Some changes on "Optical Character Recognition (OCR)"

ocr/code/ocr.js

@@ -147,4 +147,4 @@ var ocrDemo = {
         xmlHttp.setRequestHeader("Connection", "close");
         xmlHttp.send(msg);
     }
-}
+}

ocr/code/ocr.py

@@ -63,7 +63,7 @@ def _draw(self, sample):
     def train(self, training_data_array):
         for data in training_data_array:
             # Step 2: Forward propagation
-            y1 = np.dot(np.mat(self.theta1), np.mat(data['y0']).T)
+            y1 = np.dot(np.mat(self.theta1), np.mat(data.y0).T)
             sum1 =  y1 + np.mat(self.input_layer_bias) # Add the bias
             y1 = self.sigmoid(sum1)
 
@@ -73,12 +73,12 @@ def train(self, training_data_array):
 
             # Step 3: Back propagation
             actual_vals = [0] * 10 # actual_vals is a python list for easy initialization and is later turned into an np matrix (2 lines down).
-            actual_vals[data['label']] = 1
+            actual_vals[data.label] = 1
             output_errors = np.mat(actual_vals).T - np.mat(y2)
             hidden_errors = np.multiply(np.dot(np.mat(self.theta2).T, output_errors), self.sigmoid_prime(sum1))
 
             # Step 4: Update weights
-            self.theta1 += self.LEARNING_RATE * np.dot(np.mat(hidden_errors), np.mat(data['y0']))
+            self.theta1 += self.LEARNING_RATE * np.dot(np.mat(hidden_errors), np.mat(data.y0))
             self.theta2 += self.LEARNING_RATE * np.dot(np.mat(output_errors), np.mat(y1).T)
             self.hidden_layer_bias += self.LEARNING_RATE * output_errors
             self.input_layer_bias += self.LEARNING_RATE * hidden_errors

ocr/code/server.py

@@ -1,4 +1,4 @@
-import BaseHTTPServer
+import http.server
 import json
 from ocr import OCRNeuralNetwork
 import numpy as np
@@ -20,7 +20,7 @@
 # for hidden nodes
 nn = OCRNeuralNetwork(HIDDEN_NODE_COUNT, data_matrix, data_labels, list(range(5000)));
 
-class JSONHandler(BaseHTTPServer.BaseHTTPRequestHandler):
+class JSONHandler(http.server.BaseHTTPRequestHandler):
     def do_POST(s):
         response_code = 200
         response = ""
@@ -44,18 +44,18 @@ def do_POST(s):
         s.send_header("Access-Control-Allow-Origin", "*")
         s.end_headers()
         if response:
-            s.wfile.write(json.dumps(response))
+            s.wfile.write(bytes(json.dumps(response), "utf-8"))
         return
 
 if __name__ == '__main__':
-    server_class = BaseHTTPServer.HTTPServer;
+    server_class = http.server.HTTPServer;
     httpd = server_class((HOST_NAME, PORT_NUMBER), JSONHandler)
 
     try:
         httpd.serve_forever()
     except KeyboardInterrupt:
         pass
     else:
-        print "Unexpected server exception occurred."
+        print("Unexpected server exception occurred.")
     finally:
         httpd.server_close()