What is the difference between is and == in Python?

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In Python, is and == are used for comparisons, but they serve different purposes:

== (Equality Operator)

• Checks if two variables have the same value.

• It compares the contents of the objects.

is (Identity Operator)

• Checks if two variables point to the same object in memory.

• It compares the identity of the objects, not their contents.

For small integers and some strings, Python may reuse objects for performance, making is return True. But this is an implementation detail and shouldn't be relied upon.

Summary:

• Use == to compare values.

• Use is to check object identity.

• is is often used for checking against None, like if x is None:.

Rely on == for content comparison and reserve is for identity checks.

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