Tuple, List, Dictionary, String Slice

 String Slice:

str='I love python.'

>>> print(str)

I love python.

>>> print(str[0])

I

>>> print(str[-1])

.

>>> print(str[7:12])

pytho

>>> print(str[7:13])

python

>>> print(str[7:13]*5)

pythonpythonpythonpythonpython

>>> print('hello '*5)

hello hello hello hello hello

>>> print(str[5:])

e python.

>>> print(str[:5])

I lov

 

Tuple:

A tuple is similar to the list as it also consists of a number of values separated by commas and enclosed within parentheses. Value within tuple can not be changed.

 

>>> t=(10,'ten',11,'eleven')

>>> t

(10, 'ten', 11, 'eleven')

>>> print(t)

(10, 'ten', 11, 'eleven')

>>> print(t[0])

10

>>> print(t*2)

(10, 'ten', 11, 'eleven', 10, 'ten', 11, 'eleven')

>>> print(t+t)

(10, 'ten', 11, 'eleven', 10, 'ten', 11, 'eleven')

>>> print(t[1:])

('ten', 11, 'eleven')

>>> print(t[:1])

(10,)

>>> print(t[:0])

()

>>> print(t[:2])

(10, 'ten')

>>> t1=(10 'ten')

SyntaxError: invalid syntax

>>> t1=(10, 'ten')

>>> print(t[:1])

(10,)

>>> print(t[1:])

('ten', 11, 'eleven')

>>> print(t1[1:])

('ten',)

 

List:

It is  most versatile data type in Python. It contains several type of data separated by comma.

 

>>> l=['a',12,'b',15]

>>> l

['a', 12, 'b', 15]

 

Dictionary;

It stores key-value pairs..

 

>>> d={'a':'apple','b':'ball','c':'cat'}

>>> print(d['a'])

apple

>>> print(d['a'])

apple

>>> print(d['a'])

 

 

Type casting : Explicit conversion of data type

 

>>> n=int(23.2)+int(24.5)

>>> n

47

 

Type Coercion: Implicit conversion of data type

>>> n=23+24.5

>>> n

47.5

>>> n=23.2+24

>>> n

47.2

>>> n=23+24

>>> n

47