https://github.com/python/cpython/commit/f297dabbe05fb240f5eaf0831420a8408ddec5e4
commit: f297dabbe05fb240f5eaf0831420a8408ddec5e4
branch: 3.13
author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com>
committer: picnixz <10796600+picn...@users.noreply.github.com>
date: 2025-03-18T09:33:19Z
summary:
[3.13] gh-130132: properly free resources in `urrlib.urlopen` examples
(GH-130280) (#131394)
gh-130132: properly free resources in `urrlib.urlopen` examples (GH-130280)
(cherry picked from commit 77d2fd441320ca365c34e21c475d3878f3d5d833)
Co-authored-by: Kanishk Pachauri <itskanishkp...@gmail.com>
Co-authored-by: sobolevn <m...@sobolevn.me>
Co-authored-by: Bénédikt Tran <10796600+picn...@users.noreply.github.com>
files:
M Doc/library/urllib.request.rst
diff --git a/Doc/library/urllib.request.rst b/Doc/library/urllib.request.rst
index 46e0f6275aee53..32127e3380580f 100644
--- a/Doc/library/urllib.request.rst
+++ b/Doc/library/urllib.request.rst
@@ -1233,7 +1233,10 @@ It is also possible to achieve the same result without
using the
>>> import urllib.request
>>> f = urllib.request.urlopen('http://www.python.org/')
- >>> print(f.read(100).decode('utf-8'))
+ >>> try:
+ ... print(f.read(100).decode('utf-8'))
+ ... finally:
+ ... f.close()
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtm
@@ -1278,7 +1281,8 @@ Use of Basic HTTP Authentication::
opener = urllib.request.build_opener(auth_handler)
# ...and install it globally so it can be used with urlopen.
urllib.request.install_opener(opener)
- urllib.request.urlopen('http://www.example.com/login.html')
+ with urllib.request.urlopen('http://www.example.com/login.html') as f:
+ print(f.read().decode('utf-8'))
:func:`build_opener` provides many handlers by default, including a
:class:`ProxyHandler`. By default, :class:`ProxyHandler` uses the environment
@@ -1296,7 +1300,8 @@ programmatically supplied proxy URLs, and adds proxy
authorization support with
opener = urllib.request.build_opener(proxy_handler, proxy_auth_handler)
# This time, rather than install the OpenerDirector, we use it directly:
- opener.open('http://www.example.com/login.html')
+ with opener.open('http://www.example.com/login.html') as f:
+ print(f.read().decode('utf-8'))
Adding HTTP headers:
@@ -1307,7 +1312,9 @@ Use the *headers* argument to the :class:`Request`
constructor, or::
req.add_header('Referer', 'http://www.python.org/')
# Customize the default User-Agent header value:
req.add_header('User-Agent', 'urllib-example/0.1 (Contact: . . .)')
- r = urllib.request.urlopen(req)
+ with urllib.request.urlopen(req) as f:
+ print(f.read().decode('utf-8'))
+
:class:`OpenerDirector` automatically adds a :mailheader:`User-Agent` header to
every :class:`Request`. To change this::
@@ -1315,7 +1322,8 @@ every :class:`Request`. To change this::
import urllib.request
opener = urllib.request.build_opener()
opener.addheaders = [('User-agent', 'Mozilla/5.0')]
- opener.open('http://www.example.com/')
+ with opener.open('http://www.example.com/') as f:
+ print(f.read().decode('utf-8'))
Also, remember that a few standard headers (:mailheader:`Content-Length`,
:mailheader:`Content-Type` and :mailheader:`Host`)
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