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The Danger of Overusing "is" Instead of "==" in Python
If you've been working with Python for a while, you've probably used both is and == in your code. They look similar, they even read similarly. But underneath the hood, they do very different things. And using is when you meant to use == can lead to subtle, nasty bugs that are incredibly hard to track down. What's the Difference Between is and ==? == checks if two values are equal. is checks if two variables point to the same object in memory. Here’s a simple way to remember it:
If you've been working with Python for a while, you've probably used both is and == in your code. They look similar, they even read similarly. But underneath the hood, they do very different things. And using is when you meant to use == can lead to subtle, nasty bugs that are incredibly hard to track down.
What's the Difference Between is and ==?
-
==checks if two values are equal. -
ischecks if two variables point to the same object in memory.
Here’s a simple way to remember it:
