falsifier¶

🎭 A very simple Python library package which provides a base class for falsey objects - objects that evaluate to False in boolean contexts.

Installation 📦¶

Install via uv pip command:

uv pip install falsifier

Or, install via pip:

pip install falsifier

Examples 💡¶

The Falsifier class provides a base for creating objects that evaluate to False in boolean contexts:

>>> from falsifier import Falsifier
>>> obj = Falsifier( )
>>> bool( obj )
False

Identity-based equality ensures each instance is only equal to itself:

>>> obj2 = Falsifier( )
>>> obj == obj2
False
>>> obj == obj
True

Subclass to create domain-specific falsey types:

>>> class AbsentValue( Falsifier ):
...     ''' Represents an explicitly absent value. '''
...     def __str__( self ) -> str:
...         return 'absent'
>>> absent = AbsentValue( )
>>> bool( absent )
False

See documentation/examples/objects.rst for more patterns, including singletons and collection usage.

Use Cases 🎯¶

🚩 Sentinel Objects: Base class for creating unique sentinel objects that evaluate to False.
🕳️ Absence Indicators: Foundation for creating objects that represent absence or invalidity when None or False may be valid.

Contribution 🤝¶

Contribution to this project is welcome! However, it must follow the code of conduct for the project.

Please file bug reports and feature requests in the issue tracker or submit pull requests to improve the source code or documentation.

For development guidance and standards, please see the development guide.

Additional Indicia¶

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