enumerate

enumerate(iterable, start=0)

Returns an enumerate object (built-in).

iterable	??
start	??

REMARKS

* This is a built-in function.
* 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.
* For the Official documentation refer to python.org

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 

grocery = ['bread', 'milk', 'butter']  
enumerateGrocery = enumerate(grocery) 

print(type(enumerateGrocery)) 

# converting to list 
print(list(enumerateGrocery)) 

# changing the default counter 
enumerateGrocery = enumerate(grocery, 10) 
print(list(enumerateGrocery))