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Inplace Operators in Python | Set 1 (iadd(), isub(), iconcat()…)
  • Difficulty Level : Easy
  • Last Updated : 10 Feb, 2020

Python in its definition provides methods to perform inplace operations, i.e doing assignment and computation in a single statement using “operator” module. For example,

x += y is equivalent to x = operator.iadd(x, y) 

Some Important Inplace operations :

1. iadd() :- This function is used to assign and add the current value. This operation does “a+=b” operation. Assigning is not performed in case of immutable containers, such as strings, numbers and tuples.

2. iconcat() :- This function is used to concat one string at end of second.




# Python code to demonstrate the working of 
# iadd() and iconcat()
  
# importing operator to handle operator operations
import operator
  
# using iadd() to add and assign value
x = operator.iadd(2, 3);
  
# printing the modified value
print ("The value after adding and assigning : ", end="")
print (x)
  
# initializing values
y = "geeks"
  
z = "forgeeks"
  
# using iconcat() to concat the sequences
y = operator.iconcat(y, z)
  
# using iconcat() to concat sequences 
print ("The string after concatenation is : ", end="")
print (y)

Output:



The value after adding and assigning : 5
The string after concatenation is : geeksforgeeks

3. isub() :- This function is used to assign and subtract the current value. This operation does “a-=b” operation. Assigning is not performed in case of immutable containers, such as strings, numbers and tuples.

4. imul() :- This function is used to assign and multiply the current value. This operation does “a*=b” operation. Assigning is not performed in case of immutable containers, such as strings, numbers and tuples.




# Python code to demonstrate the working of 
# isub() and imul()
  
# importing operator to handle operator operations
import operator
  
# using isub() to subtract and assign value
x = operator.isub(2, 3);
  
# printing the modified value
print ("The value after subtracting and assigning : ", end="")
print (x)
  
# using imul() to multiply and assign value
x = operator.imul(2, 3);
  
# printing the modified value
print ("The value after multiplying and assigning : ", end="")
print (x)

Output:

The value after subtracting and assigning : -1
The value after multiplying and assigning : 6

5. itruediv() :- This function is used to assign and divide the current value. This operation does “a/=b” operation. Assigning is not performed in case of immutable containers, such as strings, numbers and tuples.

6. imod() :- This function is used to assign and return remainder . This operation does “a%=b” operation. Assigning is not performed in case of immutable containers, such as strings, numbers and tuples.




# Python code to demonstrate the working of 
# itruediv() and imod()
  
# importing operator to handle operator operations
import operator
  
# using itruediv() to divide and assign value
x = operator.itruediv(10, 5);
  
# printing the modified value
print ("The value after dividing and assigning : ", end="")
print (x)
  
# using imod() to modulus and assign value
x = operator.imod(10, 6);
  
# printing the modified value
print ("The value after modulus and assigning : ", end="")
print (x)

Output:

The value after dividing and assigning : 2.0
The value after modulus and assigning : 4

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