pubeval is now a C-extension to Python
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9
bot.py
9
bot.py
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@ -6,6 +6,7 @@ from board import Board
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import subprocess
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import random
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import sys
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import pubeval
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class Bot:
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@ -51,13 +52,7 @@ class Bot:
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# TODO: Test this, the score results should be deterministic
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def make_pubeval_move(self, board, sym, roll):
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legal_moves = Board.calculate_legal_states(tuple(board), sym, roll)
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moves_and_scores = []
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for board in legal_moves:
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call_argument = ["./pubeval/pubeval"]
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for x in Board.board_features_to_pubeval(board, sym):
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call_argument.append(str(x))
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data = subprocess.check_output(call_argument)
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moves_and_scores.append([board, float(bytes.decode(data))])
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moves_and_scores = [(board, pubeval.eval(board)) for board in legal_moves]
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scores = [ x[1] for x in moves_and_scores ]
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best_move_pair = moves_and_scores[np.array(scores).argmax()]
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return best_move_pair
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82
pubeval.py
82
pubeval.py
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@ -1,82 +0,0 @@
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class Pubeval:
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def __init__(self):
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self.x = []
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self.wc = [
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0.25696, -0.66937, -1.66135, -2.02487, -2.53398, -0.16092, -1.11725, -1.06654,
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-0.92830, -1.99558, -1.10388, -0.80802, 0.09856, -0.62086, -1.27999, -0.59220,
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-0.73667, 0.89032, -0.38933, -1.59847, -1.50197, -0.60966, 1.56166, -0.47389,
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-1.80390, -0.83425, -0.97741, -1.41371, 0.24500, 0.10970, -1.36476, -1.05572,
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1.15420, 0.11069, -0.38319, -0.74816, -0.59244, 0.81116, -0.39511, 0.11424,
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-0.73169, -0.56074, 1.09792, 0.15977, 0.13786, -1.18435, -0.43363, 1.06169,
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-0.21329, 0.04798, -0.94373, -0.22982, 1.22737, -0.13099, -0.06295, -0.75882,
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-0.13658, 1.78389, 0.30416, 0.36797, -0.69851, 0.13003, 1.23070, 0.40868,
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-0.21081, -0.64073, 0.31061, 1.59554, 0.65718, 0.25429, -0.80789, 0.08240,
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1.78964, 0.54304, 0.41174, -1.06161, 0.07851, 2.01451, 0.49786, 0.91936,
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-0.90750, 0.05941, 1.83120, 0.58722, 1.28777, -0.83711, -0.33248, 2.64983,
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0.52698, 0.82132, -0.58897, -1.18223, 3.35809, 0.62017, 0.57353, -0.07276,
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-0.36214, 4.37655, 0.45481, 0.21746, 0.10504, -0.61977, 3.54001, 0.04612,
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-0.18108, 0.63211, -0.87046, 2.47673, -0.48016, -1.27157, 0.86505, -1.11342,
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1.24612, -0.82385, -2.77082, 1.23606, -1.59529, 0.10438, -1.30206, -4.11520,
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5.62596, -2.75800
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]
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self.wr = [
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0.00000, -0.17160, 0.27010, 0.29906, -0.08471, 0.00000, -1.40375, -1.05121,
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0.07217, -0.01351, 0.00000, -1.29506, -2.16183, 0.13246, -1.03508, 0.00000,
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-2.29847, -2.34631, 0.17253, 0.08302, 0.00000, -1.27266, -2.87401, -0.07456,
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-0.34240, 0.00000, -1.34640, -2.46556, -0.13022, -0.01591, 0.00000, 0.27448,
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0.60015, 0.48302, 0.25236, 0.00000, 0.39521, 0.68178, 0.05281, 0.09266,
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0.00000, 0.24855, -0.06844, -0.37646, 0.05685, 0.00000, 0.17405, 0.00430,
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0.74427, 0.00576, 0.00000, 0.12392, 0.31202, -0.91035, -0.16270, 0.00000,
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0.01418, -0.10839, -0.02781, -0.88035, 0.00000, 1.07274, 2.00366, 1.16242,
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0.22520, 0.00000, 0.85631, 1.06349, 1.49549, 0.18966, 0.00000, 0.37183,
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-0.50352, -0.14818, 0.12039, 0.00000, 0.13681, 0.13978, 1.11245, -0.12707,
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0.00000, -0.22082, 0.20178, -0.06285, -0.52728, 0.00000, -0.13597, -0.19412,
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-0.09308, -1.26062, 0.00000, 3.05454, 5.16874, 1.50680, 5.35000, 0.00000,
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2.19605, 3.85390, 0.88296, 2.30052, 0.00000, 0.92321, 1.08744, -0.11696,
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-0.78560, 0.00000, -0.09795, -0.83050, -1.09167, -4.94251, 0.00000, -1.00316,
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-3.66465, -2.56906, -9.67677, 0.00000, -2.77982, -7.26713, -3.40177,-12.32252,
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0.00000, 3.42040
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]
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def setx(self,pos):
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self.x = [0]*122
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for j in range(1,25):
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jm1 = j-1
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n = pos[25-j]
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if n != 0:
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if n == -1:
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self.x[5*jm1+0] = 1.0
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if n == 1:
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self.x[5*jm1+1] = 1.0
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if n >= 2:
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self.x[5*jm1+2] = 1.0
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if n == 3:
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self.x[5*jm1+3] = 1.0
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if n >= 4:
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self.x[5*jm1+4] = (n-3)/2.0
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self.x[120] = -(pos[0]/2.0)
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self.x[121] = (pos[26]/15.0)
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def pubeval(self, race, pos):
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if pos[26] == 15:
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return 99999999.0
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self.setx(pos)
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score = 0.0
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if race:
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for i in range(122):
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score = score + self.wr[i]*self.x[i]
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else:
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for i in range(122):
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score = score + self.wc[i]*self.x[i]
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return score
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@ -1,5 +1,4 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <Python.h>
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static float x[122];
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@ -41,9 +40,33 @@ static const float wr[122] = {
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0.00000, 3.42040
