Array in Python Set 1

Array in Python | Set 1 (Introduction and Functions)

Other than some generic containers like list, Python in its definition can also handle containers with specified data types. Array can be handled in python by module named “array“, like we used to store in other programming language. They can be useful when we have to manipulate only a specific data type values.

Operations on Array :

1. array(data type, value list) :- This function is used to create an array with data type and value list specified in its arguments. Some of the data types are mentioned in the table below.

Lets have a look into them

2. append() :- This function is used to add the value mentioned in its arguments at the end of the array.

3. insert(i,x) :- This function is used to add the value at the position specified in its argument.

# Python code to demonstrate the working of 

# array(), append(), insert()

   

# importing "array" for array operations

import array

   

# initializing array with array values

# initializes array with signed integers

arr = array.array('i', [1, 2, 3, 4]) 

  

# printing original array

print ("The new created array is : ",end=" ")

for i in range (0, 3):

    print (arr[i], end=" ")

  

print("\r")

  

# using append() to insert new value at end

arr.append(8);

  

# printing appended array

print("The appended array is : ", end="")

for i in range (0, 4):

    print (arr[i], end=" ")

      

# using insert() to insert value at specific position

# inserts 5 at 2nd position

arr.insert(2, 5)

  

print("\r")

  

# printing array after insertion

print ("The array after insertion is : ", end="")

for i in range (0, 5):

    print (arr[i], end=" ")




output :

The new created array is :  1 2 3 
The appended array is : 1 2 3 4 
The array after insertion is : 1 2 5 3 4 







4. pop() :- This function removes the element at the position mentioned in its argument, and returns it.

5. remove() :- This function is used to remove the first occurrence of the value mentioned in its arguments.

# Python code to demonstrate the working of 

# pop() and remove()

   

# importing "array" for array operations

import array

   

# initializing array with array values

# initializes array with signed integers

arr= array.array('i',[1, 2, 3, 1, 5]) 

  

# printing original array

print ("The new created array is : ",end="")

for i in range (0,5):

    print (arr[i],end=" ")

  

print ("\r")

  

# using pop() to remove element at 2nd position

print ("The popped element is : ",end="")

print (arr.pop(2));

  

# printing array after popping

print ("The array after popping is : ",end="")

for i in range (0,4):

    print (arr[i],end=" ")

  

print("\r")

  

# using remove() to remove 1st occurrence of 1

arr.remove(1)

  

# printing array after removing

print ("The array after removing is : ",end="")

for i in range (0,3):

    print (arr[i],end=" ")




output :

The new created array is : 1 2 3 1 5 
The popped element is : 3
The array after popping is : 1 2 1 5 
The array after removing is : 2 1 5 

6. index() :- This function returns the index of the first occurrence of value mentioned in arguments.

7. reverse() :- This function reverses the array.

# Python code to demonstrate the working of 

# index() and reverse()

   

# importing "array" for array operations

import array

   

# initializing array with array values

# initializes array with signed integers

arr= array.array('i',[1, 2, 3, 1, 2, 5]) 

  

# printing original array

print ("The new created array is : ",end="")

for i in range (0,6):

    print (arr[i],end=" ")

  

print ("\r")

  

# using index() to print index of 1st occurrenece of 2

print ("The index of 1st occurrence of 2 is : ",end="")

print (arr.index(2))

  

#using reverse() to reverse the array

arr.reverse()

  

# printing array after reversing

print ("The array after reversing is : ",end="")

for i in range (0,6):

    print (arr[i],end=" ")







output :




The new created array is : 1 2 3 1 2 5 
The index of 1st occurrence of 2 is : 1
The array after reversing is : 5 2 1 3 2 1 

In this article i have given an introduction on array.

Next Article : Array in Python Set 2

Recommended post : Introduction to Data types

String in Python

Tuple in Python

Output formatting in Python

 #machine learning using python

 #matplotlib

 #python 3

 #scikit learn

 #tkinter
 #python training
 #python data analysis
 #best python tutorial
 #python classes near me
 #learn python for beginners
 #python online training
 #django course
 #advanced python course
 #python course fees
 #introduction to data science in python
 #free python tutorial
 #learn python basics