Examples of how to get every nth element in a list in python:
Create a list in python
Lets first create a list in python
mylist = ['a','b','c','d','e','f','g','h','i']
To get an element stored in a list using its indexe:
mylist[0]
returns
'a'
and
mylist[4]
returns
'e'
Get every nth element in a list
To get every nth element in a list, a solution is to do mylist[::n].
To get for example every 2 elements in a list:
mylist[::2]
returns
['a', 'c', 'e', 'g', 'i']
Another example
mylist[::3]
returns
['a', 'd', 'g']
Get every nth element in a list, between indexes m1,m2
To get every nth element in list, between indexes m1,m2, a solution is to do mylist[m1:m2:n]. Example:
mylist[0:4:2]
returns
['a', 'c']
