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python-upgrade-removed-api-lint
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Python 3.12 Removed modules — check your python code free</title>
<meta name="description" content="Find imports and calls removed from the Python standard library in versions 3.12, 3.13, and 3.14.">
<style>
:root{color-scheme:light}body{margin:0;font:15px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif;background:#faf9f5;color:#1a1512}
.wrap{max-width:960px;margin:0 auto;padding:28px 18px 60px}h1{font-size:26px;margin:0 0 6px}.lede{color:#4a403a;margin:0 0 16px}
textarea{width:100%;min-height:260px;font:13px/1.45 ui-monospace,Menlo,Consolas,monospace;padding:12px;border:1px solid #d9d0c4;border-radius:8px;box-sizing:border-box}
.bar{display:flex;gap:10px;align-items:center;margin:12px 0}button{font:600 15px system-ui;padding:10px 18px;border:0;border-radius:8px;background:#1a1512;color:#fff;cursor:pointer}
select,input[type=date]{font:14px system-ui;padding:8px;border:1px solid #d9d0c4;border-radius:6px}
table{border-collapse:collapse;width:100%;font-size:14px;margin-top:10px}th,td{text-align:left;padding:8px 10px;border-bottom:1px solid #eee;vertical-align:top}th{font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:#7a6e65}
.sev.error{color:#a8551f;font-weight:700}.sev.warn,.sev.warning{color:#96691f}.ok{color:#2a6446;font-weight:600}.sum{font-weight:600}
.note{font-size:13px;color:#7a6e65;margin-top:18px}#paid{margin-top:22px;padding:14px 16px;border:1px solid #e2d8cb;border-radius:10px;background:#fffdfa}
</style>
<script data-grow-initializer="">!(function(){window.growMe||((window.growMe=function(e){window.growMe._.push(e);}),(window.growMe._=[]));var e=document.createElement("script");(e.type="text/javascript"),(e.src="https://faves.grow.me/main.js"),(e.defer=!0),e.setAttribute("data-grow-faves-site-id","U2l0ZTphZjljMzgyMC0yMmU5LTRhYjgtYTIxNS03OTRhMGY1N2ExYzM=");var t=document.getElementsByTagName("script")[0];t.parentNode.insertBefore(e,t);})();</script>
<!--yj-canon-s101--><link rel="canonical" href="https://getreadystack.com/tools/python-upgrade-removed-api-lint"><style data-yj-mfit="1">#out{max-width:100%}#out td,#out th{overflow-wrap:break-word}#out th{white-space:nowrap}#out pre{white-space:pre-wrap;overflow-wrap:anywhere}#out code{white-space:pre-wrap;overflow-wrap:break-word}@media (max-width:640px){#out td,#out th{overflow-wrap:anywhere}#out th{white-space:normal}table{display:block;max-width:100%;overflow-x:auto}pre{max-width:100%;overflow-x:auto}code,a{overflow-wrap:anywhere}img,svg,video,canvas,iframe{max-width:100%}textarea,input,select{max-width:100%;box-sizing:border-box}.yj-lgbar{position:static!important;justify-content:flex-end;margin:0 0 10px}h1,h2,h3,h4,p,li,dd,dt,blockquote,figcaption,summary,label,.res,.lead{overflow-wrap:anywhere}label{max-width:100%;box-sizing:border-box}#out table:not(:has(tr>:nth-child(4))){display:table;table-layout:fixed;width:100%}#out table:has(tr>:nth-child(4)),#out table:has(tr>:nth-child(4)) tbody,#out table:has(tr>:nth-child(4)) tr,#out table:has(tr>:nth-child(4)) td{display:block;width:auto;overflow:visible}#out table:has(tr>:nth-child(4)) thead{display:none}#out table:has(tr>:nth-child(4)) tr{padding:10px 0;border-bottom:1px solid rgba(128,128,128,.28)}#out table:has(tr>:nth-child(4)) td{border:0;padding:1px 0}#out table:has(tr>:nth-child(4)) td:nth-child(-n+3){display:inline-block;margin-right:10px;font-size:12px;opacity:.78}}</style>
</head>
<body>
<div class="wrap">
<h1>Python 3.12 Removed modules — check your python code free</h1>
<p class="lede">Flags imports and calls removed from the Python standard library in 3.12, 3.13 and 3.14 (cgi, imp, distutils, telnetlib, unittest aliases, ast.Str) before you leave Python 3.10. Runs entirely in your browser — nothing is uploaded.</p>
<textarea id="src" spellcheck="false"># Nightly export job, written in 2021 for Python 3.10.
