[Python-checkins] cpython (2.7): Issue #25590: Make rlcompleter only call getattr() once per attribute
martin.panter
python-checkins at python.org
Fri Nov 13 19:45:11 EST 2015
https://hg.python.org/cpython/rev/16d83e11675f
changeset: 99119:16d83e11675f
branch: 2.7
parent: 99101:d3d974e92e6f
user: Martin Panter <vadmium+py at gmail.com>
date: Fri Nov 13 22:47:00 2015 +0000
summary:
Issue #25590: Make rlcompleter only call getattr() once per attribute
Previously it was called another time via hasattr(), and both calls were
made once for dir(f) and again for dir(f.__class__). This includes a
backport of changing from a list to a set from revision 4dbb315fe667.
files:
Lib/rlcompleter.py | 17 ++++++++++-------
Lib/test/test_rlcompleter.py | 13 +++++++++++++
Misc/NEWS | 3 +++
3 files changed, 26 insertions(+), 7 deletions(-)
diff --git a/Lib/rlcompleter.py b/Lib/rlcompleter.py
--- a/Lib/rlcompleter.py
+++ b/Lib/rlcompleter.py
@@ -135,20 +135,23 @@
return []
# get the content of the object, except __builtins__
- words = dir(thisobject)
- if "__builtins__" in words:
- words.remove("__builtins__")
+ words = set(dir(thisobject))
+ words.discard("__builtins__")
if hasattr(thisobject, '__class__'):
- words.append('__class__')
- words.extend(get_class_members(thisobject.__class__))
+ words.add('__class__')
+ words.update(get_class_members(thisobject.__class__))
matches = []
n = len(attr)
for word in words:
- if word[:n] == attr and hasattr(thisobject, word):
- val = getattr(thisobject, word)
+ if word[:n] == attr:
+ try:
+ val = getattr(thisobject, word)
+ except Exception:
+ continue # Exclude properties that are not set
word = self._callable_postfix(val, "%s.%s" % (expr, word))
matches.append(word)
+ matches.sort()
return matches
def get_class_members(klass):
diff --git a/Lib/test/test_rlcompleter.py b/Lib/test/test_rlcompleter.py
--- a/Lib/test/test_rlcompleter.py
+++ b/Lib/test/test_rlcompleter.py
@@ -65,6 +65,19 @@
['egg.{}('.format(x) for x in dir(str)
if x.startswith('s')])
+ def test_excessive_getattr(self):
+ # Ensure getattr() is invoked no more than once per attribute
+ class Foo:
+ calls = 0
+ @property
+ def bar(self):
+ self.calls += 1
+ return None
+ f = Foo()
+ completer = rlcompleter.Completer(dict(f=f))
+ self.assertEqual(completer.complete('f.b', 0), 'f.bar')
+ self.assertEqual(f.calls, 1)
+
def test_main():
support.run_unittest(TestRlcompleter)
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -52,6 +52,9 @@
Library
-------
+- Issue #25590: In the Readline completer, only call getattr() once per
+ attribute.
+
- Issue #25530: Disable the vulnerable SSLv3 protocol by default when creating
ssl.SSLContext.
--
Repository URL: https://hg.python.org/cpython
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