from ._merger import PdfFileMerger, PdfMerger
from ._page import Transformation
from ._reader import DocumentInformation, PdfFileReader, PdfReader
from ._version import __version__
from ._writer import PdfFileWriter, PdfWriter
from .pagerange import PageRange, parse_filename_page_ranges
from .papersizes import PaperSize

__all__ = [
    "__version__",
    "PageRange",
    "PaperSize",
    "DocumentInformation",
    "parse_filename_page_ranges",
    "PdfFileMerger",  # will be removed in PyPDF2 3.0.0; use PdfMerger instead
    "PdfFileReader",  # will be removed in PyPDF2 3.0.0; use PdfReader instead
    "PdfFileWriter",  # will be removed in PyPDF2 3.0.0; use PdfWriter instead
    "PdfMerger",
    "Transformation",
    "PdfReader",
    "PdfWriter",
]

@@ -72,16 +72,28 @@
 ormation
+, PageObject
 %0Afrom ._
@@ -713,30 +713,25 @@
 %22,%0A    %22
-Transformation
+PdfReader
 %22,%0A    %22
@@ -725,36 +725,36 @@
 eader%22,%0A    %22Pdf
-Read
+Writ
 er%22,%0A    %22PdfWri
@@ -747,22 +747,45 @@
 %22,%0A    %22
-PdfWriter
+Transformation%22,%0A    %22PageObject
 %22,%0A%5D%0A

Add `PageObject` to PyPDF2/__init__.py