enumerate(iterable, start=0)

Returns test

iterable	??
start	??

REMARKS

* No prefix required - Core
* Return an enumerate object. iterable must be a sequence, an iterator, or some other object which supports iteration.
* The __next__() method of the iterator returned by enumerate() returns a tuple containing a count (from start which defaults to 0) and the values obtained from iterating over iterable.

seasons = ['Spring', 'Summer', 'Fall', 'Winter'] 
list(enumerate(seasons)) 
[(0, 'Spring'), (1, 'Summer'), (2, 'Fall'), (3, 'Winter')] 
list(enumerate(seasons, start=1)) 
[(1, 'Spring'), (2, 'Summer'), (3, 'Fall'), (4, 'Winter')] 

'Equivalent to:

def enumerate(iterable, start=0): 
    n = start 
    for elem in iterable: 
        yield n, elem 
        n += 1