enumerate() : to get enumerate object by using iterable object with optional start number

plus2net.com offers FREE online classes on Basics of Python for selected few visitors.
Read more on course content , Details about the Program.

enumerate(iterator,start) get enumerate object
iterator: Any iterator object or sequence of numbers
start: (optional) Starting number , default value is 0
Example of iterable objects are : List, tuple, dictionary , string

enumerate method ads counter to any iterable object. Each elements of the input object gets an unique incremental number for all its elements.

We will use a list

my_list=['One','Two','Three','Four']
en=enumerate(my_list)
print(list(en))

Output

[(0, 'One'), (1, 'Two'), (2, 'Three'), (3, 'Four')]

Using index and value of a list.

my_list=['Alex','Ronald','John']
for i, my_name in enumerate(my_list):
    print('Name #{}: {}'.format(i + 1, my_name))

Output

Name #1: Alex
Name #2: Ronald
Name #3: John

With start

We can set starting number to any value, by default starting is 0. We used a tuple()

my_list=('One','Two','Three','Four')
en=enumerate(my_list,100)
print(list(en))

Output

[(100, 'One'), (101, 'Two'), (102, 'Three'), (103, 'Four')]

Let us use one string

my_str='plus2net'
en=enumerate(my_str)
print(list(en))

Output

[(0, 'p'), (1, 'l'), (2, 'u'), (3, 's'), (4, '2'), (5, 'n'), (6, 'e'), (7, 't')]

Checking data type

We will use type() to get the data type

my_list=['One','Two','Three','Four']
en=enumerate(my_list)
print(type(en))   # <class 'enumerate'>

All Built in Functions in Python interator generator float()

Math Functions math.fabs() Python- Tutorials