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=======

CHANGES

=======

-----

0.10.0

-----

The dalton has been added as an alias for the unified atomic mass

unit, in response to the 2005 IUPAP report recognizing that both

terms should be officially recognized. Da is recognized as the symbol

for the dalton.

The test suite has been refactored to use the unittest package

provided by the python-2.7 and python-3.2 standard library. With

python-2.6 or python-3.{0,1}, unittest2 is required. The test suite

is run with::

python setup.py test

Quantities no longer requires or uses Distribute or Setuptools.

-----

0.9.0

-----

Numpy-1.4.0 or later is also required, in order to properly handle

units during in-place arithmetic.

Physical constants are now instances of Quantity, rather than

UncertainQuantity. Development on UncertainQuantity is not as

advanced, so hopefully this change will make the constants package

more robust.

Bugs fixed

**********

* #1 use revolution/min instead of 1/min as definition of rpm

* #2 silently fail to import test runner if nose is not installed

* #4 remove the "jiffy", as there are conflicting definitions

depending on (or even within a) discipline.

* #5 fix the definition of femtometer

-----

0.8.0

-----

Quantities now requires Python-2.6 or later. Python-3 is supported.

The fill method, and __setitem__ methods will now accept scalar

values in addition to quantities. If a scalar is passed, an

assumption is made that the change should only be applied to the

quantity's magnitude. The fill method will also accept a quantity

with incompatible units, and will overwrite the previous units.

The log and exp functions have been removed. Quantities will work

with numpy's version of these functions.

Quantities development has migrated from bzr/launchpad to

git/github. Please report problems to

http://github.com/python-quantities/python-quantities or visit the

mailing list at http://groups.google.com/group/python-quantities

Bugs fixed

**********

* #501563 incorrect conversion ratio for gills/pints

* #515314 don't memoize simplified, fixes set_default_units

* #526008 add definition of stone, used in UK to measure mass

* #525991 support specifying units using unicode

* #529266 fix conversion to gallons

-----

0.7.0

-----

A critical problem was identified, caused by a conflict between farad

and Faraday identified in quantities <0.7. F is commonly used as a

symbol for both the farad and Faraday's constant. This is problematic

for quanitities, which registers its units so they can be accessed

using a string corresponding to the unit name or symbol. In this

case, the Faraday constant was registered after the farad, so any

quantity that was expressed in terms of farads would be incorrectly

simplified using the Faraday constant. This problem has been fixed

and the registry has been improved to prevent overwriting previously

registered names or symbols. F is now reserved for the farad.

Addition and subtraction of quantities with different but compatible

units is now supported. Additionally, changes have been made in the

forthcoming numpy-1.4.0 to extend this compatibility to other ufuncs

as well.

Numpydoc, an external package developed to extend Sphinx for the

numpy documentation project, is now required to build quantities'

documentation.

Bugs fixed

**********

* #495181 epsilon_0 simplifies incorrectly

* #490323 bad spelling for polarizabilities