How can I extract these list and tuples into strings?

Question

I have these lists and tuples and can't figure out how to extract the numbers out of them.

[('40', '50')] [('35', '45', '49')] [('02', '11')]

They are stored in three different variables, how can I extract them? I've tried the following:

chain.from_iterable(list_one)

but it gives me this:

<itertools.chain object at 0x1101415f8>

Expected output for [('40', '50')] is 40 50

Expected output for [('35', '45', '49')] is 35 45 49

Expected output for [('02', '11')] is 02 11

Answer 1

Use chain to chain your lists together and then iterate through them. Then you can unpack in the print call to get every sub-element element printed out.

So, if for example your lists are named l1 , l2 and l3 as so:

l1, l2, l3 = [('40', '50')], [('35', '45', '49')], [('02', '11')]

You're able to access each individual and print it with:

for sub in chain(l1, l2, l3):
    print(*sub)

Yields:

40 50
35 45 49
02 11

Now, the output from your original attempt, namely:

<itertools.chain object at 0x1101415f8>

is due to the fact that chain returns an iterator object and that is its representation in the Python REPL. Remember, iterators are meant to be iterated over.

Answer 2

To get each seperately as string:

 output = ""
    a = [('02', '11')]
    for i in a:
        for x in i:
            output = output + " " + x