rself.
--Scott David Daniels
[EMAIL PROTECTED]
--
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m.groups())
You can avoid problems w/ possible 0s or 0.0s or .. by using:
(str(c) or "NULL") for c in groups())
the "or" (or a similar "and" trick) will continue to work. The
different "empty" or "nothing" values of
shows courtesy.
Few people mind explaining unclear documentation when the confusing part
is identified (and they know the answer). Similarly, asking (5000?, a
million?) to each spend a second so you can save an hour is bad economics.
--Scott David Daniels
[EMAIL PROTECTED]
--
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color='red')
You can even use your arg dictionaries in transitional code:
call_dict = {'value': 23, 'age': 6, 'scale': 2.5, 'metrics': 2,
'validity': 'strong', 'color': 'red'}
f(**call_dict)
--Scott David Daniels
[EMAIL PROTECTED]
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return [head]
# Perhaps result = [''] here to an indicate ends-in-sep
head, tail = os.path.split(head)
while head and tail:
result.append(tail)
head, tail = os.path.split(head)
result.append(head or t
[EMAIL PROTECTED] wrote:
> On 20 juin, 21:44, eliben <[EMAIL PROTECTED]> wrote:
...
>> The generic version has to make a lot of decisions at runtime, based
>> on the format specification.
>> Extract the offset from the spec, extract the length.
... ...
> Just my 2 cents. Truth is that as long as i
a tease; I think it would take pages to
address the issue in a comprehensible way for someone who hasn't
thought about the issues. If you are curious enough to pursue it,
image some issues, design experiments, and see if you can ask a
coherent question; if not, "YAGNI" (You Aint Gon
nized:
if :
yield block, where, recognized
else:
yield block, where, 0
--Scott David Daniels
[EMAIL PROTECTED]
--
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solve your problem, why avoid trying it simply because
it might not do so?
Sorry, this a long form of "read smart questions," but it did include
some suggestions about how you could find the problem in your particular
case.
--Scott David Daniels
[EMAIL PROTECTED]
--
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;t plan to
have more than several thousand at any one time). Lists (for that
matter most Python builtin types) get used a lot, so they have that
built in.
You can observe that even on the most trivial extensions:
class AttributableInt(int): pass
class AttributeFreeInt(int): __slots__ =
...
_remote('some_tax')
_remote('other', 'frogs')
...
* The pythonic "enough motive" is how redundant your "__init__.py"
looks. The "DRY" (Don't Repeat Yourself) principle comes into effect.
The more your so
s how to use it to avoid redundant comutation:
_next_entry = _Fibonacci_gen().next
_sofar = []
def fib(n):
while len(_sofar) <= n:
_sofar.append(_next_entry())
return _sofar[n]
--Scott David Daniels
[EMAIL PROTECTED]
--
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tion(s) slowed down, much as C performance
would suffer is access to RAM slowed down.
--Scott David Daniels
[EMAIL PROTECTED]
--
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"seems like it
is a simple job."
Beware of customers who know something will take little effort
without being able to characterize that effort.
--Scott David Daniels
[EMAIL PROTECTED]
--
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t_string) <= set('LMR')
--Scott David Daniels
[EMAIL PROTECTED]
--
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ent to had an LGP-30, and I learned to program on it.
Rumor had it that a student from two years before me used to work late
in the lab, and allow the janitors to play blackjack, and it is further
rumored that he made a bit of money leaning on the transfer control
button.
--Scott David Daniels
bytes that have issues are 10 and 13.
--Scott David Daniels
[EMAIL PROTECTED]
--
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e __init__ method, if
available
To elaborate a bit on Fredrik's response, there is a sense in which
Python has constructors, but, to the extent it does, a constructor is
the __new__, __init__ pair. For immutables, everything happens in
__new__, for mutables, most things happen in the __init__
with fortran or
bash, but i'm learning python), that the reason why i tried to use numpy.
Look into the csv module (comma separated values). It also can deal
with tab separated values.
--Scott David Daniels
[EMAIL PROTECTED]
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Alan Franzoni wrote:
Michael Torrie was kind enough to say:
Of course any time you send coherent numbers over the network, I highly
recommend you use what's called network byte order I'm sure python
has some convention in the struct module for dealing with this.
Not in the struct module;
those results together. This is a place to apply human intellect, not
machine effort. So, sorry, there is no way to solve the problem without
understanding the field it occurs in and the question being addressed
by the code.
--Scott David Daniels
[EMAIL PROTECTED]
--
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is in an honorable way?
