PDFPython：使用Python处理PDF文件的全面指南

PDFPython是一个强大的Python库，它允许开发者在Python环境中创建、修改和提取PDF文件的内容，这个库提供了一系列的功能，包括创建新的PDF文件、合并多个PDF文件、分割PDF文件、添加和删除页面、旋转页面、加密和解密PDF文件等，本文将详细介绍如何使用PDFPython库进行这些操作。

我们需要安装PDFPython库，可以使用pip命令进行安装：

pip install pdfminer.six

安装完成后，我们可以开始使用PDFPython库了。

1、创建新的PDF文件：

PDFPython库提供了一个名为pdfdocument的类，我们可以通过这个类创建新的PDF文件，以下是一个简单的例子：

from pdfminer.high_level import extract_text
from pdfminer.layout import LAParams
from pdfminer.pdfinterp import PDFResourceManager, PDFPageInterpreter
from pdfminer.converter import TextConverter
from pdfminer.pdfpage import PDFPage
from io import StringIO

def convert_pdf_to_txt(path):
    rsrcmgr = PDFResourceManager()
    retstr = StringIO()
    codec = 'utf-8'
    laparams = LAParams()
    device = TextConverter(rsrcmgr=rsrcmgr, outfp=retstr, codec=codec, laparams=laparams)
    interpreter = PDFPageInterpreter(rsrcmgr=rsrcmgr, device=device)
    maxpages = 0
    caching = True
    pagenos=set()

    with open(path, 'rb') as fh:
        for page in PDFPage.get_pages(fh, pagenos, maxpages=maxpages, caching=caching, check_extractable=True):
            interpreter.process_page(page)
        text = retstr.getvalue()

    # close open handles used by the StringIO instance and TextConverter (if they were opened)
    retstr.close()
    device.close()
    return text

2、合并多个PDF文件：

PDFPython库提供了一个名为PdfFileMerger的类，我们可以通过这个类合并多个PDF文件，以下是一个简单的例子：

from PyPDF2 import PdfFileMerger

def merge_pdfs(paths, output):
    merger = PdfFileMerger()
    for path in paths:
        merger.append(path)
    merger.write(output)
    merger.close()

3、分割PDF文件：

PDFPython库提供了一个名为PdfFileReader的类，我们可以通过这个类分割PDF文件，以下是一个简单的例子：

from PyPDF2 import PdfFileReader, PdfFileWriter

def split_pdf(input_pdf, output):
    pdf = PdfFileReader(input_pdf)
    for i in range(0, pdf.getNumPages()):
        writer = PdfFileWriter()
        writer.addPage(pdf.getPage(i))
        with open('{}.pdf'.format(i), 'wb') as output:
            writer.write(output)

4、添加和删除页面：

PDFPython库提供了一个名为PdfFileReader的类，我们可以通过这个类添加和删除PDF文件的页面，以下是一个简单的例子：

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