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 listli = [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 positionoperator.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 indexoperator.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 elementprint ("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 listli = [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 indexoperator.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 indexoperator.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 elementprint ("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 1s1 = "Lazyroarfor" # Initializing string 2s2 = "Lazyroar" # using concat() to concatenate two stringsprint ("The concatenated string is : ",end="")print (operator.concat(s1,s2)) # using contains() to check if s1 contains s2if (operator.contains(s1,s2)): print ("Lazyroarfor contains Lazyroar")else : print ("Lazyroarfor does not contain Lazyroar") |
Output:
The concatenated string is : neveropen Lazyroarfor contains Lazyroar
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 operationprint ("The bitwise and of a and b is : ",end="")print (operator.and_(a,b)) # using or_() to display bitwise or operationprint ("The bitwise or of a and b is : ",end="")print (operator.or_(a,b)) # using xor() to display bitwise exclusive or operationprint ("The bitwise xor of a and b is : ",end="")print (operator.xor(a,b)) # using invert() to invert value of aoperator.invert(a) # printing modified valueprint ("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
This article is contributed by Manjeet Singh. If you like Lazyroar and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to review-team@geeksforgeeks.org. See your article appearing on the Lazyroar main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
