- Allow primary argument of *Quantity.is_close()* and *Quantity.add()* to be a string.
2.13
- Allow currency symbols in compound units (ex: $/oz or lbs/$).
2.12
- Allow currency symbols in compound units (ex: $/oz or lbs/$).
2.11
- Dropping support for all versions of Python older than 3.5. - Added *sia* form (ASCII only SI scale factors). - Added *only_e_notation* argument to Quantity.all_from_conv_fmt(). - Added Quantity.reset_prefs() method.
2.10
- Added *negligible*, *tight_units*, *nan*, and *inf* preferences. - Added *negligible* argument to render. - Added *infinity_symbol* attribute. - Changed the return values for Quantity.is_nan() and Quantity.is_infinite().
2.9
- Made Quantity.extract() more forgiving. - Support radix and comma processing when converting strings to Quantity.