format() — Advanced Playground

Formats a value according to a format specification string

Python Playground

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

obj = Custom()
print(format(obj))

Output

Click "Run" to execute your code

Understanding the dunder methods that format() 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?