s" as if
Microsoft got it wrong; it did not -- Unix made up a convenient fiction
and people went along with it. (And, yes, if Unix had been there first,
their convention was, in fact, better).
So, sorry for venting, but I have bee wanting to say this in public
for years.
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
waiting for me
when I move to Python3.
So a big thank you is in order.
And thank you for, having done that, not simply smiling because your
work was lighter. Instead you described a great work path and handed
an attaboy to a pair of people that richly deserve attaboys.
--Scott David Daniels
ments, which
appears to be the biggest convention :-)
Perhaps: "The comments are a directive to delete the comment if
you happen do this."
--Scott David Daniels
scott.dani...@acm.org
--
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bzip compression as well, and about the "find which bits
means what" was where my process broke down.
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
. Maybe your groundwork can help me out
with that.
I must be in a really cranky mood today.
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
jects
Since nobody else has mentioned it, I'd point you at Mock objects:
http://python-mock.sourceforge.net/
for another way to skin the cat that it sounds like has been
biting you. They are surprisingly useful for exploratory
and regression testing.
--Scott David Daniels
scott.dani...@acm.o
e I don't think control characters are likely in the interpreter
file name.
You could work around this by creating a symlink (or even hard link to
the python executable named "python\r"
--Scott David Daniels
scott.dani...@acm.org
--
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in
order to make equal immutable values identical, you'd
have to end each operation producing an immutable result
with a search of all appropriately typed values for one
that was equal.
--Scott David Daniels
scott.dani...@acm.org
--
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.6.4? Does your test work in 2.6?
Also consider how 2to3 translates the problem section(s).
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
these are numbers:
a, b = [x.__add__ for x in [1, 2]]
print a(10)
print b(10)
--Scott David Daniels
scott.dani...@acm.org
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aqs/smart-questions.html
Hint: I don't know your CPU, python version, IDLE version, matplotlib
version, nor do you provide a small code example that allows me to
easily reproduce your problem (or not).
--Scott David Daniels
scott.dani...@acm.org
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ion _very_ soon) -- get to python dev immediately if
you have problems with the release candidate.
--Scott David Daniels
scott.dani...@acm.org
--
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George Trojan wrote:
Scott David Daniels wrote:
...
And if you are unsure of the name to use:
>>> import unicodedata
>>> unicodedata.name(u'\xb0')
'DEGREE SIGN'
> Thanks for all suggestions. It took me a while to find out how to
> configure my ke
gt;>> q = s.decode('utf-8')
>>> degrees, rest = q.split(u'\N{DEGREE SIGN}')
>>> print degrees
48
>>> print rest
13' 16.80" N
And if you are unsure of the name to use:
>>> import unicodedata
>>> unicodedata.name(u'\xb0')
'DEGREE SIGN'
--Scott David Daniels
scott.dani...@acm.org
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l you what locations are being checked for files.
Normally you should:
1) tell us python version and which OS (and OS version) you are using.
2) include a pasted copy of exactly what did not work, along with the
resulting output, and why you did not expect the output you got.
--
art making real money from it, like ActiveState you'll help out
the community that is giving you its support.
--Scott David Daniels
scott.dani...@acm.org
--
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Ben Finney wrote:
Scott David Daniels wrote: ...
class Initialized(ClassBase):
@classmethod
def _init_class(class_):
class_.a, class_.b = 1, 2
super(Initialized, class_)._init_class()
Mea culpa: Here super is _not_ a good idea,
[…]
Why is ‘super
her than looping in the way you might in C for example, the
numpy where might be quicker if you have a big image. Just a
thought...
And a good thought too...
I think what Martin is telling you is:
Look to numpy to continue working on the array first.
byte_store = imgL.astype(np.uint8)
I
Scott David Daniels wrote:
...
Look into metaclasses:
...
class Initialized(ClassBase):
@classmethod
def _init_class(class_):
class_.a, class_.b = 1, 2
super(Initialized, class_)._init_class()
Mea culpa: Here super is _not_ a good idea, and I had
tialized.a, Initialized.b
--Scott David Daniels
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make the easy path the fast path, and more will use it;
provide two ways, and the first that springs to mind is the one
used.
--Scott David Daniels
scott.dani...@acm.org
--
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candide wrote:
Hi
I was wondering if there exists somme way to clear memory of all objects
created during a current IDLE session (with the same effect as if one
starts an IDLE session). Thanks.
Different than "Shell / Restart Shell (Ctrl+F6)" ?