import cgi
import imp
import os, pipes
import telnetlib
import imghdr
import sqlite3
from distutils.core import setup
from configparser import SafeConfigParser
from datetime import datetime
import ssl
import ast
import unittest


def load_plugin(path):
    return imp.load_source("plugin", path)


def read_config(fp):
    cfg = SafeConfigParser()
    cfg.readfp(fp)
    return cfg


def run(cmd):
    return os.system(pipes.quote(cmd))


def stamp():
    print("sqlite", sqlite3.version)
    return datetime.utcnow().isoformat()


def secure(sock):
    return ssl.wrap_socket(sock)


def is_str(node):
    return isinstance(node, ast.Str)


class T(unittest.TestCase):
    def test_form(self):
        form = cgi.FieldStorage()
        self.assertEquals(form.getvalue("a"), "1")</textarea>
<div class="bar"><button id="go">Check</button><label>Upgrade target <select id="target"><option value="3.12">Python 3.12</option><option value="3.13">Python 3.13</option><option value="3.14" selected>Python 3.14</option></select></label><input type="hidden" id="today"></div>
<div id="out" aria-live="polite"></div>
<div id="paid"><strong>Free here:</strong> check one .py file against all 43 removed-stdlib rules for Python 3.12, 3.13 and 3.14 and see the line, the version that removed it, and the replacement. <strong>Full version ($29 once · one licence key per person or team seat):</strong> scan the whole workspace in one pass and export a Markdown upgrade report per target version for the migration ticket. <a href="https://getreadystack.com/api/buy/cl/polar_cl_2Izy69ZyqcJdKkYcQRlrKODleXMjHPRFCgWjE3eTaR6">Get the full version — $29</a></div>
<p class="note">Same engine as the VS Code extension, byte for byte.</p>
</div>
<script>var PYUP_RULES = [
 {
  "id": "distutils",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+distutils(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*distutils(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "distutils was removed from the standard library.",
  "fix": "use setuptools (setuptools._distutils) or packaging / sysconfig / shutil.",
  "source": "PEP 632"
 },
 {
  "id": "imp",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+imp(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*imp(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The imp module was removed.",
  "fix": "use importlib (importlib.util.spec_from_file_location, importlib.reload).",
  "source": "What's New 3.12"
 },
 {
  "id": "asyncore",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+asyncore(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*asyncore(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "asyncore was removed.",
  "fix": "use asyncio.",
  "source": "PEP 594"
 },
 {
  "id": "asynchat",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+asynchat(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*asynchat(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "asynchat was removed.",
  "fix": "use asyncio streams.",
  "source": "PEP 594"
 },
 {
  "id": "smtpd",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+smtpd(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*smtpd(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "smtpd was removed.",
  "fix": "use the aiosmtpd package from PyPI.",
  "source": "PEP 594"
 },
 {
  "id": "unittest-alias",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "\\.(?:assertEquals|assertNotEquals|assertAlmostEquals|assertNotAlmostEquals|assertRegexpMatches|assertNotRegexpMatches|assertRaisesRegexp|failUnlessEqual|failIfEqual|failUnlessRaises|failUnlessAlmostEqual|failIfAlmostEqual|failUnless|failIf|assert_|assertDictContainsSubset)\\s*\\("
  ],
  "msg": "A deprecated unittest.TestCase alias was removed.",
  "fix": "use assertEqual, assertNotEqual, assertAlmostEqual, assertRegex, assertRaisesRegex, assertTrue, assertFalse.",
  "source": "What's New 3.12"
 },
 {
  "id": "safeconfigparser",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "\\bSafeConfigParser\\b"
  ],
  "msg": "configparser.SafeConfigParser was removed.",
  "fix": "use configparser.ConfigParser.",
  "source": "What's New 3.12"
 },
 {
  "id": "readfp",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "\\.readfp\\s*\\("
  ],
  "msg": "ConfigParser.readfp() was removed.",
  "fix": "use read_file().",
  "source": "What's New 3.12"
 },
 {
