Message 106431 - Python tracker

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In-reply-to
Author	mark.dickinson
Recipients	mark.dickinson
Date	2010年05月25日.12:55:57
SpamBayes Score	3.9621624e-05
Marked as misclassified	No
Message-id	<1274792162.57.0.293855829379.issue8817@psf.upfronthosting.co.za>

Content
The implementation of 'round' for Python integers uses a round-to-nearest form of divmod: a, b -> q, r, where q is the nearest integer to a / b and r = a - b*q. This form of divmod would be useful elsewhere. In particular, it's currently needed for implementing multiplication and division of timedeltas by a float: see issue 1289118 . This patch exposes the operation to Python C code as _PyLong_Divmod_Near, and refactors long_round to use this operation.

Content

The implementation of 'round' for Python integers uses a round-to-nearest form of divmod: a, b -> q, r, where q is the nearest integer to a / b and r = a - b*q.
This form of divmod would be useful elsewhere. In particular, it's currently needed for implementing multiplication and division of timedeltas by a float: see issue 1289118 .
This patch exposes the operation to Python C code as _PyLong_Divmod_Near, and refactors long_round to use this operation.

History
Date	User	Action	Args
2010年05月25日 12:56:02	mark.dickinson	set	recipients: + mark.dickinson
2010年05月25日 12:56:02	mark.dickinson	set	messageid: <1274792162.57.0.293855829379.issue8817@psf.upfronthosting.co.za>
2010年05月25日 12:56:00	mark.dickinson	link	issue8817 messages
2010年05月25日 12:56:00	mark.dickinson	create

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