Quantity.default_format not initialised

[andrewgsavage]

https://github.com/hgrecco/pint-pandas/actions/runs/8823901297/job/24225328915?pr=226#step:11:2900
Quantity.default_format is no longer initialised causing a pint-pandas test to fail, probably since #1457 or #1503 ?

>>> ureg = pint.UnitRegistry()
>>> q = ureg.Quantity(1.25, "m ** 2 / s ** 2")
>>> q.default_format
Traceback (most recent call last):
  File "D:\repos\pint\pint\facets\numpy\quantity.py", line 248, in __getattr__
    return getattr(self._magnitude, item)
AttributeError: 'float' object has no attribute 'default_format'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "D:\repos\pint\pint\facets\numpy\quantity.py", line 250, in __getattr__
    raise AttributeError(
AttributeError: Neither Quantity object nor its magnitude (1.25) has attribute 'default_format'
>>> ureg.default_format = "~P"
<stdin>:1: DeprecationWarning: This function will be removed in future versions of pint.
Use ureg.formatter.default_format
>>> q.default_format
Traceback (most recent call last):
  File "D:\repos\pint\pint\facets\numpy\quantity.py", line 248, in __getattr__
    return getattr(self._magnitude, item)
AttributeError: 'float' object has no attribute 'default_format'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "D:\repos\pint\pint\facets\numpy\quantity.py", line 250, in __getattr__
    raise AttributeError(
AttributeError: Neither Quantity object nor its magnitude (1.25) has attribute 'default_format'
>>> q.default_format = ".3fP"
>>> q.default_format
'.3fP'

Should I change the pint-pandas test/behaviour, or was this unintentional?

[andrewgsavage]

ah I'd missed DeprecationWarning: This function will be removed in future versions of pint. Use ureg.formatter.default_format