__all__ — Easy Examples

List of public names exported by a module with 'from module import *'

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Accessing __all__

How to access and use __all__.

python
# __all__ controls what 'from module import *' exports
# In a module, you would define:
# __all__ = ["public_func", "PublicClass"]
print("__all__ is typically defined at module level")
print("It restricts star imports to listed names only")
import math
print(hasattr(math, "__all__"))

__all__ is a special attribute that list of public names exported by a module with 'from module import *'.

__all__ in practice

Using __all__ in everyday code.

python
# More __all__ examples
print("__all__ is a special Python attribute")

# Every object has certain dunder attributes
obj = object()
attrs = [a for a in dir(obj) if a.startswith("__")]
print(f"object has {len(attrs)} dunder attributes")

Understanding __all__ helps you introspect and debug Python objects.

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