473,406 Members | 2,549 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,406 software developers and data experts.

Float to int conversions (was: int(float(sys.maxint)) buglet)

<Sorry for the disconnected reply -I've been having news server issues, and just
switched to the mailing list instead>

A quick check of the source code reveals that this behaviour is deliberate.
There is apparently an issue with the corner case breaking badly (potentially
raising an exception) on some platforms. So, Python plays it safe and converts
the two boundary cases to Python longs instead of Python ints.

See the code for the gory details (the relevant function is 'float_int'):
http://cvs.sourceforge.net/viewcvs.p...34&view=markup

Cheers,
Nick.

--
Nick Coghlan | nc******@email.com | Brisbane, Australia
---------------------------------------------------------------
http://boredomandlaziness.skystorm.net
Jul 18 '05 #1
0 1178

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

0
by: Bengt Richter | last post by:
Peculiar boundary cases: >>> 2.0**31-1.0 2147483647.0 >>> int(2147483647.0) 2147483647L >>> int(2147483647L ) 2147483647 >>> >>> -2.0**31
6
by: Bengt Richter | last post by:
Peculiar boundary cases: >>> 2.0**31-1.0 2147483647.0 >>> int(2147483647.0) 2147483647L >>> int(2147483647L ) 2147483647 >>> >>> -2.0**31
6
by: asmirnov1234567890 | last post by:
Hi my python 2.3.4 for windows refuse to execute line float("NaN"). It says: >>> float("NaN") Traceback (most recent call last): File "<stdin>", line 1, in ? ValueError: invalid literal for...
16
by: Wolfgang Meier | last post by:
Hi, Although it might seem like I am firing out random posts in quick succession this matter is indeed one I thought about for quite some time without coming to a conclusion: Why is it that...
96
by: John Harrison | last post by:
I knew that unsigned integral data types were the cause of scads of mostly spurious warning messages, but I didn't realise that they were a security risk too (see here...
11
by: Greenhorn | last post by:
Hi, K&R says that "floating point constants contain a decimal point (123.4) or an exponent (1e-2) or both; their type is double; unless suffixed. The suffixes f or F indicate a float constant; l...
13
by: Michele Guidolin | last post by:
Hello to everybody. I'm doing some benchmark about a red black Gauss Seidel algorithm with 2 dimensional grid of different size and type, I have some strange result when I change the computation...
2
by: Mathias Picker | last post by:
While trying to install the roundup issue tracking system I discovered the following - faulty - behaviour: My fresh postgres 7.4.2 install on a FreeBSD 5.2-CURRENT machine replies "ERROR: ...
16
by: Enekajmer | last post by:
Hi, 1 int main() 2 { 3 float a = 17.5; 4 printf("%d\n", a); 5 printf("%d\n", *(int *)&a); 6 return 0; 7 }
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
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...
0
jinu1996
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...
0
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...
0
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
0
agi2029
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,...
0
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.