27 lines
665 B
Markdown
27 lines
665 B
Markdown
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---
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title: Difference between Python 'is' and '==' operators
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---
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`is` is a check for object identity - ie, checking if two or more variables are referring to the same object. You can't overload `is`.
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`==` evaluates to true if object referred to by the variables are equal. You can overload `==` via the `__eq__` operator.
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## Return Value
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The return value for both would be either `True` or `False`.
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## Code Sample
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a = 2.3
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a is 2.3 # => False
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a == 2.3 # => True
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a = [234,123,321]
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b = [234,123,321]
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a == b # => True
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a is b # => False
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a = b
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a == b # => True
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a is b # => True, because if we change a, b changes too
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