From 53b8db359378f436bfd88f90a90aaf01b650d3a6 Mon Sep 17 00:00:00 2001
From: Inada Naoki <songofacandy@gmail.com>
Date: Tue, 18 Jun 2019 16:15:25 +0900
Subject: [PATCH] Stop using deprecated HTMLParser.unescape

HTMLParser.unescape is accessed even when unused - this will cause an
exception when `HTMLParser.unescape` is removed in Python 3.9.
---
 setuptools/py33compat.py    | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 changelog.d/1788.change.rst

diff --git a/setuptools/py33compat.py b/setuptools/py33compat.py
index 87cf53983..cb6944363 100644
--- a/setuptools/py33compat.py
+++ b/setuptools/py33compat.py
@@ -52,4 +52,8 @@ def __iter__(self):
 Bytecode = getattr(dis, 'Bytecode', Bytecode_compat)
 
 
-unescape = getattr(html, 'unescape', html_parser.HTMLParser().unescape)
+unescape = getattr(html, 'unescape', None)
+if unescape is None:
+    # HTMLParser.unescape is deprecated since Python 3.4, and will be removed
+    # from 3.9.
+    unescape = html_parser.HTMLParser().unescape