title: python no module named serial
body: <p>I am having a problem with my python program. I wrote the program to get the data(temperature) from arduino to my raspberry pi sqlite database. but it gives me an error at line4(import serial) saying "ImportError: No module named serial". I use python3 and have already updated the pyserial. i am new in python so i am making some mistakes...</p>
  
  <pre><code> #!/ussr/bin/python
   # -*- coding: utf-8 -*-
  
   import serial
   import datetime
   import sqlite3 as lite
   import sys
   import time
  
   ser = serial.Serial('/dev/ttyACM1', 9600, timeout=1)
   ser.open()
  
   count = 0
  
   con = lite.connect('realtime_data.db')
  
   try:
         while 1:
           indata = ser.readline()
           current_time = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
           count = count + 1
  
           print (count)
  
           with con:
             cur = con.cursor()
             cur.execute("INSERT INTO Temperatures VALUES( ?, ?, ? )", (count, current_time, indata))
             if count &gt; 100:
               cur.execute("DELETE FROM Temperatures")
               count = 0
  
          # time.sleep(3) #upload to database every 5 seconds
  
   except KeyboardInterrupt:
         ser.close()
  </code></pre>