Of course this doesn't work if you started Idle i
d out the efficiency reason (asking the machine
to do a pile of work that you intend to throw away). But nobody
warned you:
s.rsplit(None, 1)[-1]
would be better in the case of 'single_word'.rsplit(None, 1)
--Scott David Daniels
scott.dani...@acm.org
--
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class__.needs_initial = False
def setUp(self):
if self.needs_initial:
self.initialize()
And write your test classes like:
class Bump(FunkyTestCase):
def initialize(self):
super(Bump, self).initialize()
print 'One time
etdefault = mutating(dict.setdefault)
update = mutating(dict.update)
d = SerializedDictionary(whatever)
Then just use dict.serial to see if there has been a change.
--Scott David Daniels
scott.dani...@acm.org
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lly request
Unicode via __unicode__, if it exists.
Even more fun (until you know what is going on):
>>> c = C()
>>> "%s %s %s" % (c, u'c', c)
u'[str] c [unicode]'
--Scott David Daniels
Scott David dani...@acm.org
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.
The number including denormals and -0.0 is 2 ** 64 - 2 ** 53.
There are approx. 2 ** 53 NaNs (half with the sign bit on).
--Scott David Daniels
scott.dani...@acm.org
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ou make of Mixin and MyMixin inherit from object you get:
CommonBase.method_x(BaseA.18613328, 0, '', '0x0')
BaseA
...
CommonBase.method_x(FooZ.18480592, 7, '---', '0x5b')
MyMixin FooZ
CommonBase.method_x(BarW.18591280, 8, '', '0x68')
BaseA Mixin BarW
...
Note that in the BarW case (with object), not all mixins are called.
--Scott David Daniels
scott.dani...@acm.org
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Button(subframe, text='<',
command=partial(output, c2 + '->' + c1)).pack()
subframe.pack(fill='x', expand=1)
...
Also note from Pep 8, spaces are cheap and make the code easier to read.
--Scott David Daniels
scott.dani...@acm.org
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cifically, by a
NEWLINE token)?
I don't know what your actual requirement is but maybe this fits:
exec("print '%s'" % x)
Lots of fun when preceded by:
x = "'; sys.exit(); print 'b"
or far nastier things. Exec is the same level of dangerous a
print 'FooZ'
>>> FooZ().method_x(1,2,3)
MixinBase
BaseC
Mixin
FooZ
>>> FooY().method_x(1,2,3)
MixinBase
Mixin
>>> FooX().method_x(1,2,3)
MixinBase
BaseA
Mixin
FooX
>>> BaseA().method_x(1,2,3)
MixinBase
BaseA
>>>
--Scott David Daniels
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grams this way, you can get another speedup
for frequently used programs. Create a little program consisting of:
import actual_program
actual_program.main()
Your larger program will only be compiled once, and the dinky one
compiles quickly.
--Scott David Daniels
scott.dani...@acm.org
--
http
may contribute to clutter without adding
much information.
An equality operator would be nice as well (don't bother with
ordering though, you get lost in a twisty maze of definitions
all different).
--Scott David Daniels
scott.dani...@acm.org
--
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n Python we make that, "once __new__ had returned."
--Scott David Daniels
scott.dani...@acm.org
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queue...I thought t.join() would just work.
Why do we need None?
Because your workers aren't finished, they are running trying to get
something more to do out of the queue. The t.join() would cause a
deadlock w/o the None.
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.pyth
os((len(parts) * N, len(parts) * N), dtype=float)
for n, chunk in enumerate(parts):
base = n * 3
result[base : base + 3, base : base + 3] = chunk
--Scott David Daniels
scott.dani...@acm.org
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Piet van Oostrum wrote:
Scott David Daniels (SDD) wrote:
SDD> James Harris wrote:...
Another option:
0.(2:1011), 0.(8:7621), 0.(16:c26b)
where the three characters "0.(" begin the sequence.
Comments? Improvements?
SDD> I did a little interpreter where non-base 10 num
0 (decimal)
.F.100 == 256 (hexadecimal)
.1.100 == 4 (binary)
.3.100 == 9 (trinary)
.Z.100 == 46656 (base 36)
Advantages:
Tokenizer can recognize chunks easily.
Not visually too confusing,
No issue of what base the base indicator is expressed in.
--Scott David Daniels
there is such a spot, it is a major security weakness.
You'd be able to automate password attacks.
