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What is the difference between '==' and 'is'?

Q: What is the difference between '==' and 'is'?

**`==`** checks value equality (calls `__eq__`); **`is`** checks identity (same object in memory). Use `==` to compare values and `is` only for singletons like `None` (`x is None`). Small ints and interned strings may share identity, which can mislead.

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Compare equality and identity.

isequality

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== checks value equality (calls __eq__); is checks identity (same object in memory). Use == to compare values and is only for singletons like None (x is None). Small ints and interned strings may share identity, which can mislead.

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PYValue vs identity, plus the small-int interning trap

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