to a date. For example:
>>> import datetime
>>> dt = datetime.datetime.now()
>>> print dt
2006-04-17 18:19:38.698925
>>> print dt.date()
2006-04-17
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Kun> how do you parse out a pre-specified time that is extracted via
Kun> sql? i don't think something like dt.date() works because it
Kun> doesn't work with a string? correct me if i'm wrong.
I think MySQLdb automatically returns datetime objects when the c
le of creating properties, you could
probably dream up some other syntax, but I suspect this notion will pop up
again. Even if you comment the heck out of a lying class definition, tools
like pylint and pychecker will think you're creating a class anyway and
incorrectly apply th
why the desired output of examples 1 and 6 is the
same, since the URLs are clearly different.) You don't mention having tried
the urlparse module, so I thought I should ask: have you tried using
urlparse?
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Thx,
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Wildemar> Are there any concepts that python has not borrowed, concepts
Wildemar> that were not even inspired by other languages?
I'd say Guido's willingness to borrow heavily from the best ideas present in
other languages ranks right up there as one of its key concepts
>> Does Perl have something like Python's repr() function?
John> perldoc Data::Dumper
Thanks. Just what the doctor ordered (after setting Useqq).
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ither String::Escape nor Inline::Python installed.
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placid> Does anyone have binary for MySQLdb (python 2.4.3, MySQL 5.0a) ?
Platform? Last I checked a few weeks ago, MySQLdb didn't yet work with
MySQL 5.0.
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Michael> So why not make "x % y" for floats behave exactly like it does
Michael> for integers and provide a separate operation with your
Michael> described behavior?
%% anyone?
(Skip ducks and runs...)
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ue a
whois command directly, but I'm hoping there's some module out there that
will do the domain-to-whoisserver mapping and all the output parsing for me.
Any candidates other than the two I've found so far?
Thx,
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x27;x'
1,16-1,18: NUMBER '10'
1,18-1,19: OP '('
1,19-1,20: OP '-'
1,20-1,21: NUMBER '4'
1,21-1,22: OP ')'
1,22-1,23: NEWLINE '\n'
2,0-2,0:ENDMARKER ''
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hat's not what __all__ is used for. Try this:
from mm import *
The only name added to your namespace will be getsize1.
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ot;list"? Note that they are unordered.
These two sets are equal:
set(['b', 'a', 'c'])
set(['a', 'b', 'c'])
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Someone in hiding wrote:
> Hi, I'm interested in using python to start writing a CAD program for
> electrical design.
Google for PythonCAD.
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m would object. (Dad's gone, Chris does a
little Python programming from time-to-time.) I say go for it...
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#x27;t a
huge problem. For large dictionaries (millions of keys) might you have some
long chains? Or in an effort to reduce the chain length, wind up using so
much virtual memory that you wind up wrecking performance by swapping?
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Lance> May have a complicating issue with the array? Have the numbers
Lance> have been interpreted as strings? I have been pulling them from
Lance> a Word doc using regex's
[int(float(x)+0.5) for x in Test]
S
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d out PythonCAD? <http://www.pythoncad.org/>. I
don't use it, but the guy's been trickling out new releases periodically for
the past four years or so (30 so far). Might be worth a peek.
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= {}
>>> for n in xrange(10**7):
... d[n] = hex(n % 1000)
...
I still wind up with 647MB VM. The dictionary and its keys are what consume
all the memory, and those keys are as simple as you can get.
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it achieves that nice short chain length by consuming gobs of
memory. A dictionary with 10**7 keys is going to chew up lots of memory.
There's nothing particularly magical about dictionaries in this respect.
They are good examples of a classic time-space tradeoff.
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ommand-line however? Should'nt the CFLAGS be propagated to the
Toon> Makefile that is generated by configure? Or is there any other way
Toon> to do this?
I agree, the Python configure/Makefile combination doesn't conform very well
to current GNU style in this regard. Try setting EXTRA_CFLAGS instead of
CFLAGS.