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};
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void setx(int pos[])
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{
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/* sets input vector x[] given board position pos[] */
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extern float x[];
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int j, jm1, n;
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/* initialize */
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for(j=0;j<122;++j) x[j] = 0.0;
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float pubeval(race,pos)
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int race,pos[];
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/* first encode board locations 24-1 */
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for(j=1;j<=24;++j) {
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jm1 = j - 1;
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n = pos[25-j];
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if(n!=0) {
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if(n==-1) x[5*jm1+0] = 1.0;
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if(n==1) x[5*jm1+1] = 1.0;
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if(n>=2) x[5*jm1+2] = 1.0;
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if(n==3) x[5*jm1+3] = 1.0;
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if(n>=4) x[5*jm1+4] = (float)(n-3)/2.0;
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}
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}
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/* encode opponent barmen */
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x[120] = -(float)(pos[0])/2.0;
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/* encode computer's menoff */
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x[121] = (float)(pos[26])/15.0;
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}
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float pubeval(int race, int pos[])
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{
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/* Backgammon move-selection evaluation function
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for benchmark comparisons. Computes a linear
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@ -101,45 +124,51 @@ int race,pos[];
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return(score);
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}
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setx(pos)
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int pos[];
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static PyObject*
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pubeval_eval(PyObject *self, PyObject *args) {
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long numValues;
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int board[28];
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float eval_score;
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PyObject* tuple_obj;
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PyObject* val_obj;
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PyObject* return_obj;
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if (! PyArg_ParseTuple(args, "O!", &PyTuple_Type, &tuple_obj))
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return NULL;
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numValues = PyTuple_Size(tuple_obj);
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if (numValues < 0) return NULL;
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// Iterate over tuple to retreive positions
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for (int i=0; i<numValues; i++) {
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val_obj = PyTuple_GetItem(tuple_obj, i);
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board[i] = PyLong_AsLong(val_obj);
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}
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eval_score = pubeval(0, board);
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return_obj = Py_BuildValue("f", eval_score);
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return return_obj;
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}
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static PyMethodDef pubeval_methods[] = {
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{
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/* sets input vector x[] given board position pos[] */
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extern float x[];
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int j, jm1, n;
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/* initialize */
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for(j=0;j<122;++j) x[j] = 0.0;
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"eval", pubeval_eval, METH_VARARGS,
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"Returns evaluation results for the given board position."
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},
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{NULL, NULL, 0, NULL}
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};
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/* first encode board locations 24-1 */
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for(j=1;j<=24;++j) {
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jm1 = j - 1;
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n = pos[25-j];
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if(n!=0) {
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if(n==-1) x[5*jm1+0] = 1.0;
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if(n==1) x[5*jm1+1] = 1.0;
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if(n>=2) x[5*jm1+2] = 1.0;
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if(n==3) x[5*jm1+3] = 1.0;
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if(n>=4) x[5*jm1+4] = (float)(n-3)/2.0;
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}
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}
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/* encode opponent barmen */
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x[120] = -(float)(pos[0])/2.0;
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/* encode computer's menoff */
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x[121] = (float)(pos[26])/15.0;
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}
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int main(int argc, char**argv) {
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int test[28]; //= {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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int i = 0;
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char *ptr;
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for (i=1; i<argc; i++) {
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// printf("%s\n", argv[i]);
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test[i-1] = (int) strtol(argv[i], &ptr, 10);
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}
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printf("%f\n", pubeval(0, test));
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return 0;
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static struct PyModuleDef pubeval_definition = {
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PyModuleDef_HEAD_INIT,
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"pubeval",
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"A Python module that implements Gerald Tesauro's pubeval function for evaluation backgammon positions.",
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-1,
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pubeval_methods
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};
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PyMODINIT_FUNC PyInit_pubeval(void) {
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//Py_Initialize();
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return PyModule_Create(&pubeval_definition);
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}
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9
pubeval/setup.py
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9
pubeval/setup.py
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@ -0,0 +1,9 @@
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from distutils.core import setup, Extension
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pubeval = Extension('pubeval',
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sources = ['pubeval.c'])
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setup (name = 'pubeval',
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version = '0.1',
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description = 'Pubeval for Python',
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ext_modules = [pubeval])
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