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Operator Functions in Python | Set 2

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Operator Functions in Python | Set 1

More functions are discussed in this article.

1. setitem(ob, pos, val) :- This function is used to assign the value at a particular position in the container. 
Operation – ob[pos] = val

2. delitem(ob, pos) :- This function is used to delete the value at a particular position in the container. 
Operation – del ob[pos]

3. getitem(ob, pos) :- This function is used to access the value at a particular position in the container. 
Operation – ob[pos]
 

Python3

# Python code to demonstrate working of 
# setitem(), delitem() and getitem()
  
# importing operator module 
import operator
  
# Initializing list
li = [1, 5, 6, 7, 8]
  
# printing original list 
print ("The original list is : ",end="")
for i in range(0,len(li)):
    print (li[i],end=" ")
  
print ("\r")
  
# using setitem() to assign 3 at 4th position
operator.setitem(li,3,3)
  
# printing modified list after setitem()
print ("The modified list after setitem() is : ",end="")
for i in range(0,len(li)):
    print (li[i],end=" ")
  
print ("\r")
  
# using delitem() to delete value at 2nd index
operator.delitem(li,1)
  
# printing modified list after delitem()
print ("The modified list after delitem() is : ",end="")
for i in range(0,len(li)):
    print (li[i],end=" ")
  
print ("\r")
  
# using getitem() to access 4th element
print ("The 4th element of list is : ",end="")
print (operator.getitem(li,3))

                    

Output: 
 

The original list is : 1 5 6 7 8 
The modified list after setitem() is : 1 5 6 3 8 
The modified list after delitem() is : 1 6 3 8 
The 4th element of list is : 8


4. setitem(ob, slice(a,b), vals) :- This function is used to set the values in a particular range in the container. 
Operation – obj[a:b] = vals

5. delitem(ob, slice(a,b)) :- This function is used to delete the values from a particular range in the container. 
Operation – del obj[a:b]

6. getitem(ob, slice(a,b)) :- This function is used to access the values in a particular range in the container. 
Operation – obj[a:b]
 

Python3

# Python code to demonstrate working of 
# setitem(), delitem() and getitem()
  
# importing operator module 
import operator
  
# Initializing list
li = [1, 5, 6, 7, 8]
  
# printing original list 
print ("The original list is : ",end="")
for i in range(0,len(li)):
    print (li[i],end=" ")
  
print ("\r")
  
# using setitem() to assign 2,3,4 at 2nd,3rd and 4th index
operator.setitem(li,slice(1,4),[2,3,4])
  
# printing modified list after setitem()
print ("The modified list after setitem() is : ",end="")
for i in range(0,len(li)):
    print (li[i],end=" ")
  
print ("\r")
  
# using delitem() to delete value at 3rd and 4th index
operator.delitem(li,slice(2,4))
  
# printing modified list after delitem()
print ("The modified list after delitem() is : ",end="")
for i in range(0,len(li)):
    print (li[i],end=" ")
  
print ("\r")
  
# using getitem() to access 1st and 2nd element
print ("The 1st and 2nd element of list is : ",end="")
print (operator.getitem(li,slice(0,2)))

                    

Output: 
 

The original list is : 1 5 6 7 8 
The modified list after setitem() is : 1 2 3 4 8 
The modified list after delitem() is : 1 2 8 
The 1st and 2nd element of list is : [1, 2]


 
7. concat(obj1,obj2) :- This function is used to concatenate two containers. 
Operation – obj1 + obj2

8. contains(obj1,obj2) :- This function is used to check if obj2 in present in obj1
Operation – obj2 in obj1
 

Python3

# Python code to demonstrate working of 
# concat() and contains()
  
# importing operator module 
import operator
  
# Initializing string 1
s1 = "geeksfor"
  
# Initializing string 2
s2 = "geeks"
  
# using concat() to concatenate two strings
print ("The concatenated string is : ",end="")
print (operator.concat(s1,s2))
  
# using contains() to check if s1 contains s2
if (operator.contains(s1,s2)):
       print ("geeksfor contains geeks")
else : print ("geeksfor does not contain geeks")

                    

Output: 
 

The concatenated string is : geeksforgeeks
geeksfor contains geeks


 9. and_(a,b) :- This function is used to compute bitwise and of the mentioned arguments. 
Operation – a & b

10. or_(a,b) :- This function is used to compute bitwise or of the mentioned arguments. 
Operation – a | b

11. xor(a,b) :- This function is used to compute bitwise xor of the mentioned arguments. 
Operation – a ^ b

12. invert(a) :- This function is used to compute bitwise inversion of the mentioned argument. 
Operation – ~ a
 

Python3

# Python code to demonstrate working of 
# and_(), or_(), xor(), invert()
  
# importing operator module 
import operator
  
# Initializing a and b
  
a = 1
  
b = 0
  
# using and_() to display bitwise and operation
print ("The bitwise and of a and b is : ",end="")
print (operator.and_(a,b))
  
# using or_() to display bitwise or operation
print ("The bitwise or of a and b is : ",end="")
print (operator.or_(a,b))
  
# using xor() to display bitwise exclusive or operation
print ("The bitwise xor of a and b is : ",end="")
print (operator.xor(a,b))
  
# using invert() to invert value of a
operator.invert(a)
  
# printing modified value
print ("The inverted value of a is : ",end="")
print (operator.invert(a))

                    

Output: 
 

The bitwise and of a and b is : 0
The bitwise or of a and b is : 1
The bitwise xor of a and b is : 1
The inverted value of a is : -2




 



Last Updated : 15 Jul, 2022
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