  "id": "ssl-wrap-socket",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "\\bssl\\.wrap_socket\\s*\\(",
   "^\\s*from\\s+ssl\\s+import\\b.*\\bwrap_socket\\b"
  ],
  "msg": "ssl.wrap_socket() was removed.",
  "fix": "create an ssl.SSLContext and call context.wrap_socket().",
  "source": "What's New 3.12"
 },
 {
  "id": "ssl-match-hostname",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "\\bssl\\.match_hostname\\b",
   "^\\s*from\\s+ssl\\s+import\\b.*\\bmatch_hostname\\b"
  ],
  "msg": "ssl.match_hostname() was removed.",
  "fix": "let SSLContext.check_hostname verify the host.",
  "source": "What's New 3.12"
 },
 {
  "id": "locale-format",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "\\blocale\\.format\\s*\\("
  ],
  "msg": "locale.format() was removed.",
  "fix": "use locale.format_string().",
  "source": "What's New 3.12"
 },
 {
  "id": "pkgutil-imp",
  "removed_in": "3.12",
  "sev": "error",
  "patterns": [
   "\\bImpImporter\\b",
   "\\bImpLoader\\b"
  ],
  "msg": "pkgutil.ImpImporter / ImpLoader were removed.",
  "fix": "use importlib.machinery finders and loaders.",
  "source": "What's New 3.12"
 },
 {
  "id": "utcnow",
  "removed_in": "3.12",
  "sev": "warn",
  "patterns": [
   "\\bdatetime\\.utcnow\\s*\\(",
   "\\bdatetime\\.utcfromtimestamp\\s*\\(",
   "^\\s*.*\\butcnow\\s*\\(\\s*\\)"
  ],
  "msg": "datetime.utcnow() / utcfromtimestamp() return naive datetimes and are deprecated, not yet removed.",
  "fix": "use datetime.now(timezone.utc) / datetime.fromtimestamp(ts, timezone.utc).",
  "source": "What's New 3.12"
 },
 {
  "id": "aifc",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+aifc(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*aifc(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The aifc module was removed (dead battery).",
  "fix": "use a PyPI audio library such as soundfile.",
  "source": "PEP 594"
 },
 {
  "id": "audioop",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+audioop(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*audioop(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The audioop module was removed (dead battery).",
  "fix": "use numpy or the audioop-lts package.",
  "source": "PEP 594"
 },
 {
  "id": "cgi",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+cgi(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*cgi(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The cgi module was removed (dead battery).",
  "fix": "parse forms with urllib.parse.parse_qsl or email.message; use multipart for uploads.",
  "source": "PEP 594"
 },
 {
  "id": "cgitb",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+cgitb(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*cgitb(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The cgitb module was removed (dead battery).",
  "fix": "use the traceback module or your framework's error pages.",
  "source": "PEP 594"
 },
 {
  "id": "chunk",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+chunk(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*chunk(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The chunk module was removed (dead battery).",
  "fix": "read IFF chunks with struct.",
  "source": "PEP 594"
 },
 {
  "id": "crypt",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+crypt(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*crypt(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The crypt module was removed (dead battery).",
  "fix": "use hashlib, or bcrypt / argon2-cffi from PyPI.",
  "source": "PEP 594"
 },
 {
  "id": "imghdr",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+imghdr(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*imghdr(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The imghdr module was removed (dead battery).",
  "fix": "use the filetype or Pillow package.",
  "source": "PEP 594"
 },
 {
  "id": "mailcap",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+mailcap(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*mailcap(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The mailcap module was removed (dead battery).",
  "fix": "use mimetypes.",
  "source": "PEP 594"
 },
 {
  "id": "msilib",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+msilib(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*msilib(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The msilib module was removed (dead battery).",