As the author of several of those recipes, I definitely expect others
to use them. I'd hate to slow them up by requiring them to ask
permission, but would appreciate an acknowledgment.
-Scott David Daniels
[EMAIL PROTECTED]
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Those details matter. If you are doing wxPython programming, for
example, you cannot easily use IDLE for your program (GUI systems
fight for control of the display).
-Scott David Daniels
[EMAIL PROTECTED]
--
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built this code in order to teach intro physics: they thought
that (and continue to teach classes as if) it was _easier_ to
teach Python and the physics than to teach physics alone!
-Scott David Daniels
[EMAIL PROTECTED]
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you have the minimal solution
in the set you've chosen.
I actually did a cheapest-first search; adding an edge each time.
There is a post-join pruning step that was (as I recall) fairly simple.
-Scott David Daniels
[EMAIL PROTECTED]
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; In the end, it's all a matter of convenience, I guess.
Nope: If you change the code in-place, the whole stack's references
to where they were running would need to get updated to corresponding
locations in the new code. _That_ is a lot of work.
--Scott David Daniels
[EMAIL PROTECTED]
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Soren wrote:
> Hi,
>
> I'd like to read the filenames in a directory, but not the
> subdirectories, os.listdir() gives me everything... how do I separate
> the directory names from the filenames? Is there another way of doing
> this?
>
> Thanks!
import os
base, files, dirs = iter(os.wa
bdsatish wrote:
> The built-in function round( ) will always "round up", that is 1.5 is
> rounded to 2.0 and 2.5 is rounded to 3.0.
>
> If I want to round to the nearest even, that is
>
> my_round(1.5) = 2# As expected
> my_round(2.5) = 2# Not 3, which is an odd num
>
> I'm inter
):
> if not keyword: keyword = self.default
> return "A %s in time saves nine." % (keyword)
Several things are false (for example: '', 0, False, [], ...)
If you can get along with the code you have suggested, I'd
think about using:
def franklin(self, keyword):
return
message, change that last line to:
try:
return random.choice(lessons)
except IndexError:
print "Unable to find lessons of type %s." % type
raise
-Scott David Daniels
[EMAIL PROTECTED]
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appens as if it were happening at its own
moment in time -- tou don't worry about other transactions
interleaved with your transaction.
* Durability:
Once a transaction actually makes it into the database, it stays
there and doesn't magically fail a l
sions are
included, with the differences color-coded. You can reassure yourself
that the vast majority of the language remains the same.
--Scott David Daniels
[EMAIL PROTECTED]
--
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whatever name you need
Diez
...
Or, you can even more simply do:
text = '''
def f(state):
print state
return True
'''
lcl = {}
exec text in globals(), lcl
and lcl will be a dictionary with a single item: {'f' : }
tagging:
<http://code.google.com/p/django-tagging/>
It easily allows configuration of different image sizes and integrates with
generic templates providing gallery and detail view support.
HTH
Scott
--
http://mail.python.org/mailman/listinfo/python-list
ly, I've loved most hours
I've spent on Knuth -- I'd hate to deprve anyone of that experience.
-Scott David Daniels
[EMAIL PROTECTED]
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can write, and
then speed it up when it needs it.
I'd use len(bg) above unless my code was littered with calls to
len of the same thing, in which case it might it might be clearer
to choose a good name for len(bg).
--Scott David Daniels
[EMAIL PROTECTED]
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he Idle you get with this "corrupts" more easily, since the "-n" says
"no subprocess." Things like restarting the shell don't work. _But_
Tkinter stuff is available (there is already a running mainloop). You
can interactively do simple things a step at a time and watch the
results. It is a _great_ way to experiment with Tkinter.
--Scott David Daniels
[EMAIL PROTECTED]
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Paul Scott wrote:
... example:
if os.path.exists(os.path.join(basedir,picdir)) == True :
blah blah
Question is, is there a better way of doing this? The above *works* but
it looks kinda hackish...
You've had the joining addressed elsewhere, but note that:
if os.path.e
erator.next()
...
--Scott David Daniels
[EMAIL PROTECTED]
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hon 2.4.
Can anyone help me implement this timeout functionality.
Obviously, get a copy of 2.5 and back-port the poplib code as
poplib25 or some such. If you want more help than that, hire
someone to do it.
--Scott David Daniels
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ments "smells" as bad as one with a single
element, just in a different way.
--Scott David Daniels
[EMAIL PROTECTED]
--
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Right-click the shortcut and select the "properties" menu.
On the "General" tab of the Properties window:
Give the shortcut a nicer name (I use Idle25-n for mine).
