iterating on slices of array in Python, with number of variables

Question

Let's say I get a list, and I want to iterate on three at a time. I.e.: I have a list with [1,4,5,6,7,8,-9,2,0] In TCL, I can just use (for example):

foreach { x y z } $list {
   puts "x is ${x}"
   puts "y is ${y}"
   puts "z is ${z}"
}

How can I define more than 1 variable, using the for loop with the in (array name) in Python 3.3? The Python org wiki showed just example of 1 iteration variable. This is also easily done in Ruby
Thanks.

EDIT: The expected output is:

x is 1
y is 4
z is 5
x is 6
y is 7
z is 8
x is -9
y is 2
z is 0

Can you tell what is the expected output of your sample program? What happens if the array length cannot be divided by 3? — SomethingSomething
– SomethingSomething, Commented Apr 3, 2018 at 9:34
I think this thread could help you, if this is your scenario. Hard to tell without the expected output for your example: stackoverflow.com/questions/5764782/… — SomethingSomething
– SomethingSomething, Commented Apr 3, 2018 at 9:37
You got it right. The assumption is that it is already qualified for the range of 3. It was a general syntax question. Thanks. — user1134991
– user1134991, Commented Apr 3, 2018 at 9:40
I'm still not sure whether you expect to see 1, 4, 5, then 6, 7, 8 and then -9, 2, 0, OR whether you expect to see 1, 4, 5, then 4, 5, 6, then 5, 6, 7 and so on.. I think you should refine your question in order to be able to get a well-explained answer — SomethingSomething
– SomethingSomething, Commented Apr 3, 2018 at 9:42

Nestor Yanchuk · Accepted Answer · 2018-04-03 09:34:55Z

2

You can split this array into chunks, and then just do something like this:

for x,y,z in chunked_array:
    print("x=", x)
    print("y=", y)
    print("z=", z)

answered Apr 3, 2018 at 9:34

Nestor Yanchuk

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