Not able to comprehend the error


Not able to comprehend the error.

It should properly execute.

Replace this line with your code. 
board = []
for i in range(5):
    board = ["O"] * 5
    print board


This line makes all the difference.

The code you wrote will do:

['O', 'O', 'O', 'O', 'O']
['O', 'O', 'O', 'O', 'O']
['O', 'O', 'O', 'O', 'O']
['O', 'O', 'O', 'O', 'O']
['O', 'O', 'O', 'O', 'O']

Whereas, the instruction says your code should do this:

.append() a list containing 5 "O"s to board

Which should result to the below.

[['O', 'O', 'O', 'O', 'O']]
[['O', 'O', 'O', 'O', 'O'], ['O', 'O', 'O', 'O', 'O']]
[['O', 'O', 'O', 'O', 'O'], ['O', 'O', 'O', 'O', 'O'], ['O', 'O', 'O', 'O', 'O']]
[['O', 'O', 'O', 'O', 'O'], ['O', 'O', 'O', 'O', 'O'], ['O', 'O', 'O', 'O', 'O'], ['O', 'O', 'O', 'O', 'O']]
[['O', 'O', 'O', 'O', 'O'], ['O', 'O', 'O', 'O', 'O'], ['O', 'O', 'O', 'O', 'O'], ['O', 'O', 'O', 'O', 'O'], ['O', 'O', 'O', 'O', 'O']]

So,just append.


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