Matthew Cowles added the comment:
If David is right and people have previously decided not to change wording like
this, can someone explain why? As it stands, the meaning is clear and incorrect.
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Matthew Cowles added the comment:
My thanks to David for the clarification. I don't find the logic he describes
(but does not necessarily subscribe to!) persuasive in this case. In my
opinion, "Let's be incorrect for the sake of simplicity," is not the way to
document a
Matthew Barnett added the comment:
You don't give the value of 'newlines', but the problem is probably
catastrophic backtracking, not deadlock.
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Matthew Fisher added the comment:
> I did look at the code :-)
I also looked at the code. I had to do so to understand why the example output
was not "as expected." ;)
> I don't agree about the example in the documentation, it is a clear
> demonstration about how t
Matthew Barnett added the comment:
It also raises a ValueError on Windows. For other invalid paths on Windows it
returns False.
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Matthew Barnett added the comment:
For clarity, the first is '\U00010308\U00010316' and the second is
'\U00010306\U00010300\U0001030B'.
The BMP is the Basic Multilingual Plane, which covers the codepoints in the
range U+ to U+. Some software has a problem dea
Matthew Barnett added the comment:
Not all uses of the word "master" are associated with slavery, e.g. "master
craftsman", "master copy", "master file table".
I think it's best to avoid use of master/slave where practicable, but other
u
Matthew Barnett added the comment:
I don't see a problem with this. If the zip file has 'dist/file1.py' then you
know to create a directory when unzipping. If you want to indicate that there's
an empty directory 'foo', then put 'foo/' in the
Matthew Barnett added the comment:
Unicode 11.0.0 has ๅ
(U+5345) as being numeric and having the value 30.
What's the difference between that and U+4E17?
I notice that they look at lot alike. Are they different variants, perhaps
traditional vs simpl
Change by Matthew Barnett :
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New submission from Matthew Belisle :
Copied from email to secur...@python.org:
I have been doing memory profiling on a few python web frameworks and I noticed
this issue in the cgi.FieldStorage class.
$ python example.py
Memory used: 523935744 bytes
The problem is there is no easy way to
Matthew Belisle added the comment:
Sorry, looks like I forgot to attach example.py. Attaching now.
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pull_requests: +9317
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New submission from Matthew Belisle :
The cgi.FieldStorage class added in https://github.com/python/cpython/pull/9660
has an off by one error in the logic for recursively nested objects. The
problem is that sub_max_num_fields should be initialized outside of the while
loop, not inside of it
Matthew Barnett added the comment:
@Ezio: the value of stringy_thingy is irrelevant because it never gets that
far; it fails when it tries to parse the replacement, which occurs before
attempting any matching.
I can't reproduce the difference either.
--
status: pending -&
New submission from Matthew Belisle :
vstinner pointed out that cgi.FieldStorage max_num_fields needs documentation
added to Doc/library.
https://bugs.python.org/issue34866#msg328401
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Matthew Belisle added the comment:
That makes sense Victor, I agree. Thanks for merging those PRs.
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Matthew Barnett added the comment:
I've attached a patch.
--
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Added file: http://bugs.python.org/file30377/issue7940.patch
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Matthew Barnett added the comment:
Issue #2636 resulted in the regex module, which supports variable-length
look-behinds.
I don't know how much work it would take even to put a limited fixed-length
look-behind fix for this into the re module, so I'm afraid the issue must
r
Matthew Barnett added the comment:
I had to check what re does in Python 3.3:
>>> print(len(re.match(r'\w+', 'เคนเคฟเคจเฅเคฆเฅ').group()))
1
Regex does this:
>>> print(len(regex.match(r'\w+', 'เคนเคฟเคจเฅเคฆเฅ').group()))
6
--
___
Matthew Barnett added the comment:
Like the OP, I would've expected it to handle negative indexes the way that
strings do.
In practice, I wouldn't normally provide negative indexes; I'd use some string
or regex method to determine the search limits, and then pass them to findit
Matthew Barnett added the comment:
I'm not sure what you're saying.
