Is there any discussion of having real booleans
in Python 3000? Say something along the line
of the numpy implementation for arrays of type 'bool'?
Hoping the bool type will be fixed will be fixed,
Alan Isaac
57  3401 
Alan Isaac wrote:
Is there any discussion of having real booleans
in Python 3000?
I'm not sure how the bools we have now are not "real."
Say something along the line of the numpy implementation for arrays
of type 'bool'?
What aspect of this do you want? A bool typecode for the stdlib array
module?
I can guess a number of things that you might mean, but it would be best
if you explained with an example of what current behavior is and what
you would like it to be.
--
Michael Hoffman
Peter Otten wrote:
The last I have seen is
http://mail.python.org/pipermail/pyt...ry/005284.html
OK. Thanks.
Do you care to explain what is broken?
I suppose one either finds coercion of arithmetic operations to int
to be odd/broken or does not. But that's all I meant.
My preference would be for the arithmetic operations *,+,-
to be given the standard interpretation for a two element
boolean algebra: http://en.wikipedia.org/wiki/Two-ele...oolean_algebra
In contrast with the link above,
it does not bother me that arithmetic with ints and bools
produces ints.
Cheers,
Alan Isaac
Alan G Isaac wrote:
Do you care to explain what is broken?
I suppose one either finds coercion of arithmetic operations to int
to be odd/broken or does not. But that's all I meant.
My preference would be for the arithmetic operations *,+,-
to be given the standard interpretation for a two element
boolean algebra:
http://en.wikipedia.org/wiki/Two-ele...oolean_algebra
If I understand this right, the biggest difference from the current
implementation would be that::
True + True == True
instead of:
True + True == 2
What's the advantage of that? Could you give some use cases where that
would be more useful than the current behavior?
It's much easier to explain to newcomers that *, + and - work on True
and False as if they were 1 and 0 than it is to introduce them to a two
element boolean algebra. So making this kind of change needs a pretty
strong motivation from real-world code.
Steve
> Do you care to explain what is broken?
> My preference would be for the arithmetic operations *,+,-
to be given the standard interpretation for a two element
boolean algebra:
http://en.wikipedia.org/wiki/Two-ele...oolean_algebra
If I understand this right, the biggest difference from the current
implementation would be that::
True + True == True
instead of:
True + True == 2
What's the advantage of that? Could you give some use cases where that
would be more useful than the current behavior?
I prefer the use of 'and' and 'or', and they feel more pythonic than & and
+
--
Using Opera's revolutionary e-mail client: http://www.opera.com/mail/
Alan Isaac wrote:
Hoping the bool type will be fixed will be fixed,
Is there any type named "bool" in standard Python?
Regards,
Björn
--
BOFH excuse #207:
We are currently trying a new concept of using a live mouse.
Unfortunately, one has yet to survive being hooked up to the
computer.....pl ease bear with us.
Alan G Isaac wrote:
My preference would be for the arithmetic operations *,+,-
to be given the standard interpretation for a two element
boolean algebra:
http://en.wikipedia.org/wiki/Two-ele...oolean_algebra
>>[bool(True+True) , bool(True+False )]
[True, True]
Works for me, or did I misunderstand you?
If you don't want explicitly to write bool, you could define your
own True and False classes.
Regards,
Björn
--
BOFH excuse #184:
loop found in loop in redundant loopback
"Alan Isaac" <ai****@america n.eduwrote in message
news:z0Oki.1782 $YH3.1751@trndd c08...
| Is there any discussion of having real booleans
| in Python 3000? Say something along the line
| of the numpy implementation for arrays of type 'bool'?
As far as I know, there is no such discussion among the developers.
Clp is always a different matter ;-)
Michael Hoffman <ca*******@mh39 1.invalidwrites :
Alan Isaac wrote:
Is there any discussion of having real booleans
in Python 3000?
I'm not sure how the bools we have now are not "real."
I'm guessing that Alan is referring (at least in part) to this behaviour:
Python 2.4.4 (#2, Apr 5 2007, 20:11:18)
[...]
>>True == 1
True
>>False == 0
True
Whereas a real bool type would have discrete values for True and False
that would not be equal to any other.
--
\ "I guess we were all guilty, in a way. We all shot him, we all |
`\ skinned him, and we all got a complimentary bumper sticker that |
_o__) said, 'I helped skin Bob.'" -- Jack Handey |
Ben Finney This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
by: beliavsky |
last post by:
I just came across the slides for Guido van Rossum's "Python Regrets"
talk, given in 2002. It worries me that much of my Python code would
be broken if all of his ideas were implemented. He doesn't even like
'print'. Of course, I am not qualified to argue with Van Rossum about
the direction of Python.
When is Python "3000" expected to appear? Is there a list of expected
incompatibilities with Python 2.3? Are serious Python programmers...
|
by: Steven Bethard |
last post by:
So, as I understand it, in Python 3000, zip will basically be replaced
with izip, meaning that instead of returning a list, it will return an
iterator. This is great for situations like:
zip(*)
where I want to receive tuples of (item1, item2, item3) from the
iterables. But it doesn't work well for a situation like:
zip(*tuple_iter)
|
by: seb.haase |
last post by:
Hi,
Is it true that that "Python 3000" is dead ?
Honestly I think that e.g. changing 5/2 to be 2.5 (instead of 2) would
just break to much code :-(
On the otherhand I'm using Python as "Matlab replacement" and would
generally like 5/2 ==2.5
So, I was contemplating to default all my modules/scripts to start with
"from __future__ import division"
but if it is never coming (in this decade, that is) then it would be a
|
by: John Salerno |
last post by:
Is 'Python 3000' just a code name for version 3.0, or will it really be
called that when it's released?
|
by: jantod |
last post by:
I think there might be something wrong with the implementation of
modulus.
Negative float values close to 0.0 break the identity "0 <= abs(a % b)
< abs(b)".
print 0.0 % 2.0 # => 0.0
print -1e-010 % 2.0 # =>1.9999999999
which is correct, but:
| | |
by: beliavsky |
last post by:
At http://www-03.ibm.com/developerworks/blogs/page/davidmertz David
Mertz writes
"Presumably with 2.7 (and later 2.x versions), there will be a means of
warning developers of constructs that are likely to cause porting
issues . In the simplest case, this will include
deprecated functions and syntax constructs. But presumably the warnings
may cover "potential problems" like the above example."
The current beta version of Python is 2.5...
|
by: Petr Prikryl |
last post by:
Do you think that the following could became PEP (pre PEP).
Please, read it, comment it, reformulate it,...
Abstract
Introduction of the mechanism for language extensions via
modules written using other languages. Extensions of
Python could be done via special interpreter extensions.
From Python sources, the special modules would look like
other modules, with the Python API (the key feature from
|
by: Guido van Rossum |
last post by:
python-list@python.org]
The first Python 3000 release is out -- Python 3.0a1. Be the first one
on your block to download it!
http://python.org/download/releases/3.0/
Excerpts:
Python 3000 (a.k.a. "Py3k", and released as Python 3.0) is a new
|
by: GD |
last post by:
Please remove ability to multiple inheritance in Python 3000.
Multiple inheritance is bad for design, rarely used and contains many
problems for usual users.
Every program can be designed only with single inheritance.
I also published this request at http://bugs.python.org/issue2667
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
| | |
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| | |
by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
| |
