New submission from David W. Lambert:
doc string suggests str is a valid init argument. The code strongly
discourages this.
ctypes.create_string_buffer
def create_string_buffer(init, size=None):
"""create_string_buffer(aBytes) -> character array
create_strin
David W. Lambert added the comment:
Sorry again. You probably didn't follow the link I posted to see the
problem origination. Which was "Cannot subclass str." I generalized
this to tuple.
On Tue, 2012-12-04 at 20:08 +, R. David Murray wrote:
> R. David Murray added t
David W. Lambert added the comment:
The apparent problem was that the constructing str with __init__ failed. I now
recall that immutables take initial values in the __new__ method. Sorry!
Otherwise, it was quite thoughtful for you to search for a problem. Dave
New submission from David W. Lambert:
http://forums.devshed.com/newreply.php?do=newreply&noquote=1&p=2838814
>>> class c(tuple):
... def __init__(s,a,b):
... tuple.__init__(s,a)
... self.b = b
...
>>> c(tuple(),666)
Traceback (most recent call last):
File "
New submission from David W. Lambert :
I was unable to solve this question.
http://forums.devshed.com/python-programming-11/setting-tkinter-checkbox-default-graphical-state-865148.html
Summary: Trouble initiating button in "checked" state.
If you an
New submission from David W. Lambert :
I sent this question to tu...@python.org as advertised at
http://mail.python.org/mailman/listinfo/tutor
The message was returned, and we still need an answer to the question. I'll
post it as a separate bug.
Thank you, Dave.
From: David Ward La
New submission from David W. Lambert :
There are a number of issues with subprocess and __exit__ , 12494 status fixed
among them.
Program (which doesn't work as I had hoped, but that's not the issue):
'file p.py'
import subprocess as S
with
S.Popen(('cat',&
New submission from David W. Lambert :
http://docs.python.org/py3k/library/multiprocessing.html
Indentation is incorrect as displayed and copied from google chrome browser:
from multiprocessing import Process
def f(name):
print('hello', name)
if __name__ == '__
New submission from David W. Lambert :
http://docs.python.org/py3k/library/multiprocessing.html
Doc/library/multiprocessing.rst refers to "SimpleHTTPServer.HttpServer". The
patch changes this to "SimpleHTTPRequestHandler" although you may prefer
"http.server.SimpleH
David W. Lambert added the comment:
http://en.wikipedia.org/wiki/Total_order
For pair of items from a set, (that's the total)
if a <= b and b <= c then a <= c (part of the order)
if a <= b and b <= a then a compares the same as b, a == b, (the
other part of the
David W. Lambert added the comment:
I apologize for the noise.
Yes, I'll read the article carefully and provide changes as a unified
diff against the subversion trunk.
On Wed, 2010-03-24 at 08:20 +, Martin v. Löwis wrote:
> Martin v. Löwis added the comment:
>
> David, c
David W. Lambert added the comment:
There is an incredible number of frameworks
s/is/are/
The majority of users is best
s/is/are/
o work together as good as possible.
s/good/well/
jects can be saven in a st
s/saven/saved/
Thank you. I'm through fo
David W. Lambert added the comment:
you can rely an already existing
rely on an
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David W. Lambert added the comment:
There is a number of middlewares
are
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David W. Lambert added the comment:
much easier as is is specially designed
more easily and is especially designed
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"Another problem ist the basic concept"
is
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David W. Lambert added the comment:
In same file, "intermangled with Python” and it has a “Publisher” which
destignates"
intermingled?
designates?
Thanks, Dave.
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New submission from David W. Lambert :
http://docs.python.org/py3k/howto/webservers.html
The path to the interpreter in the shebang (#!/usr/bin/env python) must be
currect.
Sorry man there are a great many distractions here.
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New submission from David W. Lambert :
http://docs.python.org/py3k/howto/webservers.html
The low-level view
When a user enters a web site, his browser makes a connection to the site’s
webserver (this is called the request). The server looks up the file in the
file system and sends it back to
David W. Lambert added the comment:
I recall an experience with a random file in /dev that was considerably slow
after consuming its cache. I used it as a seeder. I've now got an ubuntu
system for which /dev/urandom gives me a hundred million bytes quickly.
Perhaps a nosy one has
New submission from David W. Lambert :
http://docs.python.org/dev/py3k/library/stdtypes.html#index-559
Proposal: remove last sentence from
"class.__bases__
The tuple of base classes of a class object. If there are no base
classes, this will be an empty tuple."