--Scott David Daniels
scott.dani...@acm.org
--
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rsion says, "'2.6.2 (r262:71605, ...'" [don't do dots yourself]
To understand more of why we need this on every question, see:
http://www.mikeash.com/getting_answers.html
or google for "smart questions".
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
1.194797383466323, 1.1945367358141823]
>>> timeit.Timer("list(Holder(L))", setup % 16).repeat(number=1000)
[2.4244464031043123, 2.4261885239604482, 2.4050011942858589]
vs straight chain.from_iterable (on my machine):
[0.7828263089303249, 0.79326171343005925, 0.80967664884783019]
[1.499
d make the code harder to read. So, no, unittest does not
require that you code things into foo.py. You will find that you
may bend your coding style within foo.py in order to make it more
testable, but (if you do it right) that should also make the code
clearer.
--Scott David Daniels
scot
wo three four':
if getattr(Base, name) is not getattr(Base, name):
raise NotImplementedError(
'%s implementation missing' % name)
...
--Scott David Daniels
scott.dani...@acm.org
--
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MRAB wrote:
Scott David Daniels wrote:
MRAB wrote:
The shortest I can come up with is:
"[" + "][".join(letters) + "]"
Maybe a golf shot:
"][".join(letters).join("[]")
Even shorter:
"["+"][".join(letters)
explanations:
http://xkcd.com/327/
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
MRAB wrote:
The shortest I can come up with is:
"[" + "][".join(letters) + "]"
Maybe a golf shot:
"][".join(letters).join("[]")
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
e above to:
require(REQUIRE_OFF or s is not None)
//code
ensure(ENSURE_OFF or hasattr(returnValue, '__iter__'))
Python has no good way to turn off argument calculation by
manipulating function definition (at least that I know of).
--Scott David Daniels
scott.dani...@acm.or
ng
the Python code without significantly affecting the the DB work
needed. The "SELECT *" form in the EXIST test is something DB
optimizers look for, so don't fret about wasted data movement.
--Scott David Daniels
scott.dani...@acm.org
--
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flect C's
rules, and I see little excuse for trying to change them now.
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
arn yet another language.
It seems nice to me that you can use a rule that says, "stick to
normal names and you don't have to worry about mucking with the
way Python itself works, but if you are curious, looks for those
things and fiddle with them."
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
ated.
I must learn this "etc." language, I hear it mentioned all the time :-)
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
ong time.
>>> 'a'< 'd' <'z'
True
>>> 'a'< 'D' <'z'
False
--Scott David Daniels
scott.dani...@acm.org
--
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:
digest = hashlib.sha1(self.keypair.as_der()).hexdigest().upper()
return ':'.join(digest[pos : pos+2] for pos in range(0, 40, 2))
--Scott David Daniels
scott.dani...@acm.org
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
e Python adapter to
the database. DO YOU HAVE A RUNNING PostgreSQL server that you can
connect to?
Just to be a bit more explict:
Change file setup.py's line 219 from:
>> except (Warning, w):
to either (OK in Python 2.6 and greater):
except Warning as w:
or (works for Pyt
s but I'm
curious)
I think it explained in the complex math area, but basically EE types
use j, math types use i for exactly the same thing. Since i is so
frequently and index in CS, and there is another strong convention,
why not let the EE types win?
--Scott David Daniels
scott.dani...@acm
a 5-9
b 7-10
c 3-6
d 15-20
e 18-23
'''
source = iter(sample.split('\n')) # source of lines, opened file?
ignored = source.next() # discard heading
for interval in
hon's, does this work?
import random
random.seed(123542552)
I'm not quite sure how you came to believe that Python controls MySQL,
as opposed to using its services.
--Scott David Daniels
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Piet van Oostrum wrote:
Scott David Daniels (SDD) wrote:
SDD> Stephen Cuppett (should have written in this order):
"Fred Atkinson" wrote ...
Is there a pre-defined variable that returns the GET line...
os.environment('QUERY_STRING')
SDD> Maybe you mean:
SDD>
andle the grayscale.
.MNG is pictures only, but that doesn't hurt you in the least.
--Scott David Daniels
scott.dani...@acm.org
--
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'QUERY_STRING')
Maybe you mean:
os.environ['USER']
--Scott David Daniels
scott.dani...@acm.org
--
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The posted regex doesn't work; this might be homework, so
I'll not fix the two problems. The fact that you did not
see the failure weakens your claim of "does so very clearly."
