diff --git a/changes.patch b/changes.patch
new file mode 100644
index 00000000000..75bf0ab253c
Binary files /dev/null and b/changes.patch differ
diff --git a/client3.py b/client3.py
index 3fc09b75f16..433d53e4373 100644
--- a/client3.py
+++ b/client3.py
@@ -35,25 +35,40 @@ def getDataPoint(quote):
     stock = quote['stock']
     bid_price = float(quote['top_bid']['price'])
     ask_price = float(quote['top_ask']['price'])
-    price = bid_price
+    price = (bid_price + ask_price)/2
     return stock, bid_price, ask_price, price
 
 
 def getRatio(price_a, price_b):
     """ Get ratio of price_a and price_b """
     """ ------------- Update this function ------------- """
-    return 1
+    if (price_b == 0):
+        return None
+    
+    return price_a/price_b
 
 
 # Main
 if __name__ == "__main__":
-    # Query the price once every N seconds.
-    for _ in iter(range(N)):
+    for _ in range(N):
         quotes = json.loads(urllib.request.urlopen(QUERY.format(random.random())).read())
 
-        """ ----------- Update to get the ratio --------------- """
+        # Initialize variables to store prices of both stocks
+        prices = {}
+
+        # Process the quotes
         for quote in quotes:
             stock, bid_price, ask_price, price = getDataPoint(quote)
-            print("Quoted %s at (bid:%s, ask:%s, price:%s)" % (stock, bid_price, ask_price, price))
+            prices[stock] = price
+            print("Quoted %s at (bid: %s, ask: %s, price: %s)" % (stock, bid_price, ask_price, price))
+
+        # Calculate the ratio of the two stock prices
+        if 'ABC' in prices and 'DEF' in prices:
+            ratio = getRatio(prices['ABC'], prices['DEF'])
+            if ratio is not None:
+                print("Ratio of ABC to DEF: %s" % ratio)
+            else:
+                print("Cannot calculate ratio due to division by zero.")
+
+                
 
-        print("Ratio %s" % getRatio(price, price))
diff --git a/server3.py b/server3.py
index 1836de22ee5..67c87c98362 100644
--- a/server3.py
+++ b/server3.py
@@ -19,7 +19,6 @@
 #  DEALINGS IN THE SOFTWARE.
 
 import csv
-# from BaseHTTPServer import BaseHTTPRequestHandler,HTTPServer
 import http.server
 import json
 import operator
@@ -27,7 +26,6 @@
 import re
 import threading
 from datetime import timedelta, datetime
-# from itertools import izip
 from random import normalvariate, random
 from socketserver import ThreadingMixIn
 
@@ -53,7 +51,6 @@
 
 OVERLAP = 4
 
-
 ################################################################################
 #
 # Test Data
@@ -148,7 +145,7 @@ def order_book(orders, book, stock_name):
 
 def generate_csv():
     """ Generate a CSV of order history. """
-    with open('test.csv', 'wb') as f:
+    with open('test.csv', 'w') as f:  # Fixed file mode from 'wb' to 'w'
         writer = csv.writer(f)
         for t, stock, side, order, size in orders(market()):
             if t > MARKET_OPEN + SIM_LENGTH:
@@ -269,8 +266,8 @@ def _current_book_1(self):
             if REALTIME:
                 while t > self._sim_start + (datetime.now() - self._rt_start):
                     yield t, bids, asks
-            else:
-                yield t, bids, asks
+           
+
 
     @property
     def _current_book_2(self):