Reason: Sentence is
David W. Lambert added the comment:
Further isolation, following change removes segmentation fault:
digital_roots = tuple(map(digital_root,factorization))
becomes
digital_roots = [digital_root(factor) for factor in
factorization
New submission from David W. Lambert :
'''
This brute [possibly a] solution to
http://projecteuler.net/index.php?section=problems&id=159
causes segmentation fault.
$ p3 # an AMD 64 bit build.
Python 3.1.1 (r311:74480, Oct 2 2009, 12:29:57)
[G
David W. Lambert added the comment:
Thank you!
A prime sieve variant is a better way to generate the generalized
Hamming numbers I'm after, at least if the maximum is known ahead of
time.
Dave Lambert
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New submission from David W. Lambert :
Raymond Hettinger posted clever Hamming number generator,
http://code.activestate.com/recipes/576961/
which I tried to modify. The function gives incorrect output when
called as hamming_numbers(shorthand = True). It seemed reasonable to
expect the two
New submission from David W. Lambert :
'''
RuntimeError: maximum recursion depth exceeded in cmp
Python 3.1.1 (r311:74480, Oct 2 2009, 12:29:57)
[GCC 4.3.3] on linux2
'''
import itertools,pprint
combos = itertools.combinations
def connect(nod
David W. Lambert added the comment:
I believe this issue was resolved---expect it in a future release.
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problem also exists in 2.6.
It's a, in my humble opinion, release blocker.
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New submission from David W. Lambert :
lambertdw$ p3
Python 3.1.1 (r311:74480, Oct 2 2009, 12:29:57)
[GCC 4.3.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> not 23
False
>>> not(23
David W. Lambert added the comment:
File objects should not be discussed in the tutorial to emphasize that
the file type is gone.
File objects should be in the tutorial as a useful familiar concept.
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New submission from David W. Lambert :
http://docs.python.org/dev/py3k/tutorial/inputoutput.html#methods-of-
file-objects
Is it proper to discuss file objects in py3K?
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New submission from David W. Lambert :
See thread
http://groups.google.com/group/comp.lang.python/browse_thread/thread/85e
c714aa6898d84#
En Sun, 22 Mar 2009 19:12:13 -0300, Benjamin Peterson
escribió:
> Gabriel Genellina yahoo.com.ar> writes:
>> The undocumented behavior i
David W. Lambert added the comment:
My file class extends text files with seek or read through condition or
pattern, providing an awk like pattern{action} task separation.
If I allow a pre-existing stream into my constructor (subprocess.Popen
my favorite) I still suffer the same garbage
David W. Lambert added the comment:
#OOPS! I forgot the subtlety.
#I must also retain the stream
#else it gets collected.
#Nasty.
import io
class file(io.TextIOWrapper):
'''condensing code for this list without test is a no no!'''
def __init__(s
David W. Lambert added the comment:
# With py3Krc1 it took me days to figure out how to
# replace my base class file. Granted, there were
# issues with io module at the time. Following met
# my need.
import io
class File(io.TextIOWrapper):
'''Open a text file w
David W. Lambert added the comment:
(I have no clue where the servers are.)
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David W. Lambert added the comment:
(with similar links for strpfime).
These are reasons a patch may be worth while:
x difficult to work around using ctypes module with c library.
x help(strftime) advises the programmer to see the reference manual for
formatting codes.
x Searching
David W. Lambert added the comment:
http://linux.die.net/man/3/strftime
or this link may be in USA, if you care:
http://www.manpagez.com/man/3/strftime/
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David W. Lambert added the comment:
Resolution of this may be applicable to Issue3446 as well.
"center, ljust and rjust are inconsistent with unicode parameters"
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David W. Lambert added the comment:
(As I recall) in python-dev mailing list Ray claimed he could clean up a
cited active state recipe to address this issue. He succeeded to the
extent I'm aware---he's the author of
http://code.activestate.com/recipes/576685/.
I haven't use
David W. Lambert added the comment:
That's the best version I recall seeing at activestate.
Still, I'd deprecate and remove > and >= from mathematics.
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David W. Lambert added the comment:
With older versions of each timedelta rejects the data type. Maybe
that's a good resolution?
$ /usr/local/bin/python2.4
Python 2.4.2 (#2, Jul 7 2006, 10:20:47)
[GCC 3.4.5 20051201 (Red Hat 3.4.5-2)] on linux2
Type "help", "copy
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David W. Lambert added the comment:
I completely agree that this is a documentation issue.
