Appending To Files Challenge

[erfanakbari1]

# I Write a program to append the times table for our poem in sample.txt .

So , this is all of my code

numbers = 1
for i in range(2, 12):
    while 13 >= numbers > 0:
        multiply = numbers * i
        print('| {0} Times {1} is {2} '.format(numbers, i, multiply))
        numbers += 1
print('=' * 21)

with open('times_table.txt', 'w') as times:
    for table in times:
        print(table, file=times)

And the output is :

Output:
| 1 Times 2 is 2 
| 2 Times 2 is 4 
| 3 Times 2 is 6 
| 4 Times 2 is 8 
| 5 Times 2 is 10 
| 6 Times 2 is 12 
| 7 Times 2 is 14 
| 8 Times 2 is 16 
| 9 Times 2 is 18 
| 10 Times 2 is 20 
| 11 Times 2 is 22 
| 12 Times 2 is 24 
| 13 Times 2 is 26 
========================================

But because of code at the end lines for files appending , I'm facing this error below :

Error:
Traceback (most recent call last):
  File "C:/Users/debug system/IdeaProjects/LearnPY/02/I_O - Challenge.py", line 11, in <module>
    for table in times:
io.UnsupportedOperation: not readable

So , finally I don't know how to append this time table stuffs into a sample.txt file .
I really appreciate you all guys . If you can possibly help me with this .
Thanks .