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ay in 32bit instead of 64bit (while python itself is in
Toon> 64bit)
That seems like a bug in distutils. Can you submit a help ticket?
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t bother unless it provides some major structural
advantage to your code. If you think you need more than a couple CPUs, you
probably want a multi-process model anyway so you can leverage multiple
computers on a LAN (think Beowulf-style multiprocessing).
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nt to one of the functions in your C
extension module? If so, yup, you get the list argument and march through
it element-by-element, then march through those tuples. For more detail on
argument handling in C, read here:
http://www.python.org/doc/api/arg-parsing.html
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12:48:31)
[GCC 3.4.1] on sunos5
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> sys.stdout.encoding
'646'
>>> import codecs
>>> codecs.lookup("646")
(, , , )
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lialie> The list has a random length.
lialie> Do you mean to do it in this way?
lialie> use PyTuple_Size(args), in a loop
lialie> use PyTuple_GetItem(args, i)
lialie> or
lialie> use PyArg_VaParse?
Sketch (that means off-the-top-of-my-head, untested, 99.9% guaranteed
inco
on you have your
Mac's Terminal window set to cp1252. (Does it go there? I'm at work right
now so I can't check).
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on't
think a system can be relied upon to detect its own demise, as the recent
PC/Mac commercial about restarting illustrates:
<http://www.apple.com/getamac/ads/>.
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om/news.ars/post/20060524-6903.html>
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the authors
apparently didn't use sgmlop (at least it's not mentioned) to boost the
decode performance of XML-RPC.
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x
it in list comprehensions. I believe at some point in the future they may
just go away or become syntactic sugar for a gen comp wrapped in a list()
call.
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ime. The files they create are not simple text files.
They are organized to permit quick access to records by key and to permit
average time fast insertion.
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i< TABLE.nsymbols; i++) ...). This is
data returned from a C library, not something I'm building in Python to pass
into C.
Thx,
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ast):
File "", line 1, in
TypeError: unsupported operand type(s) for |=: 'set' and 'list'
>>> s |= set([4,5,6])
>>> s
set([1, 2, 3, 4, 5, 6])
Why is that? Doesn't the |= operator essentially map to an update() call?
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l?
I'm going to craft a little table for the SpamBayes FAQ page and it will
save me a bunch of time if I don't have to go wandering in the twisty little
mazes that are Internet mail sites.
Thanks,
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probably represent data from single-column
files, not double-column files with '8' or 'f' as the delimiter.
I would be happy to get rid of it in 3.0, but I'm also aware that some
people use it. I'd like feedback from the Python community about this. If
I removed it is t
subprocess module is also problematic.
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explain the rationale for using threads
in Python to someone who is experienced with multithreading in other
languages (like C/C++). Maybe a compare-and-contrast sort of document?
Thanks,
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een ported to it
yet, it might be helpful if you explained why Python 2.6 + MySQLdb isn't
sufficient for your needs.
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like to do it without calling any C API functions. If at all
possible the user-defined commands should work even if there is no process
available. (e.g., when working with core files).
Any suggestions?
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e. I'm not sure I can do much with that without
having a process to use. Ideally:
print "".join([ chr(x) for x in *$__f->s...@$__f->length])
The question is, how do you do that in gdb-speak???
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on Python 3.0 that is the place to ask. Of
course, like all open source software if you provide a patch in the project
tracker things will happen faster.
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[mimetype weirdness reported]
Sion> Is this a bug?
Might be. Can you file a bug report in the Python issue tracker with a
small script that demonstrates the behavior?
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c.
Thanks,
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Paul> That's interesting, got a reference? (no pun intended)
http://letmegooglethatforyou.com/?q=lock+free+reference+counting
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st and am not a C++ person, so may have
read what you saw but not recognized it in the C++ punctuation soup. I
couldn't find what you referred to. Can you provide a URL?