The re module in Python 3.3 matches only the first codepoint, treating the
second codepoint as not part of a word, whereas the regex module matches all 6
codepoints, treating them all as part of a s
Matthew Barnett added the comment:
You could've obtained it from msg76556 or msg190100:
>>> print(ascii('เคนเคฟเคจเฅเคฆเฅ'))
'\u0939\u093f\u0928\u094d\u0926\u0940'
>>> import re, regex
>>> print(ascii(re.match(r"\w+",
>>> &#x
Matthew Barnett added the comment:
UTF-16 has nothing to do with it, that's just an encoding (a pair of them
actually, UTF-16LE and UTF-16BE).
And I don't know why you thought I was using findall in msg190100 when the
examples were u
Matthew Bentley added the comment:
OK, I think I fixed this. I merged the two tests into one, called
test_source_encoding.py. It doesn't fail, and I'm not sure what else I need to
do.
Patch is attached.
This is also my first patch, so please tell me if I'm doing
Matthew Barnett added the comment:
Also in Python 3.3.2, but not Python 3.2.
I haven't tested Python 3.3.1 or Python 3.3.0.
--
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Matthew Barnett added the comment:
> with open('url_list.txt') as f:
>
> content = f.readlines()
> content = ''.join(content)
>
Why are you reading all of the lines and then joining them together like that?
Why not just do:
content = f.read()
>
Matthew Byrne added the comment:
Simply replced printout from stderr to stdout.
--
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Added file: http://bugs.python.org/file30848/issue18338.diff
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Matthew Barnett added the comment:
This is basically what the regex module does, written in Python:
def get_grapheme_cluster_break(codepoint):
"""Gets the "Grapheme Cluster Break" property of a codepoint.
The properties defined here:
Matthew Barnett added the comment:
It looks like this was fixed for issue #14212.
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Python-bug
Matthew Barnett added the comment:
There's also the fact that the match object keeps a reference to the target
string anyway:
>>> import re
>>> t = memoryview(b"a")
>>> t
>>> m = re.match(b"a", t)
>>> m.string
On that su
Matthew Barnett added the comment:
I've attached my attempt at a patch.
--
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Added file: http://bugs.python.org/file31009/issue16964.patch
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Matthew Barnett added the comment:
Re msg193703: A little before that, 'value' is INCREF'ed, and then:
wstr = PyUnicode_AsUnicodeAndSize(value, &size);
if (wstr == NULL)
return NULL;
Shouldn't 'value' be DECREF'ed before r
Matthew Barnett added the comment:
I've attached a patch for this.
--
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nosy: +mrabarnett
Added file: http://bugs.python.org/file31112/issue18614.patch
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Matthew Barnett added the comment:
Suppose you have a repeated pattern, such as "(?:...)*" or "(?:...){0,100}".
If, after matching the subpattern, the text position hasn't changed, and none
of the capture groups have changed, then there has been no progress, and the
s
Matthew Barnett added the comment:
Python's current regex engine isn't so coded. That's the reason for the
up-front check.
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Matthew Barnett added the comment:
The help says:
""">>> help(re.escape)
Help on function escape in module re:
escape(pattern)
Escape all the characters in pattern except ASCII letters, numbers and '_'.
"""
The complementar
Matthew Barnett added the comment:
I can think of a real disadvantage with the current behaviour: it messes up
Unicode graphemes.
For example:
>>> print('เคนเคฟเคจเฅเคฆเฅ')
เคนเคฟเคจเฅเคฆเฅ
>>> print(re.escape('เคนเคฟเคจเฅเคฆเฅ'))
\เคน\เคฟ\เคจ\เฅ\เคฆ\เฅ
Of course, that's only a problem i
Matthew Barnett added the comment:
It appears that in your tests Python 3.2 is faster with Unicode than
bytestrings and that unpatched Python 3.4 is a lot slower.
I get somewhat different results (Windows XP Pro, 32-bit):
C:\Python32\python.exe -m timeit -s "import re; f = re.compile(
Matthew Barnett added the comment:
@Antoine: Are you on the same OS as Serhiy?
IIRC, wasn't the performance regression that wxjmfauth complained about in
Python 3.3 apparent on Windows, but not on Linux?
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Matthew Barnett added the comment:
With the patch the results are:
C:\Python34\python.exe -m timeit -s "import re; f = re.compile(b'abc').search;
x = b'x'*10" "f(x)"
1 loops, best of 3: 113 usec per loop
C:\Python34\python.exe -m timeit -s &qu
Matthew Barnett added the comment:
I think you're probably right.
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Matthew Barnett added the comment:
The 'regex' module is not part of the CPython distribution, so it's not covered
by this tracker.
