Inplace Operators in Python | Set 1 (iadd(), isub(), iconcat()…)

Python in its definition provides methods to perform inplace operations, i.e. doing assignments and computations in a single statement using an operator module.

Example

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

Inplace Operators in Python

Below are some of the important Inplace operators in Python:

• iadd()
• isub()
• iconcat()
• imul()
• itruediv()
• imod()

iadd() in Python

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.

Python3

# 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)

Output

The value after adding and assigning : 5

Python iconcat()

This function is used to concat one string at end of second. In the below example, we have used iconcat() function.

Python3

# importing operator to handle operator operations
import operator

# 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 string after concatenation is : geeksforgeeks

isub() in Python

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.

Python3

# 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)

Output

The value after subtracting and assigning : -1

Inplace Operator – 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.

Python3

# importing operator to handle operator operations
import operator

# 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 multiplying and assigning : 6

Python 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.

Python3

# 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)

Output

The value after dividing and assigning : 2.0

Inplace Operator – 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.

Python3

# importing operator to handle operator operations
import operator

# 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 modulus and assigning : 4