This is what you need if you want to compare whether or not two objects have the same contents, and you don’t care about where they’re stored in memory. Here, you’re generally comparing the value of two objects. Use the Python = and != operators to compare object equality. Remove ads Comparing the Python Comparison OperatorsĪs a rule of thumb, you should always use the equality operators = and !=, except when you’re comparing to None:
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How to write a custom _eq_() class method to define equality operator behavior.Why using is and is not to compare values leads to unexpected behavior.
What these Python operators do under the hood. When to use equality and identity operators to compare objects. What the difference is between object equality and identity. In the vast majority of cases, this means you should use the equality operators = and !=, except when you’re comparing to None. The = operator compares the value or equality of two objects, whereas the Python is operator checks whether two variables point to the same object in memory. However, it’s crucial to keep in mind that these operators don’t behave quite the same. You might have heard somewhere that the Python is operator is faster than the = operator, or you may feel that it looks more Pythonic. Your code can run fine when you use the Python is operator to compare numbers, until it suddenly doesn’t. There’s a subtle difference between the Python identity operator ( is) and the equality operator ( =). Watch it together with the written tutorial to deepen your understanding: Comparing Python Objects the Right Way: "is" vs "=" Watch Now This tutorial has a related video course created by the Real Python team.
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