for fn in filenames:
for line in open(fn):
if line[0] in digits:
ProcessLine(line)
break
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I won't say more, since Alex Martelli already pointed out that Google is
doing big things with Python and it seems to scale well for them.
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43:58)
[GCC 4.0.3 (Ubuntu 4.0.3-1ubuntu5)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
As you can see, I'm running Python 2.4.3. Make sure you aren't running an
old version of Python, and that cod
On Wed, 03 May 2006 17:51:03 +, Edward Elliott wrote:
> Steve R. Hastings wrote:
>> You could also use a function that counts all different values in a list,
>> reducing the list to a dictionary whose keys are the unique values from
>> the list.
>
> Wouldn'
ip()
xc = m.group(3).replace(s_space, s_empty)
s = pat_sc.sub(s_empty, s, 1)
m = pat_lt.search(s)
if m:
lt = m.group(1)
lt = lt.strip()
s = pat_lt_remove.sub(s_empty, s, 1)
tup = (before, title, xc, lt)
lst.append(tup)
for before, title, xc, lt in lst:
he server, part of
what the conversation includes will be to whom you wish to send the email.
Please Google for information on SMTP. You can also start here:
http://en.wikipedia.org/wiki/SMTP
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hain()".
newlist = Chain(mylist, sort, uniq, list)
I did kind of want a way to make a "reusable pipe". If you come up with a
useful chain, it might be nice if you could use it again with convenient
syntax. Maybe like so:
sort_u = [sort, uniq, list]
newlist = Chain(mylist, sort_u)
Thank you very much for making a helpful suggestion!
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g
left over is assumed to be the LT.
Now, we have all the data; it's easy enough to rearrange it.
We can convert the XC string into a list of page ranges just by calling
.split(";"), which will split on semicolons. Loop over this list,
printing each time, and there you go.
I'
mp.lang.python; I
called my version of it tally().
d = tally(bool(x) for x in seq)
print d[True] # prints how many true values in seq
print d[False] # prints how many false values in seq
tally() is in my iterwrap.py module, which you can get here:
http://home.blarg.net/~steveha/iterwrap.tar.gz
love to find them.
If you are using email, then as I said above, your email client should
have an SMTP server filled in already, and you are already using it every
time you send email. So I suggest you use that.
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On Tue, 02 May 2006 12:58:14 -0700, Roger Miller wrote:
> Steve R. Hastings wrote:
>
>> a = 0
>> b = 0
>> a is b # always true
>
> Is this guaranteed by the Python specification, or is it an artifact of
> the current implementation?
I believe it's an
On Tue, 02 May 2006 21:20:48 +0200, Boris Borcic wrote:
> Steve R. Hastings wrote:
>> So, don't test to see if something is equal to True or False:
>>
>> if 0 == False:
>> pass # never executed; False and 0 do not directly compare
>
> of course they
mostly with generator expressions:
any(v for v in seq if v) # true if any v evaluates true
all(v for v in seq if v) # true if *all* v evalute true
Or a better example:
any(is_green(x) for x in lst) # true if any value in list is green
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d it:
if bool(0) == False:
pass # always executed
Do this:
if not 0:
pass # always executed
if 1:
pass # always executed
To convert a random value into a boolean value, you could use either
"bool()" or you could use "not not":
a = not not 0
b = bool(0)
&
e a special method __set__
called when an expression is being assigned somewhere; that would make
this trivial.
What is the friendliest and most Pythonic way to write a Pipe class for
iterwrap?
P.S. I have experimented with overloading the | operator to allow this
syntax:
newlist = Pipe(mylist)
Nope, out of the question for Python 2.x. Note that the the builtin
> range could be rebound, or a global range could appear in the module,
> at run time.
Ah! Of course.
Thank you very much for explaining this.
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On Thu, 06 Apr 2006 02:33:16 +0200, Azolex wrote:
> Don't. It's quite funny, thanks.
I guess I should laugh. :-/
When you read my original articles, did *you* think I was proposing that
range() be changed to always return an iterator? I thought what I wrote
was pretty clear..
the Holy Grail_. I was trying to be funny, not
sarcastic, bitter, etc.
Thank you for your patience and I am done with this thread, unless I have
written something unclear in *this* post and I have to post another post
to clarify it as well. :-(
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d not mean to suggest that for would
simply call iter() when you use "for i in range".
I apologize if my writing was unclear.
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#x27;m mistaken here, but I don't see how this optimization could
possibly break anything. range() makes a list, and for consumes it, and
the list isn't seen anywhere else. If the Python compiler took this:
for i in range(10**6):
pass
and produced code equivalent to this:
like this one. I want to be cool too. Where can I find
information about how to get a bytecodes listing for my compiled Python?
