PyPDF2.errors.DeprecationError: reader.numPages is deprecated and was removed in PyPDF2 3.0.0. Use len(reader.pages) instead.

你可以按照提示使用 `len(reader.pages)` 替换 `reader.numPages`，以下是示例代码：

import PyPDF2

pdf_file = open('example.pdf', 'rb')
pdf_reader = PyPDF2.PdfReader(pdf_file)

# 获取PDF文件中所有页面的文本内容
text = ''
for page in range(len(pdf_reader.pages)):
    page_obj = pdf_reader.pages[page]
    text += page_obj.text

print(text)

pdf_file.close()

需要注意的是，`PdfReader` 相对于 `PdfFileReader` 有一些不同之处，例如获取页面对象的方法等。具体可以参考 PyPDF2 官方文档。

相关问题

PyPDF2.errors.DeprecationError: reader.getNumPages is deprecated and was removed in PyPDF2 3.0.0. Use len(reader.pages) instead.

这是因为 PyPDF2 在 3.0.0 版本中已经移除了 `getNumPages` 方法，取而代之的是使用 `len(reader.pages)` 来获取 PDF 文件中的总页数。你需要升级 PyPDF2 到最新版本，并使用 `len(reader.pages)` 来获取总页数。例如：

import PyPDF2

with open('example.pdf', 'rb') as pdf_file:
    reader = PyPDF2.PdfFileReader(pdf_file)
    num_pages = len(reader.pages)
    print(num_pages)

PyPDF2.errors.DeprecationError: PdfFileWriter is deprecated and was removed in PyPDF2 3.0.0. Use PdfWriter instead.

This error message indicates that the PdfFileWriter class in PyPDF2 is no longer supported and has been removed in version 3.0.0. Instead, you should use the PdfWriter class.

To fix this error, you need to update your code to use the new PdfWriter class. Here is an example of how to create a PDF file using the PdfWriter class:

from PyPDF2 import PdfFileReader, PdfWriter

# create a new PdfWriter object
writer = PdfWriter()

# add a new page to the PDF
page = writer.add_blank_page(width=612, height=792)

# write some text on the page
page.add_text("Hello, World!")

# save the PDF to a file
with open("output.pdf", "wb") as out:
    writer.write(out)

Note that you may need to modify your existing code to use the new PdfWriter class, depending on what you are trying to do.