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Commits on Nov 3, 2011

• Remove astar row from compare_graph_searchers table because it's sensitive to trivial changes. Needs real tests instead.

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Commits on Oct 29, 2011

• Moved random_weighted_selection to utils and rewrote it using bisect.

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• Fixed search bug reported by Matthew Yurka, and others:

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Commits on Oct 28, 2011

• Don't compare strings with 'is not'. (Broke things in pypy.) Also show Struct members in sorted order so doctests work in pypy.

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Commits on Oct 26, 2011

• More s/##/#/ for consistency.

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• s/##/#/ so I can debug with Halp.

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• s/successor/child/

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• Fixed node.solution() to skip the root node.

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• In print_table() don't print trailing whitespace.

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Commits on Oct 23, 2011

• Changed NotImplemented to something that actually complains. Lack of this bit me.

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• Code tweak to '== None'

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• Stripped trailing whitespace.

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Commits on Oct 17, 2011

• Provisionally dropping support for Python 2.4. Changed some loops to use any() and all().

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• Stopped subclassing Agent just for the sake of defining an agent program.

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Commits on Oct 11, 2011

• search.py converted to 3rd edition.

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• Started converting to 3rd edition. agents.py converted plus a little extra cleanup.

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Commits on Oct 10, 2011

• Agent.__init__ now takes a program parameter. A few more nonlocal-state-variable problems found and fixed. One agent program rewritten as a callable instance since it uses both state variables and …

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• Moved agent-program definition back into the constructors to get rid of all the copying between parameters, instance vars, and nonlocals. Fixed nonlocal state-var bug in ReflexAgentWithState.

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Commits on Oct 8, 2011

• Some genetic_search() fixes: states were lists but had .mutate() called on them; pmut was probability of *not* mutating; initial population nonrandom; bad fitness function.

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• Break ties at random in hill_climbing.

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Commits on Oct 7, 2011

• Fixed path() to follow its doc comment (first-to-last order).

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• Note remaining problems with SimpleProblemSolvingAgent.

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• Fixed bug: nonlocals assigned as locals.

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• More agent-program cleanup, and incorporated fix from AIMA3e pseudocode.

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• Minor cleanup.

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Commits on Oct 5, 2011

• Cleanup in search.py.

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• Trivial reformatting.

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Commits on Oct 4, 2011

• Removed distracting comment.

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Commits on Sep 27, 2011

• Fixed local-search algorithms. Could be prettier but should work now for the first time.

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Commits on Sep 15, 2011

• expand(node, problem) was wrong.

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• Fixed Wordlist bugs: hi must be int, and list may be empty.

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Commits on Sep 2, 2011

• Brought recursive_best_first_search closer to the pseudocode.

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• Got recursive_best_first_search running. Significantly messier-looking.

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• Corrected comment.

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Commits on Sep 1, 2011

• Restored recursive_dls() to following Fig. 3.17.

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