Thanks,
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Rhodri> Just do the locking properly and worry about optimisations
Rhodri> later.
The locking is already done properly (assuming we are discussing CPython's
reference counting). Now is later. People are thinking about lots of
optimizations, this is just one of them.
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Ski
erence count will often be in the
processor's local cache. (Presumably, if the current thread is going to
Py_DECREF the object it's been working with the object's state recently.)
The stuff I read suggested that simply locking the local cache would be
significantly faster than having t
ror message in the bounce? Feel free to send your message to me and
I'll forward it. (I'm one of the webmasters.)
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so
Carl's notion of three types of objects breaks down then.
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relevant updates?
Steven> Should I ask about it on the python-dev mailing list, or just
Steven> wait until somebody happens to notice it?
But you've already noticed it. ;-)
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to
Steven> look at it, or is that rude?
You might want to peruse some of the links on this page:
http://www.python.org/dev/
That might give you some insight into the Python development process and how
you fit into it.
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ypes modules.
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;t even look at the message itself until I saw
it come through in my email.
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r> Seems like the level of spam is increasing in the last week, and
r> today has been bad. How are the spambytes coming along?
Spambayes is doing fine, but it only filters spam for the mailing list. It
has no effect on the Usenet side of things (comp.lang.python).
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Skip Mon
The subprocess module was added in Python 2.4. I'm running 2.4.5 at work.
I know it's seen many bugfixes since first released. Is the version in 2.4
robust enough to use in preference to os.popen and friends?
Thx,
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Roy> I need to run a command using subprocess.Popen() and have stdin
Roy> connected to the null device.
os.path.devnull should do what you want:
>>> os.path.devnull
'/dev/null'
>>> import ntpath
>>> ntpath.devnull
'
>> Any suggestions for a beginer on what to use for version control?
Chris> I like Mercurial (hg) personally...
Me too. It's perfect for little one-person things. (It's probably good for
other stuff as well, but I certainly like how easy it is to use for
standalon
different in RISCOS. Perhaps it was only ever added to Python to support
that platform.
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Outlook
messages.
http://spambayes.svn.sourceforge.net/viewvc/spambayes/trunk/spambayes/Outlook2000/
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Roy> I'm debating whether I should do the Python version with SWIG or
Roy> ctypes.
Unless your C++ library exports a C api I don't think you can use ctypes to
make it available within Python.
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gt; then < " > makes the whole process quite a hassle.
:rollseyes:
I hope there was a missing smiley in that post. If a couple extra parens
destroys your debugging productivity I suspect you need a fresh approach to
the task.
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rce string in
any given character set are because of errors in the source, not errors in
Python.
OTOH, the characters in position 49-55 look like plain old ASCII to me.
Does Shift-JIS have ASCII as a proper subset?
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lkcl> Very simple question: how do you apply a decorator to an entire
lkcl> module?
Function-by-function or class-by-class. There is no decorator support for
modules.
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functions (def) and classes
(class). import is not the same as a definition.
It's not obvious to me that module decorators would use precisely the same
sort of syntax as function and class decorators.
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ernal numpy module. In theory you
could also try to find a different malloc library which has better policies
about returning memory to the system.
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just ask Subversion for a diff between it and the previous
version. For example:
% pwd
/Users/skip/src/python/trunk
% svn info Lib/os.py
Path: Lib/os.py
Name: os.py
URL: svn+ssh://[EMAIL PROTECTED]/python/trunk/Lib/os.py
Repository Root: svn+ssh://[EMAIL
mber off the top of my
head), so it's not compiled over and over again.
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azrael> is it possible to save a python object into a sqlite database as
azrael> an atribute of type BLOB
Sure. Just pickle the object and save the resulting string.
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Bruno> Or if you want something more portable, serialize the object to
Bruno> json. At least you'll have a chance to deserialize it with some
Bruno> other language.
Assuming json can serialize more-or-less arbitrary Python objects. Can
it serialize class instances?