--Scott David Daniels
scott.dani...@acm.org
--
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Piet van Oostrum wrote:
Scott David Daniels (SDD) schreef:
...
SDD> Or even:
SDD> proc = subprocess.Popen(['ls','-la'], stdout=subprocess.PIPE)
SDD> with gzip.open(filename, 'w') as dest:
SDD> for line in iter(proc.stdout, ''
;ls','-la'], stdout=subprocess.PIPE)
with gzip.open(filename, 'w') as dest:
for line in iter(proc.stdout, ''):
f.write(line)
--Scott David Daniels
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following:
C:\> assoc .py=Python26.File
C:\> fumble.py
C:\> assoc .py=Python31.File
C:\> fumble.py
That is the basic idea, but at the moment, I don't see a simple demo
working for me. SO, if you want to pursue this, you can probably get it
to work.
--Scott David Daniels
scott.dani...@acm.org
--
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hence
imagined a woman. I suspect it would come to irk one
almost enough to become a Gabe.
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
ith py24, py25, py26 can be convenient.
By the way, install Python 3.1 rather than 3.0; think of 3.0 as the
alpha of the 3.X branches (it will get no love at all now that 3.1
is out).
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
haracter operations to be running up and down strings
a character at a time, changing here and there. So it becomes more
natural to deal with strings as chunks to pass around, and it is nice
not to have to copy the strings when doing that passing around.
--Scott David Daniels
scott.dani...@acm.org
mport io
sys.stdin = io.TextIOWrapper(sys.stdin.detach(), encoding='utf8')
for line in sys.stdin:
line = line.strip()
if line == '':
#do something here
--Scott David Daniels
scott.dani...@acm.org
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ications of bool(x) is ignored here.
If minimizing side-effects is needed:
def xor(a, b):
if a:
if not b:
return a
elif b:
return b
return False
--Scott David Daniels
scott.dani...@acm.org
--
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you get the duck programming language?
It shares a type system with Python, of course. :-)
--Scott David Daniels
scott.dani...@acm.org
--
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s to a slightly more general machine than the Aho-Corasick processing
requires.
--Scott David Daniels
scott.dani...@acm.org
--
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#;
And mine is one w/o the base 10 bias:
.f.123 == 0x123
.7.123 == 0o123
.1.1101 == 0b1101
That is, ..
-- show the base by showing base-1 in the base.
I actually built this into "OZ," an interpretter.
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailma
then you need
array elements to contain the indices for the children explicitely.
And you loower your locality of reference (cache-friendliness).
Note the insert in Python, for example, is quite cache-friendly.
--Scott David Daniels
scott.dani...@acm.org
--
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ct, it may well be easily
capable of that. If no success, you might contact PJ at Groklaw, she
has dealt with a _lot_ of PDFs (and knows people who deal with PDFs
in bulk).
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
ng to your house for a cup of coffee. :-)
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
n the library. So, take the sources and
edit, but change the module name. Even better is figure out how to
use _socket.pyd, to create a smaller _socketexpmodule.c and use that.
--Scott David Daniels
scott.dani...@acm.org
--
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Scott David Daniels wrote:
Raymond Hettinger wrote:
[Scott David Daniels]
def most_frequent(arr, N): ...
In Py2.4 and later, see heapq.nlargest().
I should have remembered this one
In Py3.1, see collections.Counter(data).most_common(n)
This one is from Py3.2, I think.
Oops -- egg all
Raymond Hettinger wrote:
[Scott David Daniels]
def most_frequent(arr, N): ...
In Py2.4 and later, see heapq.nlargest().
I should have remembered this one
In Py3.1, see collections.Counter(data).most_common(n)
This one is from Py3.2, I think.
--Scott David Daniels
scott.dani...@acm.org
Steven D'Aprano wrote:
On Fri, 10 Jul 2009 08:28:29 -0700, Scott David Daniels wrote:
Steven D'Aprano wrote:
Even *soup stock* fits the same profile as what Hendrik claims is
almost unique to programming. On its own, soup stock is totally
useless. But you make it, now, so you can y
3
class MyClass(object):
__metaclass__ = MyType
a = 5
print MyClass.a, MyClass.demo
--Scott David Daniels
scott.dani...@acm.org
--
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needs (and he uses color to distinguish
version-to-version changes).
http://rgruet.free.fr/
Sadly, I no longer work there, so my copy is gone. :-(
--Scott David Daniels
scott.dani...@acm.org
--
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nwind = []
try:
self.a = Foo('a')
unwind.append(a)
self.b = Foo('b', fail=True)
unwind.append(b)
...
