[issue16372] Initialization strange behavior
New submission from Wojciech Danilo:
Hi!
I'm using Python for several years and now I'm writing in Python 3 for the
first time. I think I found a strange bug in it. Lets concider the code in the
attachement.
In the 33 line there is construction of new instance of class Result:
print('!!!',Result().value)
what is strange, the class is defined as:
class Result:
def __init__(self, value=[], start=0, end=0):
self.value = value
...
and what I get as a result is:
"!!! ['a', 'b']"
Where the array was somehow magically stored from previous initialization (take
a look at the code for full listing).
--
components: Interpreter Core
files: test.py
messages: 174280
nosy: wdanilo
priority: normal
severity: normal
status: open
title: Initialization strange behavior
versions: Python 3.3
Added file: http://bugs.python.org/file27809/test.py
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[issue16372] Initialization strange behavior
Wojciech Danilo added the comment: Wow, I was using Python so long and I didn't know about it. Is there any paper discussing why this feature is better than storing "cache" as global variable / as class "private" parameter? -- ___ Python tracker <http://bugs.python.org/issue16372> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16372] Initialization strange behavior
Wojciech Danilo added the comment: Thank you! -- ___ Python tracker <http://bugs.python.org/issue16372> ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue16851] ismethod and isfunction methods error
New submission from Wojciech Danilo:
Hi! I think this behaviour is bug. Lets concider the following code:
import inspect
class X(object):
def a(self):pass
def b(self):pass
def c(self):pass
print(inspect.getmembers(X, predicate=inspect.ismethod))
print(inspect.getmembers(X, predicate=inspect.isfunction))
In python 2.7, the results are:
[('a', ), ('b', ), ('c', )]
[]
and in Python 3.2:
[]
[('a', ), ('b', ), ('c',
)]
I think, the results from python 2.7 are correct.
--
components: Library (Lib)
messages: 178964
nosy: wdanilo
priority: normal
severity: normal
status: open
title: ismethod and isfunction methods error
type: behavior
versions: Python 2.7, Python 3.2
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