from_path
from pdf2docx import Converter
import os
import tempfile
import pandas as pd
from PIL import Imagest.set_page_config(page_title="PDF 编辑器", layout="wide")st.title("📄 Streamlit PDF 编辑器")uploaded_file = st.file_uploader("上传 PDF 文件", type=["pdf"])if uploaded_file:with tempfile.NamedTemporaryFile(delete=False, suffix=".pdf") as tmp_file:tmp_file.write(uploaded_file.read())pdf_path = tmp_file.namest.success("PDF 上传成功")# 功能选择option = st.sidebar.selectbox("选择功能", ["📑 PDF 转 Word","📋 提取表格","🪓 拆分页面","🖼️ PDF 转图片"])# PDF 转 Wordif option == "📑 PDF 转 Word":docx_output = pdf_path.replace(".pdf", ".docx")if st.button("开始转换"):with st.spinner("正在转换..."):cv = Converter(pdf_path)cv.convert(docx_output, start=0, end=None)cv.close()st.success("转换完成")with open(docx_output, "rb") as f:st.download_button("下载 Word 文件", f, file_name="converted.docx")# 提取表格elif option == "📋 提取表格":page_num = st.number_input("选择页码", min_value=1, value=1)with pdfplumber.open(pdf_path) as pdf:if page_num <= len(pdf):page = pdf[page_num - 1]tables = page.extract_tables()if tables:for idx, table in enumerate(tables):df = pd.DataFrame(table[1:], columns=table[0])st.write(f"表格 {idx + 1}")st.dataframe(df)csv = df.to_csv(index=False).encode("utf-8")st.download_button(f"下载表格 {idx + 1}", csv, file_name=f"table_{idx + 1}.csv")else:st.warning("该页未检测到表格")# 拆分页面elif option == "🪓 拆分页面":doc = fitz.open(pdf_path)page_total = len(doc)st.write(f"PDF 共 {page_total} 页")selected_pages = st.multiselect("选择要拆分的页码", list(range(1, page_total + 1)))if st.button("拆分并下载"):for page_num in selected_pages:new_doc = fitz.open()new_doc.insert_pdf(doc, from_page=page_num - 1, to_page=page_num - 1)output_path = f"split_page_{page_num}.pdf"new_doc.save(output_path)with open(output_path, "rb") as f:st.download_button(f"下载 第{page_num}页", f, file_name=output_path)# PDF 转图片elif option == "🖼️ PDF 转图片":dpi = st.slider("选择分辨率 (DPI)", 50, 300, 150)st.info("每页将被转为 PNG 图片")if st.button("开始转换"):with st.spinner("转换中..."):images = convert_from_path(pdf_path, dpi=dpi)for i, img in enumerate(images):st.image(img, caption=f"Page {i+1}", use_column_width=True)img_path = f"page_{i+1}.png"img.save(img_path)with open(img_path, "rb") as f:st.download_button(f"下载 Page {i+1}", f, file_name=img_path)

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✅ 功能扩展建议

• ✅ PDF 合并：用 PyPDF2 或 pypdf 实现多文件合并。
• ✅ PDF 添加水印 / 文字注释：用 reportlab + PyPDF2 实现。
• ✅ OCR 图片识别：嵌入 pytesseract 对图片页进行文本提取。

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