Also, or perhaps for foolish completeness, in
http://docs.python.org/3.0/library/stdtypes.html
we would point out that the following group of string methods also work
for bytes and bytearrays. Of
David W. Lambert added the comment:
0->kbk
I avoid idle altogether and run python in emacs shell buffer. Switching
windows usually involves mice. Mice are evil.
emacs has gazillions of features.
artist mode (oops, mice!)
rectangular regions,
registers,
25 (hundreds with C-{di
David W. Lambert added the comment:
I think you need this order preserving paradigm using python as is:
def xhtmlNode(tag,*args):
...
xhtmlNode('div', {'id':'sidebar'}, 'Hello world')
Less work in xhtmlNode might offset the extra work in writi
David W. Lambert added the comment:
You can sneak them in thusly:
def f(**kwargs):
print(kwargs)
f(**{'class':'sidebar'})
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David W. Lambert added the comment:
Use cases are easy to find.
So easily found that there's probably a sound reason for reserved words.
The proposal couples lexical analysis to the parser.
# syntax error or name error?
def f():
class
return
def f(class):
class
r
David W. Lambert added the comment:
granted, this isn't terribly difficult:
'\n'.join(textwrap.fill(line) for line in text.split('\n'))
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David W. Lambert added the comment:
I'd like textwrap option to preserve new lines. Actual case:
I have a code that produces cryptograms meant to be printed and solved
with paper and pencil. Standard format for cryptogram inserts space
character between each character of the original
David W. Lambert added the comment:
Nice. I had thought of this a while ago but found counter example,
probably using the empty iterator
def f():
raise StopIteration
yield
I didn't realize "next" had optional argument.
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New submission from David W. Lambert :
Following instructions in
http://docs.python.org/dev/3.0/library/csv.html#module-csv
I opened file in binary mode. This might be simply a documentation
problem or it may run deeper. Text mode works on red hat linux system.
Here's the use:
>&
David W. Lambert added the comment:
Fails also on this system.
$ p3
Python 3.0.1 (r301:69556, Feb 13 2009, 23:52:55)
[GCC 3.4.6 20060404 (Red Hat 3.4.6-3)] on linux2
(...)
>>> # use both hangs
(...)
>>> p.start()
>>> p.join()
(hmm la do diii laaa...)^C
Trace
New submission from David W. Lambert :
x/lib/python3.0$ diff --unified turtle.py.bak turtle.py
--- turtle.py.bak 2009-02-17 11:29:15.0 -0500
+++ turtle.py 2009-02-17 11:29:37.0 -0500
@@ -2265,7 +2265,7 @@
"outline": positive number
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David W. Lambert added the comment:
Answering first question msg81873.
Without colon separator, this might be considered confusing:
>>> (
... '{d}{s}{f}{f}'.format(3, 'foo', 3.14, 2.72),
... '{d}{s}{f}{f}'.format(d=3, s='foo', f=3
David W. Lambert added the comment:
I am net yet fluent in format method. I meant
":" where "#" appeared.
Anyway, I think you need the colon.
If from
print('{0:9}'.format(33))
you make the argument number implicit and remove the colon you'd get
prin
David W. Lambert added the comment:
'{d}{s}{f}'.format(3, 'foo', 3.14)
is possibly unclear,
but is shorter than
'{#d}{#s}{#f}'.format(...)
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David W. Lambert added the comment:
I run my shells with low priority so I can sneak around and kill them.
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David W. Lambert added the comment:
"x |= x>>4"
Are you (Ray) sure you didn't mean
"x ^= x>>4"?
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New submission from David W. Lambert :
help function is not current, then again, neither is my python3.
Possibly sequencemethods[12] are eradicated.
$ p3
Python 3.0rc1+ (py3k, Nov 5 2008, 14:44:46)
[GCC 3.4.6 20060404 (Red Hat 3.4.6-3)] on linux2
Type "help", "copyright
New submission from David W. Lambert :
Allow logger object log message creation methods using ''.format method.
have:
logger_object.info('%s','lazy is better')
logger_object.debug('{0!s}'.format('wasted effort'))
want:
logger_object.
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David W. Lambert added the comment:
Python 3.0rc1+ (py3k, Nov 5 2008, 14:44:46) [GCC 3.4.6 20060404 (Red
Hat 3.4.6-3)] on linux2 Type "help", "copyright", "credits" or "license"
for more information.
>>> ' '.
