This doesn't seem to have been answered...
"Shi Mu" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]
>I can not understand the use of "cell in row" for two times in the code:
>
> # convert the matrix to a 1D list
> matrix = [[13,2,3,4,5],[0,10,6,0,0],[7,0,0,0,9]]
> items = [cell for row in matrix for cell in row]
> print items
Lets expand the list comprehension:
matrix = [[13,2,3,4,5],[0,10,6,0,0],[7,0,0,0,9]]
items = []
for row in matrix:
for cell in row:
items.append(cell)
print items
Does that explain whats going on? Its just nesting another for loop.
HTH,
--
Alan G
Author of the learn to program web tutor
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