Bruno> Most of the time, you want to serialize the instance's __dict__.
Does it recreate an instance at the other end or just a dict?
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> If you want a Python object store, you'll be better looking at
Bruno> ZODB, Durus or friends. --
Or SQLAlchemy or SQLObject.
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r performance if you open the file without the
third arg:
huge = io.open("C:\HUGE_FILE.pcl",'r+b')
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ource of errors in a mixed development
environment (people using text editors with different tab stops). Better to
not allow them to be mixed.
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File "", line 1, in ?
AssertionError: (2, 4, 5, 'final', 0)
vs:
>>> import sys
>>> print(sys.version_info)
(3, 0, 0, 'final', 0)
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entation to the
human observer but which looks like it has different indentation (and thus
different semantics) to the byte code compiler. There is often no warning.
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heir
Python installation. Your simple version test would miss that.
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atches.
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Sam> What are my options for a syslog server to receive the messages?
Sam> Rsyslog looks like it would be good. Anyone know anything else?
If you're running on a Unix system of any type you should have syslog by
default. You shouldn't need to install anything.
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Python :: 3.0" tag, but not the more inlusive tag
above. I just updated the information to include it so it now appears in
the search results.
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ot;from __future__ ..." isn't really an import statement in the usual sense of
the term. It affects the byte code compiler immediately and I believe only
when using that syntax. That it actually adds a name to the module's
namespace is not really used (at least, not often).
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for sys.argv[1:].
Pointers to other documentation or tutorials on the topic cheerfully
appreciated.
Thanks,
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Kermit> I can't understand the second sentence because of the "for
Kermit> ... in".
Google for "python list comprehensions".
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ate packages. You might have the latter but not the former.
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ning the X Window
System. In many cases multithreading is the best way around this problem.
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Leo> Any special reasons?
Nobody thought to add it? Got a patch?
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u've enabled will be statically linked into the Python
interpreter executable and not built as shared objects.
At least that's how I recall it from the days before Python supported shared
libraries. It's been awhile.
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at would give me a directory for my
feba> use only, instead of something where you can only upload one at a
feba> time. I'd especially like to avoid stuff that uses CAPTCHAs
feba> and/or forced waiting periods.
http://pastebin.com/?
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Reimar> Hi what has happened to PIL? No updates since two years.
It's well-written, stable code. As far as I know it does what people want
(at least it's done everything I've needed when I've used it). Why should
it matter that there hasn't been an official rel
redrik Lundh? http://effbot.org/
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by people with a C/C++ background. I
don't think you can necessarily chalk that up to %-string avoidance. They
learn that + will concatenate two strings and don't look further.
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p
r> the language, and it's not too late, dawn is not upon us yet.
Bruce Eckel proposes removing self from argument lists:
http://www.artima.com/weblogs/viewpost.jsp?thread=239003
Guido responds:
http://neopythonic.blogspot.com/2008/10/why-explicit-self-has-to-stay.html
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on, Python is probably much more popular than
Perl and Tcl. Maybe not ahead of Ruby due to RoR. etc etc.
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Carl> ...shouldn't poeple who spend all their time following up to
Carl> trolls, or starting new threads about trolls, being doing
Carl> something else?
Sure. It was just a momentary break from work, as is this. I thought an
implied smiley was enough, but I guess not.
examples (maybe one example
each of reading and writing?)
Thanks,
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Steve> Look at the pexpect module - you can run interactive tasks
Steve> through that.
Thanks. Worked like a charm.
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Grant> -u" doesn't work post again, and I'll try to find it.
Would be helpful even if I don't need it for this task, as I've not been
able to find any simple examples on the net. (Maybe there's a recipe at
ActiveState, but Google didn't pick up anything
Grant> Are you sure it's not Python buffering its input? Have you tried
Grant> "python -u mympstat.py"?
Nope. -u unbuffers stdout and stderr, not stdin. It really must be mpstat
being uncooperative.
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