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one" instead of "== None".
Actually, I do like your version. And I try to always use "is None"
instead of "== None"; today I made a mistake about it. Thank you for your
comments.
Ideally there should be an official tally() function in some module in
Pyt
On Sat, 01 Apr 2006 00:38:08 -0800, Steve R. Hastings wrote:
> my proposed truecount() returns a tuple, with the length and
> the count of true values.
I never liked the name truecount(), and the more I think about it, the
less I like the function. It should either solve a very importan
a tuple with two values, one pass is
enough.
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e the key= option. The need isn't as strong as with
.sort(), min(), and max(), but consistency can be a good thing. I'd
personally like to see key= anywhere it makes sense.
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ly write your own truecount() but it would be nice to have
something like that as standard. I don't much like the name "truecount"
though; I'm open to suggestions for a better name.
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I'm happy any() and all() will be built in, but I don't know
that there is sufficient need for truecount() or anything similar. If you
need it, just write it.
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Thank you very much for explaining this. And so thoroughly!
Of course I withdraw all objections. :-)
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False
for x in S:
ret_val = True
if not x:
return False
return ret_val
Comments?
P.S. I searched with Google, and with Google Groups, trying to find
anyplace this might have been discussed before. Apologies if this has
already been discussed and I missed it somehow.
if cmp(maxval, v) <= 0:
maxval = v
return maxval
raise TypeError, "seq must be a list or an iterator"
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t;lst" it
is.
I would have put the "cmp" argument second, and made it default to the
built-in Python "cmp" function if not specified. Oh, well.
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ur
version.
P.S. I benchmarked your version; it ran in 22.0 seconds, just a gnat's
whisker faster than the iter() version.
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l
This is from Google's "goopy" package.
http://goog-goopy.sourceforge.net/
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ecause I just wanted a streamlined
simple example.
I had a nagging feeling that I was missing something simple, and you have
put your finger on it. That's perfect! It's simple, it's clear, and it
will work on any version of Python. Thanks!
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ter than
complex, so I don't think I'd ever actually use it.
The clear winner was the iterator version. It was much faster than the
others, and in my opinion it is simpler and easier to understand than any
of the others.
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.py", line 1148, in direct
raise ValueError, "value must be a valid timestamp string"
ValueError: value must be a valid timestamp string
>>> item.pub_date = "01 Jan 2006 08:01:23 GMT"
>>> print item.pub_date.text
Sun, 01 Jan 2006 00:01:23 -0800
>>> pr
tp://example.org/2003/12/13/atom03";)
entry.links.append(link)
s = str(xmldoc)
if s_example != s:
failed_tests += 1
print "test case failed:"
print "The generated XML doesn't match the example. diff follows:"
print diff(s_example
I suggest you should build your list using a list comprehension:
>>>a = [[0]*3 for i in range(3)]
>>>a
[[0, 0, 0], [0, 0, 0], [0, 0, 0]]
>>>a[0][1] = 1
[[0, 1, 0], [0, 0, 0], [0, 0, 0]]
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s a safe way to
create a list of three 0 values.
When you have a list that contains three references to the same mutable,
and you change the mutable, you get the results you discovered.
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I have edited PyAtom, and now it should be in better conformance with the
PEP 8 guidelines. It is available from the same place as before:
http://www.blarg.net/~steveha/pyatom.tar.gz
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. Now that it's done I
want to share it, but I didn't study PEP 8 very much before I started it.
Thank you for the feedback.
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in the Python core.
I said I intend to donate it to PSF. I didn't say they would do anything
with it... :-) That's up to them, of course.
> Good job :)
Thank you.
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Atom questions and comments:
[EMAIL PROTECTED]
P.S. Should I publish this to the Cheese Shop?
http://cheeseshop.python.org/
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orted to ASCII for porting code to
platforms that don't allow Unicode Python files? Yes: just replace the
Unicode character with a symbol like __op__, where op is the operator.
Actually, that's a better syntax than the one I proposed, too:
__+__
# __add__ # this one's alread
w.python.org/peps/pep-0225.html
Alas, the links to the discussion about this don't work. But it is
possible to use the Google Groups archive of comp.lang.python to read some
of the discussion.
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I actually have made a sensible suggestion, or else people will now
explain why this idea isn't good (and I'll learn something). Either way,
I look forward to your comments.
References:
Elementwise/Objectwise Operators
http://www.python.org/peps/pep-0225.html
Adding A New Outer Product
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