Python Data Types

Python has classified into two category Mutable and Immutable data types. 1. Numbers 2. Strings 3. Tuples 4. Lists 5. Dictionaries 6. Sets.
Hemarangan S

PYTHON DATA TYPES

Python Programming datatypes is important concept. Python have 5 data types. We will learn it.

 

Python Data Types

1.     1. Numeric

·           Integer

·           Float

·           Complex

2.     2.Dictionary

3.     3.Set

4.     4.Boolean

5.     5.Sequence Type

·          Strings

·          Lists

·          Tuples

 

Python has classified into two category Mutable and Immutable 

data types. Python have various data types. We will learn main 

datatypes in python. There are

1.     Numbers

2.     Strings

3.     Tuples

4.     Lists

5.     Dictionaries

6.     Sets

 

We will learn Boolean and Built-in-data types in python later.

 

Now, we will learn above 6 datatypes in python. Let's start.

 

Numbers:

In python Numbers are Integers, Float and Complex.

 

1.     Integers: Integers have whole values. Example: 1,2,3,4, etc.

2.     Float: Float values have decimal value. Example: 1.7, 5/2=2.5

3.     Complex: Example: 3+2j, (4+4j) +(3+3j) = 7+7j

 

In above examples, I hope you understand it. 

 

Let’s move on Strings

 

Strings:

 

Strings are sequences of characters strings.

 

Example 1:

‘Python’ and “HRS INTERSTING FACTS”

You can also use multi-line strings by using triple quotes (“”” or’’’)

Triple quotes we already discuss about Triple quotes. If you not see 

it. Link has given below.

 

Example 2:

“”” Hello guys,

Welcome to HRS INTERSTING FACTS

Python Programming Tutorial.”””

Example Program:

st1='hrs'

st2="interesting"

st3=""" Hello guys,

Welcome to HRS INTERSTING FACTS

Python Programming Tutorial."""

st4="let's Start"

print(st1)

print(st2)

print(st3)

print(st4)

Output:

hrs

interesting

 Hello guys,

Welcome to HRS INTERSTING FACTS

Python Programming Tutorial.

let's Start

In above example st4="let's Start" is valid.

If you type st4=’let's Start’ is invalid. Because single quote started and ended again single quote start but not end so, by using double quotes can solve it.

We’ll learn sequence string operations in upcoming posts.

 

Tuple:

A tuple is sequence of immutable python object like floating 

number, string literal etc.

The tuple can’t be changed unlike lists.

Tuples are define using parenthesis ().

Example:

my_tuple=('a',"Welcome",2)

print(my_tuple)

Output:

('a', 'Welcome', 2)

We’ll learn tuple sequence operations in upcoming posts.

 

List:

A list is a sequence of mutable python object like float, string etc.

It defined using Square braces[].

Example:

my_list=['python', 2.7,5]

print(my_list)

Output:

['python', 2.7, 5]

 

Dictionaries

A python dictionary is a collection of unordered, changeable and \

indexed.

It has defined by curly braces {}

It have keys and values.

 

Example:

My_dict={1:’python’,2:’programming’}

                  ↓                     ↓

                  Key                 Value

Dictionary is not allows duplicate keys.

My_dict={} #empty

My_dict={1:’apple’, 2:’ball’} #integer keys

My_dict={‘name:’rangan’, 1:[2,4,6]} # mixed keys

Example Program

# Dictionary

Mydict={1:'python',2:'programming'}

print("Mydict=",Mydict,"This Integer keys")

Mydict1={'First name': 'Hemarangan', 'Last name':"S"}

print(Mydict1)

Mydict2={'Welcome':'HRS',2:[2,4,6]}

print("Mixed Keys",Mydict2)

 

print("Dictionary not allows duplicate keys")

# Dictionary not allows duplicate keys

print("Before")

Mydict={1:'python',2:'programming'}

print(Mydict)

print("After")

Mydict={1:'python',2:'programming',2:"hello"}

print(Mydict)


Output:

Mydict= {1: 'python', 2: 'programming'} This Integer keys

{'First name': 'Hemarangan', 'Last name': 'S'}

Mixed Keys {'Welcome': 'HRS', 2: [2, 4, 6]}

Dictionary not allows duplicate keys

Before

{1: 'python', 2: 'programming'}

After

{1: 'python', 2: 'hello'}

 

Sets:

A set is an unordered collection of items.

Every element is unique (no duplicates).

It must be immutable which cannot be changed.

My_set= {1,2,3}

Example:

myset={1,2,3,5,3,6,7}

print(myset)

Output:

{1,2,3,5,6,7}

In above example program, myset={1,2,3,5,3,6,7} then print myset it shows the result {1,2,3,5,6,7}. Because 3 value two time repeated so sets is not allowed duplicate values.

We will learn briefly all data types in python in upcoming posts.

I hope you guys, you will understand it. If you have any queries about python data types, please comment or contact me.

If this article helpful you click like and leave a comment.

Thank guys.

 Upcoming: Sequence operations in Python Strings.

Hemarangan S