On the "Shortcut" tab of the properties window, add a space and a -n
to the target li
I suspect the problem is with
the back slash.
A standard windows error. note that '\t' is a tab, and I doubt you have
a directory named . Get in the habit of _always_ using:
junkfile = open(r'c:\tmp\junkpythonfile','w')
or
junkfile = open('c:\\tmp\
comparison to get the behavior you seem to want?
--Scott David Daniels
[EMAIL PROTECTED]
--
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er receptor, close at same level
out_file = open(OUTPUT % receptor, 'a')
for line in range(10):
for ligand in (7, 9, 11, 13, 15, 17):
extract_dist(out_file, receptor, line, ligand)
out_file.close()
--Scott David Daniels
[EMAIL PROTECTED]
--
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sequence). What you want is:
list(x for x in range(10) if 2 < x < 5)
Note that:
list(itertools.dropwhile(lambda x: x<5, range(10)+range(10)))
is [5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
not [5, 6, 7, 8, 9, 5, 6, 7, 8, 9].
--Scott David Daniels
Scott.Daniels.Acm.Org
--
http:
lead = []
print list(started([0, 0, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9]))
--Scott David Daniels
[EMAIL PROTECTED]
--
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-1]] * int(value[: -1])
If this is really SI units, you likely are doing real measurements,
so I'd consider using "float" instead of "int" in the above.
--Scott David Daniels
[EMAIL PROTECTED]
--
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_AUTOSIZE))
idx = self.GetNextItem(idx, wx.LIST_NEXT_ALL, wx.LIST_STATE_DONTCARE)
Any help would be greatly appreciated! I do have Shrubbery!
Scott
Scott E. Desmond
Director & Manager Equity Systems Development
IT Integration Lead
Mellon Capital Management Corporation
500 Grant Street, Suite
other error, but not the one you want.
--Scott David Daniels
[EMAIL PROTECTED]
--
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ld be greatly appreciated!
Scott E. Desmond
Director & Manager Equity Systems Development
IT Integration Lead
Mellon Capital Management Corporation
500 Grant Street, Suite 4200
Pittsburgh, PA 15258
T 412.236.0405 | F 412.236.1703
[EMAIL PROTECTED] | www.mcm.com
The information contained in th
? ...
How about file.tell == 0? or have I misunderstood the requirement?
OI thought roughly the same thing when I saw this,
how about
if not file.tell():
--Scott David Daniels
[EMAIL PROTECTED]
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nking Python cannot handle calculation itself easily.
Where you'll need to leave python is in array and matrix calculations,
there the numpy code will get you near custom C/fortran code speeds.
--Scott David Daniels
[EMAIL PROTECTED]
--
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]
--Scott David Daniels
[EMAIL PROTECTED]
--
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.
And you can accomplish this as a "clicky" by renaming your program from
"someprog.py" to "someprog.pyw".
--Scott David Daniels
[EMAIL PROTECTED]
--
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1.0)[1]
def high_bit(value):
'''Find the highest order bit of a positive integer <= maxfloat'''
assert value > 0
return math.frexp(value)[1] - EXP_OF_ONE
--Scott David Daniels
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--
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else:
return complex(class_, x, y)
Which will produce instances of complex.
--Scott David Daniels
[EMAIL PROTECTED]
--
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Scott David Daniels wrote:
> Schüle Daniel wrote:
>> ...
And, of course, I reply with a cutto-pasto (pre-success code).
> ...
> Which will produce instances of Complex, or:
> class Complex(complex):
> def __new__(class_, x, y=0.0, polar=False):
&
* sin(angle))
--Scott David Daniels
[EMAIL PROTECTED]
--
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d = dict([(i, eval(p % (i, i))) for i in range(20, 30)])
Strive to be clear first, terse second given the first is still
achieved.
--Scott David Daniels
[EMAIL PROTECTED]
--
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ems can be found in C++ as well, but I never
hunted very hard.
--Scott David Daniels
[EMAIL PROTECTED]
--
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ve'
Also shows me élève.
With cmd.exe (the command line):
c:\ python
>>> print u'\xe9l\xe8ve'
shows me élève, but I can't type in:
>>> print u'lve'
is what I get when I paste in the print u'élève' (beeps during paste).
What do you get if
[EMAIL PROTECTED] wrote:
>> nested and hided inside a class.
>
> Hidden, sorry :-)
>
>
>> Can a "sub-function" be called directly from outside the defining function?
No, and each call to scramble_text defines a new function "scramble".
