Mailman 3 January 2008 - Python-Dev

Organization of ABC modules
by Raymond Hettinger Jan. 26, 2008

Jan. 26, 2008

All of the abstract base classes should be collected in one place. I propose that the modules be collected into a package so that we can write: import abc.numbers import abc.collections . . . Besides collecting all the relevant code in one place, it has a nice additional benefit of clearly designating when you're working with one of the provided abstract base classes. When I see "import numbers", I don't immediately recognize this as being somehow different from "import math" or … [View More]

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Re: [Python-Dev] trunc()
by Raymond Hettinger Jan. 26, 2008

Jan. 26, 2008

[GvR] > Does no-one thinks it means round(f) either? Heck no. The int() and round() functions have been in Lotus and Excel for an eternity and nobody has a problem learning what those functions do. Also, the extra argument for round(f, n) makes it clear that it can return other floats rounded to n-digits. I've taught a lot of classes to spreadsheet users and have observed that people get it right away. Raymond

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Re: [Python-Dev] trunc()
by Raymond Hettinger Jan. 26, 2008

Jan. 26, 2008

>.some pocket calculators have an INT function, defined > as floor(x) when x is positive and ceil(x) when x is negative That's the mathematical definition. The way they explain it is dirt simple: return the integer portion of a number. Some of the calculators that have int() also have frac() which has the obvious interpretation. Raymond

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Summary of Tracker Issues
by Tracker Jan. 26, 2008

Jan. 26, 2008

ACTIVITY SUMMARY (01/18/08 - 01/25/08) Tracker at http://bugs.python.org/ To view or respond to any of the issues listed below, click on the issue number. Do NOT respond to this message. 1668 open (+31) / 12132 closed (+22) / 13800 total (+53) Open issues with patches: 421 Average duration of open issues: 769 days. Median duration of open issues: 1030 days. Open Issues Breakdown open 1646 (+29) pending 22 ( +2) Issues Created Or Reopened (55) _______________________________ '… [View More]

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Float --> Integer Ratio
by Raymond Hettinger Jan. 25, 2008

Jan. 25, 2008

rational.py contains code for turning a float into an exact integer ratio. I've needed something like this in other situations as well. The output is more convenient than the mantissa/exponent pair returned by math.frexp(). I propose C-coding this function and either putting it in the math module or making it a method for floats. That would simplify and speed-up rational.py while making the tool available for other applications. Also, the tool is currently in the wrong place (while the … [View More]

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Is anyone porting PyNumber_ToBase to trunk?
by Eric Smith Jan. 25, 2008

Jan. 25, 2008

In 3.0, the code to implement long.__format__() calls PyNumber_ToBase to do the heavy lifting. If someone is planning on implementing PyNumber_ToBase in 2.6, I'll wait for them to do so. If not, I guess I'll either do it myself, or hack around it. Is this on anyone's To Do list? I don't see it on Brett's spreadsheet at http://spreadsheets.google.com/pub?key=pCKY4oaXnT81FrGo3ShGHGg

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trunc()
by Raymond Hettinger Jan. 25, 2008

Jan. 25, 2008

>> Can anyone explain to me why we need both trunc() and int()? > trunc() has well-defined semantics -- it takes a Real instance > and converts it to an Integer instance using round-towards-zero > semantics. Since something similar is happening to math.ceil and math.floor, I'm curious why trunc() ended-up in builtins instead of the math module. Doesn't it make sense to collect similar functions with similar signatures in the same place? Raymond

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Re: [Python-Dev] rfc822_escape doing the right thing?
by stephen emslie Jan. 24, 2008

Jan. 24, 2008

I have created issue #1923 to keep track of this. Stephen Emslie On Jan 23, 2008 6:00 PM, Gregory P. Smith <greg(a)krypto.org> wrote: > could you put this on bugs.python.org and follow up with a reference to the > issue # for better tracking? > > > > On 1/23/08, stephen emslie <stephenemslie(a)gmail.com> wrote: > > > > > > > > I've been working on a project that renders PKG-INFO metadata in a > > number of ways. I have noticed that … [View More]

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struct module docs vs reality
by Gregory P. Smith Jan. 24, 2008

Jan. 24, 2008

The documentation for the struct module says: http://docs.python.org/dev/library/struct.html#module-struct "short is 2 bytes; int and long are 4 bytes; long long (__int64 on Windows) is 8 bytes" and lists 'l' and 'L' as the pack code for a C long. As its implemented today, the documentation is incorrect. On an LP64 host (pretty much any 64-bit linux, bsd or unixish thing) a long is 8 bytes. I assume this means there is existing code out there that expects the current not-as-documented … [View More]

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REMINDER: OSCON 2008 Call for Proposals
by Aahz Jan. 24, 2008

Jan. 24, 2008

The O'Reilly Open Source Convention (OSCON) is accepting proposals for tutorials and presentations. The submission period ends Feb 4. OSCON 2008 will be in Portland, Oregon July 21-25. For more information and to submit a proposal, see http://conferences.oreilly.com/oscon/ -- Aahz (aahz(a)pythoncraft.com) <*> http://www.pythoncraft.com/ "All problems in computer science can be solved by another level of indirection." --Butler Lampson

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