comp.lang.python Google Group

Re: My own accounting python euler problem

2009-11-08T07:27:43Z

As mentioned in the other answers, your problem is best solved by a long
overdue organisational decision instead of a technical one.
Most popular solutions are:
- All invoices are essential a single credit amount, money coming in is
taken of from the big pile.
- Invoices are split by date, creating multiple credit amounts, any

Re: Most efficient way to "pre-grow" a list?

2009-11-08T07:07:25Z

Depends on what you take as given. You can do it with ctypes more
efficiently, but you can also shoot yourself in the foot.
Another possibility is to use a numpy array.

Re: is None or == None ?

2009-11-08T06:27:27Z

* Hrvoje Niksic:
A normal tag field, as illustrated in code earlier in the thread.
Cheers & hth.,
- Alf

Re: Cancelling a python thread (revisited...)

2009-11-08T05:14:33Z

While outright thread cancellation is generally unsafe, it would
be useful if there was a way to force another thread to unblock from
a wait condition, like a blocking read, with an exception. This is,
among other things, why control-C won't terminate some threaded programs.
Python 2.6 and 3 have some steps in this direction. There's

Re: How to parse HTTP time header?

2009-11-08T04:19:11Z

Sorry, my mistake -- 2616 != 2822. I'm not sure if there's something
in the standard library for parsing RFC 2616 dates.
When I faced the problem of parsing HTTP dates, I wrote my own
function although this was in an application that was deliberately
unforgiving of invalid input and therefore my code makes no allowances

Re: How to parse HTTP time header?

2009-11-08T03:48:28Z

The parsedate() function in the rfc822 module does this and claims to
be tolerant of slightly malformed dates, but that module is deprecated
as of Python 2.5 in favor of the email module which hopefully has an
equivalent function.
HTH
Philip

Re: Cancelling a python thread (revisited...)

2009-11-08T03:27:52Z

It doesn't sound like the thread is communicating with the process
much. Therefore:
1. Run the C code in a separate process, or
2. Create the thread from a C extension, maybe even straight from
ctypes, and kill it from C or ctypes.
Arguing that there are good reasons to allow killing threads isn't
going to get you very far. The language developers already know

Re: An assessment of Tkinter and IDLE

2009-11-08T02:57:26Z

More on canvas widget...
The Canvas widget should return objects and not simple tags/ids for
canvas items *OR* at least allow for me to add attributes to the
canvasitems "obj". I find that the id/tag system --while quite simple
and strait forward-- can really leave you with both hands tied behind
you back whilst suffering a wicked itch on the tip of your nose that

Cancelling a python thread (revisited...)

2009-11-08T02:04:04Z

Hi,
the Python threading module does not seem to provide a means to cancel
a running thread. There are many discussions on the web dealing with
this issue and many solutions are offered, but none of them seems to
be applicable to my situation, which is as follows:
I have a C library which does some very computationally intensive

Re: PyQt processEvents not processing

2009-11-08T02:16:50Z

As per your suggestion I added a timer to the init part and now the
update works as expected , even without calls to processEvents.
self.myTimer = QtCore.QTimer(self)
QtCore.QObject.connect(self.my Timer,QtCore.SIGNAL("timeout() "),
self.doUpdate)
self.timerTime = 0
self.myTimer.start(2000)
Thanks
Db

Re: Web development with Python 3.1

2009-11-08T02:08:22Z

Thanks for those links Mario - I'll check them out asap..
Regards,
Alan

Re: is None or == None ?

2009-11-08T01:25:42Z

I'm not sure I understand this. How would you implement tagged integers
without encoding type information in bits of the pointer value?

Re: How convert string '1e7' to an integer?

2009-11-08T02:05:22Z

Bah...so narrow-minded ;-)
>>> print '\n'.join("Base %i: %i" % (base, int('1e7',
base=base)) for base in range(15,37))
Base 15: 442
Base 16: 487
Base 17: 534
Base 18: 583
Base 19: 634
Base 20: 687
Base 21: 742
Base 22: 799
Base 23: 858
Base 24: 919
Base 25: 982
Base 26: 1047
Base 27: 1114
Base 28: 1183

Re: How convert string '1e7' to an integer?

2009-11-08T01:55:08Z

1e7 is a way to express a float in science and math. Try float("1e7")
Christian

Re: How convert string '1e7' to an integer?

2009-11-08T01:52:37Z

Whenever you use that notation, you always get a float
10000000.0
So to convert '1e7' to a number, you need to use float('1e7') which
you can then convert to an int
10000000