eval() — Advanced Playground

Evaluates a string as a Python expression and returns the result

Python Playground

# eval() - implementing the protocol
class Custom:
    def __eval__(self):
        return "custom result"

obj = Custom()
print(eval(obj))

Output

Click "Run" to execute your code

Understanding the dunder methods that eval() calls helps you customize behavior for your own classes.

Try modifying the code above to explore different behaviors. Can you extend the example to handle a new use case?