  "fix": "use a PyPI MSI tool.",
  "source": "PEP 594"
 },
 {
  "id": "nis",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+nis(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*nis(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The nis module was removed (dead battery).",
  "fix": "use a PyPI replacement.",
  "source": "PEP 594"
 },
 {
  "id": "nntplib",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+nntplib(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*nntplib(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The nntplib module was removed (dead battery).",
  "fix": "use the pynntp package from PyPI.",
  "source": "PEP 594"
 },
 {
  "id": "ossaudiodev",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+ossaudiodev(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*ossaudiodev(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The ossaudiodev module was removed (dead battery).",
  "fix": "use a PyPI audio library.",
  "source": "PEP 594"
 },
 {
  "id": "pipes",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+pipes(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*pipes(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The pipes module was removed (dead battery).",
  "fix": "use subprocess and shlex.quote().",
  "source": "PEP 594"
 },
 {
  "id": "sndhdr",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+sndhdr(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*sndhdr(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The sndhdr module was removed (dead battery).",
  "fix": "use the filetype package.",
  "source": "PEP 594"
 },
 {
  "id": "spwd",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+spwd(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*spwd(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The spwd module was removed (dead battery).",
  "fix": "use the python-pam package.",
  "source": "PEP 594"
 },
 {
  "id": "sunau",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+sunau(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*sunau(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The sunau module was removed (dead battery).",
  "fix": "use a PyPI audio library.",
  "source": "PEP 594"
 },
 {
  "id": "telnetlib",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+telnetlib(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*telnetlib(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The telnetlib module was removed (dead battery).",
  "fix": "use telnetlib3 or Exscript from PyPI, or SSH (paramiko).",
  "source": "PEP 594"
 },
 {
  "id": "uu",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+uu(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*uu(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The uu module was removed (dead battery).",
  "fix": "use base64.",
  "source": "PEP 594"
 },
 {
  "id": "xdrlib",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+xdrlib(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*xdrlib(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "The xdrlib module was removed (dead battery).",
  "fix": "use struct.",
  "source": "PEP 594"
 },
 {
  "id": "lib2to3",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+lib2to3(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*lib2to3(?:\\.[\\w.]+)?(?=\\s|,|$))"
  ],
  "msg": "lib2to3 and the 2to3 tool were removed.",
  "fix": "use a maintained parser such as libcst or parso.",
  "source": "What's New 3.13"
 },
 {
  "id": "tkinter-tix",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "^\\s*(?:from\\s+tkinter\\.tix(?:\\.[\\w.]+)?\\s+import\\b|import\\s+(?:[\\w.]+(?:\\s+as\\s+\\w+)?\\s*,\\s*)*tkinter\\.tix(?:\\.[\\w.]+)?(?=\\s|,|$))",
   "^\\s*from\\s+tkinter\\s+import\\b.*\\btix\\b"
  ],
  "msg": "tkinter.tix was removed.",
  "fix": "use tkinter.ttk.",
  "source": "What's New 3.13"
 },
 {
  "id": "locale-resetlocale",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "\\blocale\\.resetlocale\\s*\\("
  ],
  "msg": "locale.resetlocale() was removed.",
  "fix": "use locale.setlocale(locale.LC_ALL, '').",
  "source": "What's New 3.13"
 },
 {
  "id": "typing-io-re",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "\\btyping\\.(?:io|re)\\b"
  ],
  "msg": "The typing.io and typing.re namespaces were removed.",
