title: \n "unexpected character after line continuation character"
body: <p>I have a recurring problem when trying to use \n in python. I'm trying to get the code to write to a text file after extracting data from another text file howeve when i run the code it always shows a  "unexpected character after line continuation character" error after the \n.  This is the code i am currently using. </p>
  
  <pre><code>while True:
   while True:
      try:
          Prod_Code = input("enter an 8 digit number or type Done to get your final receipt: ")
          check = len(Prod_Code)
          int(Prod_Code) 
  
          if check == 8:
              print("This code is valid")
  
  
  
              with open('Data Base.txt', 'r') as searchfile:
                  for line in searchfile:
                      if Prod_Code in line:
                          print(line)
                          receipt = open('Receipt.txt', 'w')
                          receipt.write(line, \n)
                          receipt.close()
                          break
  
          else:
              print("incorrect length, try again")
  
      except ValueError:
          if Prod_Code == "Done":
              print("Your receipt is being calculated")
              exit()
  
          else:
               print("you must enter an integer")
  </code></pre>