In this tutorial, we discuss the concept of Python programming language data types.
The data type is an important concept in every language including python language. Python language has a variety of data types to manipulate the python program. The value of every python language is has a data type.
In this topic, we can see some of the important data types in Python that are listed below.
Python numbers as a data type are denoted by integers, floating point numbers and complex numbers in Python language.
The above three dtat types are defined as int, float and complex respectively
Example
age=20 //this is a variable age holds value 20 as integer type average=56.7 //this is a variable average holds value 56.7 as float data type num=1+2j //this is a variable num holds value 1+2j as complex data type
Program
a=5 #integer number
print("a is",a)
b=4.55 #floating point number
print("b is",b)
c=1+2j #floating point number
print("c is",c) When the above code is executed, it produces the following results
a is 5 b is 4.55 c is (1+2j)
The string is a sequence character In Python, we can use single quotes, double quotes or triple quotes for string representation.
Multi-line string can be denoted between triple quotes(”’, “””)
Example
str1='This is a string' // single quotes represant a Strng str2="This is another string" //double quotes represent a String str3="""This is multi line string"""//triple quotes represent a multi line String
Program
str1='Hollow i am Python'
print("str1[4]=",str1[4])
#display str1[4]
print("str1[1:6]=",str1[0:6])
#display str1[1:6]
print("str1[12:18]=",str1[12:18])
#display str1[12:18]
When the above code is executed, it produces the following results
str1[4]= o str1[1:6]= Hollow str1[12:18]=Python
This list is very easy to manipulate and a mostly used data type in python and it has an ordered sequential values in a single name.
All the items in a list may be the same type of variable but no need to be the same type.
It can have mixed data types
Example for list
marks=[45,67,87,65,48,98]; //list contains same data types
a=[34,54,56.7,”text”]//list contains different data type
Program
number=[2,4,6,8,10,12,14,16,18,20]
print("number[2]=",number[2])
#display number[2]
print("number[0:3]=",number[0:3])
#display number[0:3]
print("number[7:]=",number[7:])
#display number[7:] When the above code is executed, it produces the following results
number[2]= 6 number[0:3]= [2, 4, 6] number[7:]= [16, 18, 20]
A tuple is an ordered sequenced data type looks like a list, but both have some differences. Tuple has data between parenthesis and every data is separated by the symbol of “comma (,)”. A tuple can have a mix data type and its content can not be changed (immutable data type)
Example
Tuple1=() #empty tuple
Tuple1=(345) #Tuple can have single data type
Tuple3=("Blue", 555, 45.34, "Kamal", "Orange") #Tuple contains different data types
colour=("Blue", "Red", "Black", "White", "Orange") #Tuple contains same data types
Program
tuple=(23,"Python",4.3,1+2j) #display tuple[2] print "tuple[2]=",tuple[2] #display tuple[3] print "tuple[3]=",tuple[3] #display tuple[0:3] print "tuple[0:3]=",tuple[0:3]
When the above code is executed, it produces the following results
tuple[2]= 4.3 tuple[3]= (1+2j) tuple[0:3]= (23, 'Python', 4.3)
Python set is an irregular collection of unique items. Sets have data between braces(curly brackets) and every data is separated by the symbol of “comma “;
Example
fruits={"Mango","Apple","Pine apple","Orange"}
age={54,27,18,62,54,76,31}
Program
fruits={"Mango","Apple","Pine apple","Orange"}
print(fruits) When the above code is executed, it produces the following results
['Pine apple', 'Orange', 'Mango', 'Apple']
Python dictionary is an unordered collection of value with key-value pairs. Dictionaries are defined between curly brackets( braces) with each element of a pair of key-value.
When we use a huge amount of data we can use dictionary data type. when we know the key(pair of data) we can retrieve particular data or value
Dictionary form key: value
Example
Dict={1:name, 2:age, 3:male}
Program
Dict={1:34,2:56.5,3:'kumar'}
#display dictionary variable
print("Dict=",Dict)#display element Dictionary
print("Dict[2]=",Dict[2])#display element Dict[2]
When the above code is executed, it produces the following results
Dict= {1: 34, 2: 56.5, 3: 'kumar'}
Dict[2]=56.5
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