Pending removal in Python 3.20

• Calling the __new__() method of struct.Struct without the format argument is deprecated and will be removed in Python 3.20. Calling __init__() method on initialized Struct objects is deprecated and will be removed in Python 3.20.

  (Contributed by Sergey B Kirpichev and Serhiy Storchaka in gh-143715.)

• The __version__, version and VERSION attributes have been deprecated in these standard library modules and will be removed in Python 3.20. Use sys.version_info instead.

  • argparse

  • csv

  • ctypes

  • ctypes.macholib

  • decimal (use decimal.SPEC_VERSION instead)

  • http.server

  • imaplib

  • ipaddress

  • json

  • logging (__date__ also deprecated)

  • optparse

  • pickle

  • platform

  • re

  • socketserver

  • tabnanny

  • tarfile

  • tkinter.font

  • tkinter.ttk

  • wsgiref.simple_server

  • xml.etree.ElementTree

  • xml.sax.expatreader

  • xml.sax.handler

  • zlib

  (Contributed by Hugo van Kemenade and Stan Ulbrych in gh-76007.)

• The __author__, __credits__, __copyright__ and __date__ attributes have been deprecated in these standard library modules and will be removed in Python 3.20. Attribution is preserved in the source code and the version control history.

  • bz2

  • concurrent.futures

  • inspect

  • io

  • json

  • logging

  • optparse

  • platform

  • pydoc

  • tarfile

  • tkinter.ttk

  • tokenize

  • uuid

  (Contributed by Stan Ulbrych in gh-159240.)

• Deprecations defined by PEP 829:

  • Warnings are produced for import lines found in name.pth files.

  • name.pth files are no longer decoded in the locale encoding by default. They MUST be encoded in utf-8-sig.

  (Contributed by Barry Warsaw in gh-148641.)

• ast:

  • Creating instances of abstract AST nodes (such as ast.AST or ast.expr) is deprecated and will raise an error in Python 3.20.

• typing:

  • It is deprecated to call isinstance() and issubclass() checks on protocol classes that were not explicitly decorated with runtime_checkable() but that inherit from a runtime-checkable protocol class. This will raise a TypeError in Python 3.20.

    (Contributed by Bartosz Sławecki in gh-132604.)