Python program for various list operations

Python code for various list operation

# Python code for various list operation

# declaring a list of integers
iList = [10, 20, 30, 40, 50, 60, 70, 80, 90, 100]

# List slicing operations
# printing the complete list
print('iList: ',iList)
# printing first element 
print('first element: ',iList[0]) 
# printing fourth element 
print('fourth element: ',iList[3]) 
# printing list elements from 0th index to 4th index
print('iList elements from 0 to 4 index:',iList[0: 5]) 
# printing list -7th or 3rd element from the list
print('3rd or -7th element:',iList[-7]) 


# appending an element to the list
iList.append(111)
print('iList after append():',iList)

# finding index of a specified element 
print('index of \'80\': ',iList.index(80))

# sorting the elements of iLIst
iList.sort()
print('after sorting: ', iList);

# popping an element
print('Popped elements is: ',iList.pop())
print('after pop(): ', iList);

# removing specified element
iList.remove(80)
print('after removing \'80\': ',iList)

# inserting an element at specified index 
# inserting 100 at 2nd index 
iList.insert(2, 100)
print('after insert: ', iList)

# counting occurances of a specified element
print('number of occurences of \'100\': ', iList.count(100))

# extending elements i.e. inserting a list to the list
iList.extend([11, 22, 33])
print('after extending:', iList)

#reversing the list
iList.reverse()
print('after reversing:', iList)

Output

iList:  [10, 20, 30, 40, 50, 60, 70, 80, 90, 100]  
first element:  10
fourth element:  40  
iList elements from 0 to 4 index: [10, 20, 30, 40, 50]
3rd or -7th element: 40 
iList after append(): [10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 111] 
index of '80':  7 
after sorting:  [10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 111] 
Popped elements is:  111
after pop():  [10, 20, 30, 40, 50, 60, 70, 80, 90, 100]  
after removing '80':  [10, 20, 30, 40, 50, 60, 70, 90, 100] 
after insert:  [10, 20, 100, 30, 40, 50, 60, 70, 90, 100]
number of occurences of '100':  2
after extending: [10, 20, 100, 30, 40, 50, 60, 70, 90, 100, 11, 22, 33] 
after reversing: [33, 22, 11, 100, 90, 70, 60, 50, 40, 30, 100, 20, 10]