  "fix": "import IO, TextIO, BinaryIO, Pattern, Match directly from typing.",
  "source": "What's New 3.13"
 },
 {
  "id": "unittest-makesuite",
  "removed_in": "3.13",
  "sev": "error",
  "patterns": [
   "\\bunittest\\.(?:makeSuite|findTestCases|getTestCaseNames)\\b"
  ],
  "msg": "unittest.makeSuite / findTestCases / getTestCaseNames were removed.",
  "fix": "use unittest.TestLoader methods (loadTestsFromTestCase, loadTestsFromModule, getTestCaseNames).",
  "source": "What's New 3.13"
 },
 {
  "id": "ast-constants",
  "removed_in": "3.14",
  "sev": "error",
  "patterns": [
   "\\bast\\.(?:Num|Str|Bytes|NameConstant|Ellipsis)\\b"
  ],
  "msg": "ast.Num / Str / Bytes / NameConstant / Ellipsis were removed.",
  "fix": "use ast.Constant and check type(node.value).",
  "source": "What's New 3.14"
 },
 {
  "id": "pkgutil-loader",
  "removed_in": "3.14",
  "sev": "error",
  "patterns": [
   "\\bpkgutil\\.(?:find_loader|get_loader)\\b"
  ],
  "msg": "pkgutil.find_loader() / get_loader() were removed.",
  "fix": "use importlib.util.find_spec().",
  "source": "What's New 3.14"
 },
 {
  "id": "asyncio-child-watcher",
  "removed_in": "3.14",
  "sev": "error",
  "patterns": [
   "\\b(?:get_child_watcher|set_child_watcher|AbstractChildWatcher|SafeChildWatcher|FastChildWatcher|ThreadedChildWatcher|PidfdChildWatcher|MultiLoopChildWatcher)\\b"
  ],
  "msg": "asyncio child watcher classes and functions were removed.",
  "fix": "delete the watcher setup; asyncio subprocesses work without it.",
  "source": "What's New 3.14"
 },
 {
  "id": "urlopener",
  "removed_in": "3.14",
  "sev": "error",
  "patterns": [
   "\\b(?:FancyURLopener|URLopener)\\b"
  ],
  "msg": "urllib.request.URLopener / FancyURLopener were removed.",
  "fix": "use urllib.request.urlopen() or build_opener().",
  "source": "What's New 3.14"
 },
 {
  "id": "importlib-abc-resources",
  "removed_in": "3.14",
  "sev": "error",
  "patterns": [
   "\\bimportlib\\.abc\\.(?:ResourceReader|Traversable|TraversableResources)\\b",
   "^\\s*from\\s+importlib\\.abc\\s+import\\b.*\\b(?:ResourceReader|Traversable|TraversableResources)\\b"
  ],
  "msg": "importlib.abc ResourceReader / Traversable / TraversableResources were removed.",
  "fix": "import them from importlib.resources.abc.",
  "source": "What's New 3.14"
 },
 {
  "id": "sqlite3-version",
  "removed_in": "3.14",
  "sev": "error",
  "patterns": [
   "\\bsqlite3\\.version(?:_info)?\\b"
  ],
  "msg": "sqlite3.version / version_info (the module version) were removed.",
  "fix": "use sqlite3.sqlite_version for the SQLite library version.",
  "source": "What's New 3.14"
 }
];</script>
<script>// Python upgrade lint: stdlib modules and APIs removed in Python 3.12, 3.13 and 3.14.
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      var code = codeOnly(raw);
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        var c = COMPILED[k], r = c.r;
        if (ver(r.removed_in) > tv) continue;
        for (var j = 0; j < c.res.length; j++) {
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    var errors = findings.filter(function (f) { return f.sev === 'error'; }).length;
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  var api = { engine: { check: check }, RULES: RULES, RULE_COUNT: RULES.length, TARGETS: TARGETS };
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<script>// ⛔뼈대 — kit/scaffold.py 가 찍는다 (s143). findings [{check,sev,msg,line?}] → 글/HTML. 같은 파일이 Node 와 브라우저에서 산다.
'use strict';
function escapeHtml(s) { return String(s == null ? '' : s).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;'); }
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}
function toHtml(res) {
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  if (!f.length) return '<p class="ok">' + escapeHtml(summaryLine(res)) + '</p>';
  const rows = f.map(function (x) { return '<tr><td class="sev ' + escapeHtml(String(x.sev || 'error')) + '">' + escapeHtml(String(x.sev || 'error')) + '</td><td>' + (x.line ? 'L' + escapeHtml(x.line) : '') + '</td><td><code>' + escapeHtml(x.check || x.id || '') + '</code></td><td>' + escapeHtml(x.msg || x.message || '') + '</td></tr>'; }).join('');
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}
var PYUPREPORT = { escapeHtml: escapeHtml, summaryLine: summaryLine, toText: toText, toHtml: toHtml };
if (typeof module !== 'undefined' && module.exports) module.exports = PYUPREPORT;