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Matthew Barnett added the comment:
Surely a case-insensitive dict should use str.casefold, not str.lower?
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Matthew Barnett added the comment:
mappeddict?
Re defaultdict, you could write a dict that does all of these things, called
superdict! :-)
--
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Matthew Barnett added the comment:
It doesn't work in regex, but it probably should. IMHO, if it's a valid
identifier, then it should be allowed.
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New submission from Matthew Walker :
When initializing a class with an empty dict() object as a default initializer,
if it is not overridden, multiple instances of the class will share the
dictionary. IE:
class test(object):
def __init__(self, obj=dict()):
self.obj = obj
a = test()
b
Changes by Matthew Walker :
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Matthew Barnett added the comment:
@rhettinger: The problem with "nodefault" is that it's negative, so that
"nodefault=False" means that you don't not want the default, if you see what I
mean. I think that "suppress" would be better:
mo.groupdict(
Matthew Barnett added the comment:
It's not a bug, it's a pathological regex (i.e. it causes catastrophic
backtracking).
It also works correctly in the "regex" module.
--
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Matthew Barnett added the comment:
Would a "set_encoding" method be Pythonic? I would've preferred an "encoding"
property which flushes the output when it's changed.
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Matthew Barnett added the comment:
A codepoint such as "รฉ" ("\N{LATIN SMALL LETTER E WITH ACUTE}") can be
decomposed to "\u0065\u0301" ("\N{LATIN SMALL LETTER E}\N{COMBINING ACUTE
ACCENT"), but "\u201c" ("\N{LEFT DOUBLE QUOTATION
Matthew Barnett added the comment:
Python 2.7 is the end of the Python 2 line, and it's closed except for security
fixes.
--
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Matthew Barnett added the comment:
That's because it uses a pathological regular expression (catastrophic
backtracking).
The problem lies here: (\\?[\w\.\-]+)+
--
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Matthew Barnett added the comment:
It's probably inappropriate for me to mention that the alternative 'regex'
module on PyPI completes promptly, so I won't. :-)
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Matthew Barnett added the comment:
There are actually 2 issues here:
1. The third argument is 'maxsplit', the fourth is 'flags'.
2. It never splits on a zero-width match. See issue 3262.
--
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Matthew Barnett added the comment:
Ideally, yes, that whitespace should be ignored.
The question is whether it's worth fixing the code for the small case of when
there's whitespace within "tokens", such as within "(?:". Usually those who use
verbose mode use whit
Matthew Barnett added the comment:
Is it necessary to actually copy it? Isn't the pattern object immutable?
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Matthew Barnett added the comment:
There needed to be a way of referring to named groups in the replacement
template. The existing form \groupnumber clearly wouldn't work. Other regex
implementations, such as Perl, do have \g and also \k (for named groups).
In my implementation I
Matthew Barnett added the comment:
'$' will match at the end of the string or just before the final '\n':
>>> re.match(r'abc$', 'abc\n')
<_sre.SRE_Match object at 0x00F15448>
So shouldn't you be using r'\Z' instea
New submission from Matthew Woodcraft:
If I run my code using 'python -m' and there is an unhandled exception, the
tracebacks include lines from runpy.py (and now sometimes from
importlib._bootstrap) which don't provide useful information, and tend to
overwhelm the valua
Matthew Barnett added the comment:
Tim, my point is that if the MULTILINE flag happens to be turned on, '$' won't
just match at the end of the string (or slice), it'll also match at a newline,
so wrapping the pattern in (?:...)$ in that case could give the wrong answer,
Matthew Barnett added the comment:
It certainly appears to ignore the whitespace, even if the "(?x)" is at the end
of the pattern or in the middle of a group.
Another point we need to consider is that the user might want to use a
pre-compil
Matthew Barnett added the comment:
I'm about to add this to my regex implementation and, naturally, I want it to
have the same name for compatibility.
However, I'm not that keen on "fullmatch" and would prefer "matchall&quo
Matthew Barnett added the comment:
re2's FullMatch method contrasts with its PartialMatch method, which re doesn't
have!
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Matthew Barnett added the comment:
OK, in order to avoid bikeshedding, "fullmatch" it is.
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Matthew Barnett added the comment:
FWIW, here's my own attempt at a patch.
