Message 106431 - Python tracker

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Author	mark.dickinson
Recipients	mark.dickinson
Date	2010-05-25.12:55:57
SpamBayes Score	3.9621624e-05
Marked as misclassified	No
Message-id	<[email protected]>
In-reply-to

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.

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
2010-05-25 12:56:02	mark.dickinson	set	recipients: + mark.dickinson
2010-05-25 12:56:02	mark.dickinson	set	messageid: <[email protected]>
2010-05-25 12:56:00	mark.dickinson	link	issue8817 messages
2010-05-25 12:56:00	mark.dickinson	create