Question

So I have these tuples in two lists in another tuple which look like

data_tuple = ([(1,2,3),(4,5,6)(7,8,9)],[(a,b,c),(d,e,f)(g,h,i)])

I want to build a set of coordinates using the corresponding indexed elements from each list, so that it looks like

final = [(2,b),(5,e),(8,h)]

Here’s what I got:

for a in data_tuple[0]:
    x = a[1]
    for b in data_tuple[1]:
        y = b[1]
        print(x,y)

For now I just wanna check if my iteration/indentation is right so I don’t need to put them in a list just yet. Right now the outcome for this particular code is

(2,b)
(2,e)
(2,h)
(5,b)
(5,e)

and so on until it reaches (8,h).

If I bring my print line to the left, under the second for loop, I get

(2,h)
(5,h)
(8,h)

How do I fix this? Sorry if I don’t make any sense =/. As you can tell I’m extremely new to Python so I’m not familiar with a lot of import modules. Any help please?

Answer 1

>>> print [(i[0][1],i[1][1]) for i in zip(*data_tuple)]
[(2, 'b'), (5, 'e'), (8, 'h')]

but often clarity is more important than brevity

I dont really understand your original question since it looks like its working as intended that implies your indentation and iteration is fine..

[edit] this is what you want i think

for i in range(len(data_tuple[0]):
    x,y = data_tuple[0][i][1],data_tuple[1][i][1],
    print (x,y)

or

>>> for numbr,letr in zip(*data_tuple):
...     x,y = numbr[1],letr[1]
...     print(x,y)
...