Further, there
better, cleaner, or easier way to get at the
> element in a list AND the index of a loop than this?
for elementIndex, myElement in enumerate(elementList):
print "myElement ", myElement, " at index: ",elementIndex
--Scott David Daniels
[EMAIL PROTECTED]
--
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4: NoFoundry, 5:OnlyProcess, 6:OnlyVendor, 7: Nothing}
def dispatch(f, p, v):
return behavior[((f is None) * 2 + (p is None)) * 2
+ (v is None)](f, p, v)
...
dispatch('Intel', 'Silicon', None)
--Scott David Daniels
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http://cheeseshop.python.org
http://larch.python.org
and http://spam.python.org
all get to the same page.
--Scott David Daniels
[EMAIL PROTECTED]
--
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for a line, but sends
a CR ('\r' == '\15' == ASCII 13), which the I/O systems somewhere
magically transforms into a LF ('\n' == '\12' == ASCII 10).
The C standard (which evolved with Unix) does these translation
"for you" (or "to you"
hen you are designing
"mixin" classes you can easily choose names that should not collide
with the instance variable names of classes using your "mixin" classes.
> I have plenty of docs and stuff, now I'm just looking for wisdom. As a
> seasoned Python user, what do y
you pass up.
--Scott David Daniels
[EMAIL PROTECTED]
--
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"__main__"):
> i1 = Item("one")
> i2 = Item("two")
> i3 = Item("three")
>
> p1 = Parent([i1, i2])
> p2 = Parent([i3])
>
> print str(p1)
>
>
Now you get the output you expect.
By-the-by, why shouldn't the first class be simply?:
class Item(object)
def __init__(self, text=""):
self.text = text
Finally, defining __repr__ rather than __str__ will make it
easier to fiddle with your code interactively w/o keeping anything
from working.
--Scott David Daniels
[EMAIL PROTECTED]
--
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l size and creation date, differing
> apparently only in name (python, python2.4 and python24.exe) and each of
> exactly 2,597,888 bytes. What possible purpose could be served by such
> triplication that couldn't more efficiently be done by other means?
You obviously know what and where Py
;
> Every help is greatly appreciated.
>
> Thanks
>
If you don't mind spending (not so much) money, ActiveState's Komodo
is a nice debugger. With it you can even debug a Python program on
a remote machine over a network connection (ideal for GUI problems).
(limit):
for i in xrange(limit):
yield i * 7 - 4 > 100
any(generates(8))
True
any(generates(8))
False
--Scott David Daniels
[EMAIL PROTECTED]
--
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[EMAIL PROTECTED] wrote:
> Scott David Daniels wrote:
>> [EMAIL PROTECTED] wrote:
>>> ... Is the Python debugger fairly stable?
>> Yes, but it is not massively featured. The "Pythonic" way is to
>> rarely use a debugger (test first and straightforwa
0)),
(('B', 'A'), dict(A=35, B=25, C=40)),
(('B', 'B'), dict(A=49, B=48, C=3)),
(('B', 'C'), dict(A=60, B=20, C=20)),
_all_states = set(key)
-- key is a order-tuple of states.
--Scott David Daniels
[EMAIL PROTECTED]
--
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Duncan Booth wrote:
> Oh well, just wait until Python 2.5 comes out and we get people complaining
> about the order of the new if statement.
Or rather, the order of the new if _expression_.
--Scott David Daniels
[EMAIL PROTECTED]
--
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ow that?), not picking a
particular character.
print >> htmlFile, (u'') % (1,)
And if you don't mean to be writing unicode, you could use:
print >> htmlFile, ('') % (1,)
--Scott David Daniels
[EMAIL PROTECTED]
--
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use pieces of OS X may actually use
the internal Python 2.3.
--Scott David Daniels
[EMAIL PROTECTED]
--
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ut how they do it and their priorities are about
zero to one.
Kind of like the core developers saying, rather than getting more
users of this language, I'd prefer they submit careful bug reports
with money attached to fix the bugs -- ain't gonna happen.
--Scott David Daniels
[EMAIL PRO
eople used to the
original optional chord pad, so I find the Apple "users can't count
past one" attitude strange. With the chord pad and three-button mouse,
you could fill in forms without touching the keyboard.
http://www.cedmagic.com/history/first-computer-mouse.html
--
nger any legal way
to get a VC 6.0 compiler. This round at least is sticking with the same
compiler as Python 2.4 (VC 7.0).
