From 03de67dc103c2557265d42f6e5b5d5b94375dd61 Mon Sep 17 00:00:00 2001
From: Florian Jung <flo@windfisch.org>
Date: Sat, 6 Feb 2016 17:42:53 +0100
Subject: use keras. meh

---
 sol.py | 54 ++++++++++++++++++++++++++++--------------------------
 1 file changed, 28 insertions(+), 26 deletions(-)

diff --git a/sol.py b/sol.py
index c4d8458..ac3c35c 100644
--- a/sol.py
+++ b/sol.py
@@ -2,7 +2,10 @@ import random
 from itertools import product
 from collections import defaultdict
 from sys import argv
-from fann2 import libfann
+import keras
+from keras.models import Sequential
+from keras.layers.core import Dense, Dropout, Activation
+import numpy as np
 
 maze = [ [0, 0, 0, 0, 0, 0, 0],
          [0, 0, 1, 0, 0, 0, 0],
@@ -288,30 +291,27 @@ class QNN (QCommon):
         num_output = 4
         learning_rate = 0.7
 
-        self.NN = libfann.neural_net()
-        #self.NN.set_training_algorithm(libfann.TRAIN_BATCH)
-        #self.NN.set_training_algorithm(libfann.TRAIN_RPROP)
-        #self.NN.set_training_algorithm(libfann.TRAIN_QUICKPROP)
-        self.NN.create_sparse_array(connection_rate, (num_input,)+hidden+(num_output,))
-        self.NN.randomize_weights(-1,1)
-        self.NN.set_learning_rate(learning_rate)
-        self.NN.set_activation_function_hidden(libfann.SIGMOID_SYMMETRIC_STEPWISE)
-        self.NN.set_activation_function_output(libfann.SIGMOID_SYMMETRIC_STEPWISE)
-        #self.NN.set_activation_function_output(libfann.LINEAR)
+        self.NN = keras.models.Sequential()
+        self.NN.add(keras.layers.core.Dense(50, input_dim=num_input, init='glorot_normal', activation='tanh'))
+        self.NN.add(keras.layers.core.Dense(4, init='glorot_normal', activation='tanh'))
+
+        print("compiling model")
+        self.NN.compile(optimizer='sgd', loss='mse')
+        print("done")
     
     def eval(self,x,y = None):
         #print ("eval "+str(x)+", "+str(y))
         if y==None: x,y = x
 
-        #print ("self.NN.run("+str([x/7.,y/5.])+")")
-        return self.NN.run([x/7.,y/5.])
+        return self.NN.predict(np.array([[x/7.,y/5.]]))[0].tolist()
     
     def change(self, s, action, diff):
-        oldval = self.eval(s)
-        newval = list(oldval) # copy list
-        newval[action] += diff
+        UNSUPPORTED
+        #oldval = self.eval(s)
+        #newval = list(oldval) # copy list
+        #newval[action] += diff
 
-        self.NN.train([s[0]/7.,s[1]/5.], newval)
+        #self.NN.train([s[0]/7.,s[1]/5.], newval)
 
     # learn a transition "from oldstate by action into newstate with reward `reward`"
     # this does not necessarily mean that the action is instantly trained into the function 
@@ -319,12 +319,13 @@ class QNN (QCommon):
     def learn(self, oldstate, action, newstate, reward):
         diff,_ = self.value_update(oldstate,action,newstate,reward)
         if self.dumbtraining == True:
-            self.change(oldstate,action,diff)
+            #self.change(oldstate,action,diff)
+            UNSUPPORTED
         else:
             self.learnbuffer += [(oldstate, action, newstate, reward)]
             self.learnbuffer = self.learnbuffer[-20000:]
             
-            self.train_on_minibatch()
+            #self.train_on_minibatch()
 
     def train_on_minibatch(self):
         n = min(300, len(self.learnbuffer))
@@ -341,15 +342,16 @@ class QNN (QCommon):
 
         #print("training minibatch of size %i:\n%s\n%s\n\n"%(n, str(inputs), str(outputs)))
 
-        training_data = libfann.training_data()
-        training_data.set_train_data(inputs, outputs)
-        self.NN.train_epoch(training_data)
-        #self.NN.train_on_data(training_data, 5, 0, 0)
-        #print(".")
+        self.NN.fit(np.array(inputs), np.array(outputs), batch_size=n, validation_split=0., verbose=0, nb_epoch=25)
+
 
     # must be called on every end-of-episode. might trigger batch-training or whatever.
-    #def episode(self):
-    #    pass
+    def episode(self):
+        self.train_on_minibatch()
+        self.train_on_minibatch()
+        self.train_on_minibatch()
+        self.train_on_minibatch()
+        return 42
 
 a = World(maze, start)
 
-- 
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