Timestamp doesn't change with each loop

[lwhistler]

• How can I  get the timestamp to update after every loop?
  
• The way it is now it just outputs the same time.
  
• Since it is inside a loop I would expect it to update.
  

import datetime
import time


now=datetime.datetime.now()
fileName=now.strftime("%Y-%m-%d-%H%M%S")

secondsDay=86400

while (secondsDay >= 1):
    degrees=str("{0:.2f}".format(secondsDay/240))
    timeStamp=now.strftime("%Y-%m-%d-%H:%M:%S")
    DataOut = timeStamp + "," + degrees + "\n"
    file = open(fileName,"a")
    file.write(DataOut)
    secondsDay=secondsDay-1
    print (DataOut)
    time.sleep(1)