except Exception, why:
while unwind):
unwind.pop().close()
urn powers
if num < limit:
if num > 1:
# if you really want the factors then append((num, 1))
powers.append(2)
return powers
OK, that's a straightforward speedup, _but_:
factorize(6) == [2, 2] == factorize(10) == fa
Peter Otten wrote:
Scott David Daniels wrote:
Scott David Daniels wrote:
t = timeit.Timer('sum(part[:-1]==part[1:])',
'from __main__ import part')
What happens if you calculate the sum in numpy? Try
t = timeit.Timer('
holds led to making better nails.
--Scott David Daniels
scott.dani...@acm.org
--
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("don't repeat yourself") as a maxim, let
it go the first time and wait until you see the pattern (a possible
function). I'd go with a function first, a pair of functions, and
only then look to abstracting the function.
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
Scott David Daniels wrote:
... Here's a heuristic replacement for my previous frequency code:
I've tried to mark where you could fudge numbers if the run time
is at all close.
Boy, I cannot let go. I did a bit of a test checking for cost to
calculated number of discovered samples,
mclovin wrote:
On Jul 4, 12:51 pm, Scott David Daniels wrote:
mclovin wrote:
OK then. I will try some of the strategies here but I guess things
arent looking too good. I need to run this over a dataset that someone
pickled. I need to run this 480,000 times so you can see my
frustration. So it
7;), which is more information than
you are providing.
How about:
...
if x >= 0: raise ValueError('x = %r not allowed (negative)?' % x)
...
--Scott David Daniels
scott.dani...@acm.org
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flattened[stride::stride]) == 1000
So there are only 1000 points to investigate.
With any distribution other than uniform, that should go _way_ down.
So just pull out those points, use bisect to get their frequencies, and
feed those results into the heap accumulation.
--Scott David Daniels
--
http:
Dave Angel wrote:
Scott David Daniels wrote:
Patrick Sabin wrote:
Horace Blegg schrieb:
You might consider using a VM with 'save-points'. You run the
program (in a debugger/ida/what have you) to a certain point
(logical point would be if/ifelse/else statements, etc) and save the
return sorted(heap, reverse=True) # put most frequent first.
--Scott David Daniels
scott.dani...@acm.org
--
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Patrick Sabin wrote:
Horace Blegg schrieb:
You might consider using a VM with 'save-points'. You run the program
(in a debugger/ida/what have you) to a certain point (logical point
would be if/ifelse/else statements, etc) and save the VM state. Once
you've saved, you continue. If you find the
upwestdon wrote:
if not (self.higher and self.lower):
return self.higher or self.lower
self.lower = 0
self.higher = 123
???
More than just None is False
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, 10, 12, 14, 16, 18, 20, 22, 24,
26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48]
3: [3, 9, 15, 21, 27, 33, 39, 45]
5: [5, 25, 35]
7: [7, 49]
--Scott David Daniels
scott.dani...@acm.org
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list=%r, xlist=%r",
rlist, wlist, xlist)
if rlist:
text_read = f_read.readline() # get a line
DPRINT("after read/readline text_read:%r, len=%s",
text_read, len(text_read))
if text_read: # there were some bytes
text_lines += text_read
DPRINT("text_lines:%r", text_lines)
continue # Got some chars, keep going.
break # Nothing new found, let's get out.
return text_lines or None
--Scott David Daniels
scott.dani...@acm.org
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http://mail.python.org/mailman/listinfo/python-list
omparisons:
if ( is not None
and is not None
and is not None):
...
--Scott David Daniels
scott.dani...@acm.org
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print 'Access denied: attempt %s of %s' % (attempt+1, MAXRETRY)
else:
# The else for a for statement is not executed for breaks,
# So indicates the end of testing without a match
raise SystemExit # Or whatever you'd rather do.
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
in your bag
of tricks:
def convert(in_queue, out_queue):
for row in iter(in_queue.get, None):
# ... convert row
out_queue.put(converted_line)
--Scott David Daniels
scott.dani...@acm.org
--
http://mail.python.org/mailman/listinfo/python-list
> Mitchell L Model wrote:
Sorry, after looking over some other responses, I went back and re-read
your reply. I'm just making sure here, but:
> Scott David Daniels wrote:
Below compressed for readability in comparison:
class A:
def __init__(self): super().__init__(
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