pass — Advanced Playground

A no-op placeholder; does nothing, used where syntax requires a statement

Python Playground

# Empty class as a namespace
class Config:
    pass

Config.debug = True
Config.version = "1.0"
Config.max_retries = 3

print(vars(Config))

# Pass in conditional class body
def make_class(with_method):
    class Result:
        if with_method:
            def greet(self):
                return "Hello!"
        else:
            pass
    return Result

WithGreet = make_class(True)
WithoutGreet = make_class(False)
print(WithGreet().greet())
print(hasattr(WithoutGreet(), "greet"))

Output

Click "Run" to execute your code

pass is occasionally needed in dynamic class construction where conditional blocks in the class body might be empty.

Challenge

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

View all Advanced examples for pass