v0.1.1

[0.1.1] - 2025-10-25

Added

• Added Python 3.13 and 3.14 classifiers to pyproject.toml for up-to-date Python version metadata. [#86, thanks @OnatadeTobi]

Fixed

• Prevented registration or aliasing of unit names that conflict with existing UnitNamespace attributes or methods (e.g., define, __init__, _reserved_names), ensuring consistent and unambiguous behavior when defining units. #69
• Added _reserved_names declaration inside UnitNamespace and post-class initialization to correctly include it in reserved name checks. #69
• Updated UnitsRegistry.register(), register_alias(), and UnitNamespace.define() to raise clear ValueError messages when attempting to register conflicting names. #69

v0.1.0

[0.1.0] - 2025-10-24

Breaking Change

• Removed old get_unit() function and introduced new UnitRegistry class with register(), register_alias(), has(), get(), all() functions.
• Replaced the @ operator (4 @ unit) with the standard multiplication operator (4 * unit) for creating quantities.

Added

• Support for unit algebra: units can now be combined using multiplication (*), division (/), and exponentiation (**) to produce new derived units with correct dimensional analysis (e.g., m/s, m^2, N·m, etc.).

• Added common time units (min, h, d, wk, fortnight, mo, yr, yr_julian, decade, century, millennium) with full alias support and SI-based scaling in Default Registry.

• Added .si property to a quantity to convert any quantity to its respective SI unit.

• Added support for formatted string output of quantities using the __format__ method.
  Quantities can now be printed in their current or SI units directly in f-strings:

  • f"{q}" or f"{q:native}" → displays the quantity in its current unit.
  • f"{q:si}" → displays the quantity converted to SI units.
    This provides a cleaner and more Pythonic way to print quantities without calling .to_si() manually.

• Units and quantities now support string-based compound expressions in .get() and .to() (e.g., "m/s**2", "(W*s)/(N*s/m**2)", "1/s"), enabling intuitive text-based conversions and registry lookups for mixed or derived units.

• Added UnitNamespace to provide a user-friendly interface for accessing units.

• Added full set of comparison operators (==, !=, <, <=, >, >=) to the Quantity class. Equality comparisons (==, !=, <=, >=) automatically account for small floating-point rounding errors.

• Added .as_key(precision=12) method to Quantity to provide a safe, explicit way to create hashable keys for use in dictionaries and sets.

v0.0.1a0

What's Changed

• Initial alpha release of Quantium.
• Core support for unit-safe mathematical calculations.
• get_unit() API for creating and combining physical units.
• Basic arithmetic operations between unit quantities (+, -, *, /, **).
• String representation of unit results (e.g., 10 m/s).

Notes

• NumPy interoperability is not yet supported but planned for future versions.