The new 2005 compiler flags much of the Python source with complaints
about perfectly legal ANSI C constructs, and a "clean build" is a strong
preference of the PyD
Roy Smith wrote:
> In article <[EMAIL PROTECTED]>,
> Scott David Daniels <[EMAIL PROTECTED]> wrote:
>
>> Roy Smith wrote:
>>> I never understood why people switch mouse buttons. I'm left handed, so I
>>> put the mouse on the left side of my k
27; % line
if not line.strip():
break
chunk = sys.stdin.read(23) # reads a series of bytes from sys.stdin
Warning: idle does not implement line iteration as in the for loop.
Also the read in both line iteration and .read(N) may well read the
input in "block mode&quo
Gregory Petrosyan wrote:
> P.P.S. are there any experiments with compiling CPython with Intel's
> compiler?
Yup, the (older) Intel compiler was quite effective for 2,2 and 2.3
(at least), and I think at least one distro was built with it.
--
-Scott David Daniels
[EMAIL PROTECTE
ther. It also helps that
you mention what pyExcelerator is good at.
--
-Scott David Daniels
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--
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if want_a_B1(*args, **kwargs):
return B1(*args, **kwargs)
elif want_a_B2(*args, **kwargs):
return B2(*args, **kwargs)
return super(B1, class_).__new__(class_, *args, **kwargs)
--Scott David Daniels
[EMAIL PROTECTED]
--
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Felipe Almeida Lessa wrote:
> Em Dom, 2006-03-19 às 08:54 -0800, Scott David Daniels escreveu:
>> class A(object):
>> def __new__(class_, *args, **kwargs):
>> if class_ is A:
>> if want_a_B1(*args, **kwargs):
>>
[EMAIL PROTECTED] wrote:
>
> You can also see a preview here:
> http://www.doxdesk.com/img/software/py/icons.png
Maybe you could change the ink color to better distinguish
the pycon and pyc icons.
--
-Scott David Daniels
[EMAIL PROTECTED]
--
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u told
us how you tried to answer the question for yourself.
So, anyhow, thanks for taking the time to write your question properly.
--
-Scott David Daniels
[EMAIL PROTECTED]
--
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er/faster/cleaner way to achieve this ?
To update, I'd either go with that or Felipe's list comprehension.
If you just want the value of the result, how about:
doubled = dict((key, [x * 2 for x in values])
for key, values in d.iteritems())
--
-Scott David
f two's complement notation):
v & -v == isolated least significant bit of v
math.log(v & -v, 2) == bit number of least significant bit.
--Scott David Daniels
[EMAIL PROTECTED]
--
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has convinced me that programs are defined in print, not
structures.
--Scott David Daniels
[EMAIL PROTECTED]
--
http://mail.python.org/mailman/listinfo/python-list
gely',))
print eg, getattr(*ref_attr), getattr(*ref_other)
But you might consider this:
class Another(Example):
""" Test primary Key assignment """
key = ('one', 'two')
def getkey(v):
return [getattr(v, part) for part in v.key]
if __name__ == "__main__":
eg2 = Another(3.1415, 3+4j, 'pi')
print eg2, getkey(eg2)
eg2.one = 'First PK Elem'
print eg2, getkey(eg2)
setattr(eg2, 'two', u'Strangely')
print eg2, getkey(eg2)
--
-Scott David Daniels
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)
except FloatingPointError:
print 'never reached'
print 'This is not reached either'
except ValueError:
print 'proper exception'
raw_input('Pause and reflect:')
--Scott David Daniels
[EMAIL PROTECTED]
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," a judgment quite reasonable in a legal system based on
trusted authorities, but not a good one in a society "ruled by laws
and not men."
--Scott David Daniels
[EMAIL PROTECTED]
--
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s a persistent store, without the normal SQL feature of "our DB
admin can tune this up to fly like a peregrine in full stoop." A
query planner for well-insulated objects just doesn't have enough
information about what it can and cannot rewrite, so it doesn't know
how to e
>
> E-mail me if you want the module, I don't think I have it currently online
> anywhere.
This sounds like a great recipe for the cookbook:
http://aspn.activestate.com/ASPN/Cookbook/Python
--
-Scott David Daniels
[EMAIL PROTECTED]
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http://mail.python.org/mailman/listinfo/python-list
rsion, try:
def mangle(digits):
length = (len(digits) + 1) >> 1
v = int(digits, 16)
mask = int('0F' * length, 16)
smunch = (v ^ (v >> 4)) & mask
swapped = v ^ (smunch | (smunch << 4))
return ''.
racting away the meaningful
structure. The database structures built are as good a DB organization
as code generated by code generation programs: the meaning is obscured,
and the generated (structure / code) is hard to work with.
--Scott David Daniels
[EMAIL PROTECTED]
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