diff --git a/._epd4in2.py b/._epd4in2.py
new file mode 100644
index 0000000..af15ded
Binary files /dev/null and b/._epd4in2.py differ
diff --git a/epd4in2.py b/epd4in2.py
index 65b69fc..80b8cb1 100644
--- a/epd4in2.py
+++ b/epd4in2.py
@@ -227,8 +227,8 @@ class EPD:
         return 0
 
     def getbuffer(self, image):
-        # print "bufsiz = ",(self.width/8) * self.height
-        buf = [0xFF] * ((self.width/8) * self.height)
+        print ("bufsiz = ",(self.width/8) * self.height)
+        buf = [0xFF] * int(((self.width/8) * self.height))
         image_monocolor = image.convert('1')
         imwidth, imheight = image_monocolor.size
         pixels = image_monocolor.load()
@@ -247,25 +247,25 @@ class EPD:
                     newx = y
                     newy = self.height - x - 1
                     if pixels[x, y] == 0:
-                        buf[(newx + newy*self.width) / 8] &= ~(0x80 >> (y % 8))
+                        buf[int((newx + newy*self.width) / 8)] &= ~(0x80 >> (y % 8))
         return buf
 
     def display(self, image):
         self.send_command(DATA_START_TRANSMISSION_1)
-        for i in range(0, self.width * self.height / 8):
+        for i in range(0, int(self.width * self.height / 8)):
             self.send_data(0xFF)
         self.send_command(DATA_START_TRANSMISSION_2)
-        for i in range(0, self.width * self.height / 8):
+        for i in range(0, int(self.width * self.height / 8)):
             self.send_data(image[i])
         self.send_command(DISPLAY_REFRESH) 
         self.wait_until_idle()
         
     def Clear(self, color):
         self.send_command(DATA_START_TRANSMISSION_1)
-        for i in range(0, self.width * self.height / 8):
+        for i in range(0, int(self.width * self.height / 8)):
             self.send_data(0xFF)
         self.send_command(DATA_START_TRANSMISSION_2)
-        for i in range(0, self.width * self.height / 8):
+        for i in range(0, int(self.width * self.height / 8)):
             self.send_data(0xFF)
         self.send_command(DISPLAY_REFRESH) 
         self.wait_until_idle()
diff --git a/install/ebb-carousel.service b/install/ebb-carousel.service
index 48f26b7..a64fe8c 100644
--- a/install/ebb-carousel.service
+++ b/install/ebb-carousel.service
@@ -3,7 +3,7 @@ Description=the EBB carousel
 After=network.target
 
 [Service]
-ExecStart=/usr/bin/python -u carousel.py
+ExecStart=/usr/bin/python3 -u carousel.py
 WorkingDirectory=/home/pi/ebb
 StandardOutput=inherit
 StandardError=inherit