Looping through list in pairs or more

Question

Simplest way to iterate in pairs or more in python over a single list?

list1=['Hello ','World','.','I ','heart ','python']

Something like this:

for x,y,z in list1:
    print x,y,z

What I would like to get as a result:

Hello World.

I heart python

I know I can do it like this but I would like to know if there is something that doesn't require index counting. Preferably using a for loop.

index=0
while index<len(list1):
     print list1[index],list1[index+1],list1[index+2]
     index+=3

I suppose it is. I didn't think to add the word 'chunk'to my search so that question never came up. — user3803165, Aug 07 '14 at 16:49

score 0 · Accepted Answer · answered Aug 07 '14 at 17:01

0

The easiest way would be to use zip to turn your list into a list of tuples, and then u can iterate over that:

list1 = zip(list1[0::2], list1[1::2])
for elem1, elem2 in list1:
   print elem1, elem2

answered Aug 07 '14 at 17:01

TheoretiCAL

And if there is an odd number of items in the list, you lose the last item. – John Mee Apr 30 '15 at 13:44

score 0 · Answer 2 · answered Aug 07 '14 at 17:06

0

Not sure how more or less pythonic this is but

for x, y, z in zip(list1[::3],list1[1::3], list1[2::3]):
  print x+y+z

answered Aug 07 '14 at 17:06

dloman

2 Answers2