Translating this to a list comprehension?

[gblomqvist]

Hi,

Say that I have these for-loops:

s = ''

for y in range(a):
    for x in range(b):
        if (x, y) in some_collection:
            s += 'x'
        else:
            s += '-'

    s += '\n'

I want to translate it into a list comprehension (for fun, as an exercise  ) , and I've come this far:

''.join(['x' if (x, y) in some_collection else '-' for y in range(a) for x in range(b)])

But I still need to add a newline character ('\n') after every iteration of the first loop. How do I do that? Is it even possible?


Thanks!

/gb