2 Types of Identity Operators in Python 3
Identity operators in Python are used to verify whether two variables refer to same memory location or not.
They are of two types:
| Operator | Description | Example |
| is | It returns true if two variables refer to same memory location. | a=10 b=10 print(a is b)Output is True as id(a) is same as id(b) as they both refer to same value 10. |
| is not | It returns true if two variables don’t refer to same memory location. | a=10 b=10 print(a is not b) |
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Output is False as id(a) is same as id(b). Output will be True only if a and b both contain different values. |
Program to demonstrate Identity Operators |
Output |
a=10 b=10 print(a is b) print(a is not b) |
True False |
Examples:
A=10
B=10
A is B will return True because both A and B are referencing memory address of value 10
We can use id() function to confirm that they both are referencing same memory address.
In[1]: a=10
In[2]: id(a)
Out[2]: 1397613472
In[3]: b=20
Out[3]: 1397613632
In[4]: c=10
Out[4]: 1397613472
In[5]: a is b
Out[5]: false
#Output is False because ids of a1=10 and b=20 are different
In[6]:a is c
Out[6]:True
#Output is True because ids of a1=10 and c=10 are same .
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