28 Aug   Admin

for <var> in <iterable>:
    <statement(s)>

  is a collection of objects—for example, a list or tuple. The  in the loop body are denoted by indentation, as with all Python control structures, and are executed once for each item in . The loop variable  takes on the value of the next element in  each time through the loop.

Example–

 a = ['apple', 'banana', 'mango']
 for i in a:
    print(i)

Output-
apple
banana
mango
In this example, <iterable> is the list a, and <var> is the variable i. 
Each time through the loop, i takes on a successive item in a, 
so print() displays the values 'apple', 'banana', and 'mango', respectively.
 A for loop like this is the Pythonic way to process the items in an iterable.

Iterables

In Python, iterable means an object can be used in iteration. If an object is iterable, it can be passed to the built-in Python function iter(), which returns something called an iterator. Yes, the terminology gets a bit repetitive.