David W. Lambert added the comment:
#Ah! Not a problem. You need globals() and locals() dictionaries.
# as a python3 script, this message produces next couple lines output.
#method one
#yup, global a is gone
#method two
#{'gv': 'local here', 'name': '
David W. Lambert added the comment:
memcpy won't work if the data type changes. (possibly signed <->
unsigned same-byte-count works).
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David W. Lambert added the comment:
The alternative is unreasonable. I doubt you'd be happy with this:
a = 'Something'
def variable_both_global_and_local()->Exception('No good!'):
del a# delete a from global name space
a = 'anotherthing
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David W. Lambert added the comment:
My second answer is irrelevant. Function receives the global data as
well as the arguments.
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David W. Lambert added the comment:
The del statement makes the variable local, as alluded to by
http://docs.python.org/dev/3.0/reference/simple_stmts.html#the-del-
statement
The manual is clearer about assignments, which are local unless declared
global or nonlocal.
For other question, me
David W. Lambert added the comment:
The value of one of the arguments controls how many digits there are.
Certainly if you rounded $10 to the nearest cents you'd expect $10.00.
Thus round(10,2) should be 10.00. Without using decimal module, the
best we can do is produce 10.0.
I'
David W. Lambert added the comment:
I'd prefer round(x,positive_integer) return float. Returning int is a
bit of a lie, except that the decimal module is available to avoid this
sort of lie.
For non-positive integer roundings I'd like an integer return.
In my opinion, we'
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David W. Lambert added the comment:
Probably a better prime factor algorithm uses Sieve of E. to generate
primes through int(1+sqrt(n)) and test these.
The other algorithm uses a custom generator anyway. Oh well, good luck,
I'll shut up.
You do have use cases that I couldn't think
David W. Lambert added the comment:
Nice. Now I know that $e$ is a least transcendental number. But I
can't figure out why inserting this code into your file (and removing
some "itertools.") is difficult or unreadable. I maintain a personal
library of modules that I don&#x
David W. Lambert added the comment:
(prospective, not perspective programmer)
Spelling out the possibilities as suggested in Message80563 makes better
sense to me than writing in words the logic handling the mode argument
of the io.open function. (Perhaps there is a clearer implementation
David W. Lambert added the comment:
I disagree. You propose to examine the trees but ignore the forest.
The perspective programmer needs to understand what is a file.
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David W. Lambert added the comment:
This note is simply a reminder that Antoine's 'from __main__ import *'
solution fails in python3. Also, resolution of this issue probably
could incorporate Issue1397474.
>>> import timeit
>>> timeit.timeit('None'
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David W. Lambert added the comment:
For unittests I recommend two things instead of need for doctest change.
A decoupled strict test to prove that the iterator works, and this class
to publish,
class Tped_use_cases(...):
def test_Marker_iteration(self
David W. Lambert added the comment:
My goodness, that's the starting base sequence to gene 38c, chromosome 4
of the Columbian caldera cricket! But seriously...
1) The relevant part of the doc string is this, and this is how it
should read (your argument being "if doctests prov
David W. Lambert added the comment:
(Actual command stream includes chmod +x ./s.sh)
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David W. Lambert added the comment:
Related, but outside python realm, this error likewise confuses:
$ cat < s.sh
#! invalid path
echo hi
EOF
$ ./s.sh
zsh: no such file or directory: ./s.sh
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David W. Lambert added the comment:
http://docs.python.org/dev/3.1/library/unittest.html#module-unittest
Search for "cmp". There are two references. I apologize if I
misunderstand issue 1717,
--
title: cmp gone---What's new in 3.1 -> cmp g
David W. Lambert added the comment:
I disagree. Purpose of __doc__ is to explain functionality all at once.
This command idiom is useful:
$ python -c 'from a_module import thing; help(thing)'
The doctest module is a lightweight nicety that helps verify that which
is suit
David W. Lambert added the comment:
I had thought highly of the "mull it over for a week" plan. After a
week we'd decide to follow Stephen Wolfram's lead, which seems to be the
current patch. I haven't yet used the python permutations iterator,
although I used to
David W. Lambert added the comment:
I try to "not know" excel. Does it have any other means to represent an
empty set?
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David W. Lambert added the comment:
Mathematica indicates for the user to define it later. An error.
In[3]:= Permutations[{1,2},{-2}]
Permutations::nninfseq:
Position 2 of Permutations[{1, 2}, {-2}]
must be All, Infinity, a non-negative integer, or a List whose
first
element
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