Question

The following code creates a multi dimensional list (not sure if that’s the Pythonic was of saying it. PHP guy here)

patterns.append(list(itertools.permutations('1234567',7)))

the value of patterns becomes:

([
    [1,2,3,4,5,6,7],
    [1,2,3,4,5,7,6], ...

])

What I want is for the result to be like this:

([1,2,3,4,5,6,7], [1,2,3,4,5,7,6]...)

If i try doing:

patterns = list(itertools.permutations('1234567',7))

the result is a list of individual numbers

123445671234576

What am I missing?

Thanks,

Answer 1

You extend() instead of append().

patterns.extend(itertools.permutations('1234567',7))

This also makes list() redundant because extend() works on iterables.

This assumes you are ok with the permutations themselves being tuples. Your question is confusing because you the notation doesn’t correspond with what you wrote in words.