Margaret posted

double equals vs is in python

chirag
answered Feb 25 '23 00:00

In Python , the == (double equals) operator and the is operator are used to compare objects , but they have different functionalities.

The == operator is used to compare the values of two objects . It checks if the values of the objects are the same , even if the objects are of different types. For example:


a = 10
b = 10.0

if a == b:
    print("a and b have the same value")
else:
    print("a and b do not have the same value")

In this example, the == operator checks if the values of a and b are the same, and because they are, the program prints "a and b have the same value".

On the other hand, the is operator is used to compare the identities of two objects. It checks if the two objects are actually the same object in memory . For example:



a = [1, 2, 3]
b = [1, 2, 3]

if a is b:
    print("a and b are the same object")
else:
    print("a and b are not the same object")

In this example, the is operator checks if a and b are actually the same object in memory, which they are not, so the program prints "a and b are not the same object".

In general, you should use the == operator to compare values , and the is operator to compare identities . However, be careful when comparing mutable objects (such as lists and dictionaries), because their values can change even if their identities remain the same. In such cases, it may be safer to use the == operator instead of the is operator.

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Margaret posted

double equals vs is in python

chirag answered Feb 25 '23 00:00

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chirag
answered Feb 25 '23 00:00