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<script>
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<section data-yj-install="free" style="margin:2rem auto 1rem;max-width:46rem;padding:1.25rem 1.25rem;border:1px solid #cfe3d6;border-radius:12px;background:#f6fbf8;font:16px/1.6 system-ui,-apple-system,Segoe UI,sans-serif"><h2 style="margin:0 0 .4rem;font-size:1.2rem">Install free</h2><p style="margin:0 0 .8rem;color:#41505f">Free for the file open in your editor - no key, no limit. The workspace sweep and the report ask for a key.</p><a href="https://marketplace.visualstudio.com/items?itemName=ReadyStack.python-upgrade-removed-api-lint" rel="noopener" data-yj-install-door="mp" onclick="try{navigator.sendBeacon('/api/ev',new Blob([JSON.stringify({t:'install',slug:'python-upgrade-removed-api-lint',src:'mp',path:location.pathname})],{type:'application/json'}))}catch(e){}" style="display:inline-block;margin:0 .5rem .5rem 0;padding:.6rem 1rem;border-radius:8px;background:#0f7b3f;color:#fff;text-decoration:none;font-weight:600">VS Code Marketplace</a><pre style="margin:.5rem 0 0;padding:.6rem .8rem;background:#f3f5f8;border-radius:8px;font-size:.9rem;overflow:auto">ext install ReadyStack.python-upgrade-removed-api-lint</pre><p style="margin:.6rem 0 0;font-size:.92rem;color:#41505f"><a href="https://getreadystack.com/api/buy/team" rel="nofollow" style="color:#0f7b3f;text-decoration:underline">Team? One key for every ReadyStack linter, 5 seats, $149 once</a></p></section>
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This is for Python developers and platform teams in the US, the UK and Europe who have to move services off Python 3.10 before it reaches end of life in October 2026.</p>
<h3>The date that forces the upgrade</h3>
<p>Python 3.10 gets security fixes until October 2026. After that, a CVE in the interpreter or the standard library stays unpatched on 3.10, and security scanners and base images start to flag it. Most teams jump to 3.12, 3.13 or 3.14. Each of those versions removed part of the standard library, and code written for 3.10 often still uses those parts.</p>
<p>The failure is not subtle. <code>import cgi</code> works on 3.12 and raises <code>ModuleNotFoundError</code> on 3.13. <code>import imp</code> already fails on 3.12. <code>self.assertEquals(...)</code> in a test file becomes an <code>AttributeError</code> on 3.12. <code>isinstance(node, ast.Str)</code> stops working on 3.14.</p>
<h3>What we measured</h3>
<p>We wrote a small nightly job the way many 3.10 codebases look: it loads plugins with <code>imp</code>, parses a form with <code>cgi</code>, quotes shell commands with <code>pipes</code>, talks to a device with <code>telnetlib</code>, reads config with <code>SafeConfigParser</code> and <code>readfp()</code>, wraps a socket with <code>ssl.wrap_socket()</code> and walks an AST with <code>ast.Str</code>.</p>
<p>Then we ran the checker with each target version:</p>
<ul><li>target 3.12: 8 findings (7 removed, 1 deprecated)</li><li>target 3.13: 12 findings (11 removed, 1 deprecated)</li><li>target 3.14: 14 findings (13 removed, 1 deprecated)</li></ul>
<p>The deprecated one is <code>datetime.utcnow()</code>. It still runs, but it returns a naive datetime and is on its way out. The cleaned-up version of the same file, rewritten with <code>importlib</code>, <code>shlex.quote</code>, <code>ConfigParser.read_file</code>, <code>SSLContext.wrap_socket</code> and <code>ast.Constant</code>, gives 0 findings.</p>
<h3>Why the interpreter alone is slow</h3>
<p>You can install 3.13 and run the code. It stops at the first <code>ModuleNotFoundError</code>, you fix that one, and you run it again. Removed methods only fail when that code path runs, so a rarely used branch can ship broken. A chatbot answer is no better: it lists removed modules from memory, it does not read your file, and it often gets the version wrong (<code>imp</code> went in 3.12, <code>cgi</code> in 3.13, <code>ast.Str</code> in 3.14).</p>
<p>AI coding assistants learned from years of older Python. Code they write today can still contain these imports, so reviewing AI-written Python for them is part of the same job.</p>
<h3>How the check works</h3>
