Python s is and is not operators
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the `is` and `is not` operators in python are used to compare whether two variables point to the same object in memory, rather than comparing their values. these operators are often used to check if two variables refer to the exact same object or if they are different instances.
here is a breakdown of how `is` and `is not` operators work:
the `is` operator returns `true` if both variables point to the same object in memory.
the `is not` operator returns `true` if the variables do not point to the same object in memory.
it is important to note that using `is` and `is not` with mutable objects like lists or dictionaries may yield unexpected results, as these objects can be modified in place.
here is an example to illustrate the usage of `is` and `is not` operators:
in the first example, `x` and `y` are assigned different list objects with the same values, so `x is y` will return `false`. in the second example, `b` is assigned to the same list object as `a`, so `a is b` will return `true`.
remember to use `is` and `is not` operators with caution, especially when dealing with mutable objects, as their behavior may not always be as expected.
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