--
Added file: http://bugs.python.org/file34538/issue20998.patch
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Matthew Barnett added the comment:
> > -(!ctx->match_all || ctx->ptr == state->end)) {
> > +ctx->ptr == state->end) {
>
> Why this check is not needed anymore?
>
After stepping through the code for that regex that fails, I con
Matthew Barnett added the comment:
The argument isn't a regex, it's a raw string literal consisting of the
characters " (quote), \ (backslash), ' (apostrophe), < (less than) and >
(greater than).
--
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Matthew Woodcraft added the comment:
For the record: the '-I' option (#16499) in Python 3.4 disables sys.path[0]
initialisation (among other things).
--
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New submission from Matthew Fernandez:
Perhaps others wouldn't consider this a bug, but it was definitely surprising
to me. When switching between optimisation levels -OO (optimise and strip
docstrings) and -O (just optimise), you will find the docstrings are still
stripped. E.g.
Matthew Fernandez added the comment:
Ah thanks, Antoine. Sorry, failed to find that issue in my prior searching.
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Matthew Barnett added the comment:
I wouldn't call it a crash. It's an exception.
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Matthew Barnett added the comment:
See also issue #852532, issue #3262 and issue #988761.
--
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___
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New submission from Matthew Lauria:
I noticed that doing set operations on an OrderedDict KeysView only works when
the KeysView is the first input to the expression, and not when it's the second
input. This is not the case for dicts.
Python 3.4.1 (default, May 31 2014, 11:25:02)
[GCC
New submission from Matthew Gilson:
The BaseResult has been replaced by namedtuple. This also opens up all of the
documented methods on namedtuple which would be nice to have as part of the
API. I've taken a stab and re-writing the docs here. Feel free to use it (or
Changes by Matthew Gilson :
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versions: +Python 2.7
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Matthew Gilson added the comment:
Sorry, forgot to remove the mention of BaseResult ...
--
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Matthew Gilson added the comment:
This originally came up on stackoverflow:
http://stackoverflow.com/questions/24200988/modify-url-components-in-python-2/24201020?noredirect=1#24201020
Would it be helpful if I also added a simple example to the docs as in the
example there
Matthew Barnett added the comment:
Interesting.
In my regex module (http://pypi.python.org/pypi/regex) I have:
bool(regex.match(pat, "bb", regex.VERBOSE)) # True
bool(regex.match(pat, "b{1,3}", regex.VERBOSE)) # False
because I thought that when the VERBOSE flag is turned
Matthew Barnett added the comment:
The question is whether re should always treat 'b{1, 3}a' as a literal, even
with the VERBOSE flag.
I've checked with Perl 5.14.2, and it agrees with re: adding a space _always_
makes it a literal, even with the 'x' flag (/b{1, 3}a/x
Matthew Barnett added the comment:
The same problem occurs with both `False` and `True`.
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Matthew Barnett added the comment:
In function SRE_MATCH, the code for SRE_OP_GROUPREF (line 1290) contains this:
while (p < e) {
if (ctx->ptr >= end ||
SRE_CHARGET(state, ctx->ptr, 0) != SRE_CHARGET(state, p, 0))
RETURN_FAILURE;
p += sta
Matthew Barnett added the comment:
OK, here's a patch.
--
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Added file: http://bugs.python.org/file28321/issue16688.patch
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Matthew Barnett added the comment:
I found another bug while looking through the source.
On line 495 in function SRE_COUNT:
if (maxcount < end - ptr && maxcount != 65535)
end = ptr + maxcount*state->charsize;
where 'end' and 'ptr' are of type &
Matthew Barnett added the comment:
I found another bug while looking through the source.
On line 495 in function SRE_COUNT:
if (maxcount < end - ptr && maxcount != 65535)
end = ptr + maxcount*state->charsize;
where 'end' and 'ptr' are of type &
Matthew Barnett added the comment:
I haven't found any other issues, so here's the second patch.
--
Added file: http://bugs.python.org/file28325/issue16688#2.patch
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Matthew Barnett added the comment:
Here are some tests for the issue.
--
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Matthew Barnett added the comment:
Oops! :-( Now corrected.
--
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___
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Matthew Barnett added the comment:
The patch "issue1075356.patch" is my attempt to fix this bug.
'PyArg_ParseTuple', etc, eventually call 'convertsimple'. What this patch does
is to insert some code at the start of 'convertsimple' that checks whether the
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