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Created on 2010-01-18 22:07 by jab, last changed 2022-04-11 14:56 by admin. This issue is now closed.
| Messages (5) | |||
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| msg98034 - (view) | Author: Joshua Bronson (jab) * | Date: 2010-01-18 22:07 | |
Though the heapq module does not support changing the priority of a particular element of the heap (a necessary operation for the A* search family of algorithms), such an element can be marked as invalid and a new element can be added with different priority. Any element marked as invalid that makes it to the top of the heap can simply be popped off and ignored. Users who haven't seen this trick before might mistakenly think the heapq module does not provide sufficient operations to implement A* search. Please see the recent thread on comp.lang.python for more background: http://groups.google.com/group/comp.lang.python/browse_frm/thread/8adc3ce8d2219647 |
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| msg98035 - (view) | Author: Eric V. Smith (eric.smith) *  |
Date: 2010-01-18 22:17 | |
Assigning to Raymond, per his request in the c.l.p. thread. |
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| msg113226 - (view) | Author: Raymond Hettinger (rhettinger) * |
Date: 2010-08-08 01:17 | |
Applied in r83793 Thanks for the suggestion. |
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| msg113712 - (view) | Author: Joshua Bronson (jab) * | Date: 2010-08-12 22:09 | |
Thanks for the great additions. |
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| msg113718 - (view) | Author: Raymond Hettinger (rhettinger) * |
Date: 2010-08-12 22:57 | |
You're welcome :-) |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:56:56 | admin | set | github: 51983 |
| 2010-08-12 22:57:26 | rhettinger | set | messages: + msg113718 |
| 2010-08-12 22:09:04 | jab | set | messages: + msg113712 |
| 2010-08-08 01:17:32 | rhettinger | set | status: open -> closed resolution: accepted messages: + msg113226 |
| 2010-01-18 22:17:35 | eric.smith | set | assignee: georg.brandl -> rhettinger messages: + msg98035 nosy: + eric.smith |
| 2010-01-18 22:07:46 | jab | create | |