<p>The rule table has 43 rules: 13 for 3.12 (including <code>distutils</code> from PEP 632, <code>imp</code>, <code>asyncore</code>, <code>smtpd</code> and the old unittest aliases), 24 for 3.13 (the 19 PEP 594 dead-battery modules plus <code>lib2to3</code>, <code>tkinter.tix</code>, <code>typing.io</code> and others), and 6 for 3.14 (<code>ast.Num</code>/<code>ast.Str</code>, <code>pkgutil.find_loader</code>, asyncio child watchers, <code>URLopener</code>, <code>importlib.abc</code> resource classes, <code>sqlite3.version</code>). Strings, docstrings and comments are skipped. Each finding names the line, the version, the source and the replacement.</p>
<h3>Try it on your file</h3>
<p>The web page and the VS Code extension use the same engine. Paste one .py file, pick 3.12, 3.13 or 3.14, and read the list. That part is free and complete for one file. When you need the whole repository swept in one pass and a written report for the migration ticket, that part takes a licence key.</p>
<p>For scale: by hand, this is a developer grepping for dozens of names and checking three What&#x27;s New pages. The US median software developer wage is $63.98 an hour (BLS, May 2024).</p></div><h2 style="font:600 21px/1.3 system-ui,sans-serif;margin:34px 0 6px;color:#1b1f24">Questions people ask</h2><details style="border-bottom:1px solid #e6e9ed;padding:10px 0"><summary style="cursor:pointer;font:600 15px/1.4 system-ui,sans-serif;color:#1b1f24">What does Python Upgrade Lint do?</summary><p style="margin:8px 0 2px;font:400 14.5px/1.6 system-ui,sans-serif;color:#33404b">It reads a Python .py file and marks every line that uses a standard-library module or API removed in Python 3.12, 3.13 or 3.14, such as cgi, imp, distutils, telnetlib, the old unittest aliases or ast.Str. It checks 43 rules. For each finding it shows the line number, the version that removed it, the PEP or What&#x27;s New source, and the replacement to use.</p></details><details style="border-bottom:1px solid #e6e9ed;padding:10px 0"><summary style="cursor:pointer;font:600 15px/1.4 system-ui,sans-serif;color:#1b1f24">Who is Python Upgrade Lint for?</summary><p style="margin:8px 0 2px;font:400 14.5px/1.6 system-ui,sans-serif;color:#33404b">Python developers and platform teams moving services off Python 3.10 before its October 2026 end of life, and anyone upgrading a Django, Flask, script or data-pipeline codebase to Python 3.12, 3.13 or 3.14. It also suits reviewers of AI-written Python, because assistants trained on older code can still produce imports such as cgi, imp or distutils.</p></details><details style="border-bottom:1px solid #e6e9ed;padding:10px 0"><summary style="cursor:pointer;font:600 15px/1.4 system-ui,sans-serif;color:#1b1f24">Why not ask a chatbot or rely on a free tool?</summary><p style="margin:8px 0 2px;font:400 14.5px/1.6 system-ui,sans-serif;color:#33404b">A chatbot lists removed modules from memory. It does not read your file line by line, and it often mixes up the version: imp was removed in 3.12, cgi in 3.13 and ast.Str in 3.14. Running the new interpreter only shows the first ModuleNotFoundError, one at a time. This checker applies one fixed table of 43 rules and reports every hit at once.</p></details><details style="border-bottom:1px solid #e6e9ed;padding:10px 0"><summary style="cursor:pointer;font:600 15px/1.4 system-ui,sans-serif;color:#1b1f24">What is free and what needs a licence key?</summary><p style="margin:8px 0 2px;font:400 14.5px/1.6 system-ui,sans-serif;color:#33404b">Free, with no key: check one open .py file against all 43 rules, in VS Code or pasted into the web page, and pick 3.12, 3.13 or 3.14 as the target. The paid licence ($29 once, one key per person or team seat) adds a whole-workspace sweep in one pass and a Markdown upgrade report for each target version to attach to the migration ticket.</p></details><details style="border-bottom:1px solid #e6e9ed;padding:10px 0"><summary style="cursor:pointer;font:600 15px/1.4 system-ui,sans-serif;color:#1b1f24">What does it cost to find these lines by hand?</summary><p style="margin:8px 0 2px;font:400 14.5px/1.6 system-ui,sans-serif;color:#33404b">By hand, a developer greps for each removed module and API, cross-checks the Python What&#x27;s New pages for 3.12, 3.13 and 3.14, and then fixes the hits. The US median software developer wage is $63.98 an hour (BLS, May 2024), so every hour of searching costs about that much. 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