import datetime


t = open("demofile.txt", "r")
print (t.read())

s = open("demofile.txt", "a+")
for i in range (2):
    {
s.write("Appended line %d\r\n" % (i+1))
-s.write("today is %d\r\n" % datetime.date.today().day)
}
s.close()
print (t.read())
t.close()

datetime.date.today().day