Description
Testing the 6.0rc1, there was a change in behavior for adding empty quantities to time:
5.x:
>>> Time.now() + [] * u.s
<Time object: scale='utc' format='datetime' value=[]>
6.0 raises an error that is misleading, as the problem is the dimensionality of the quantity, not the missing function implementation:
>>> Time.now() + [] * u.s
Traceback (most recent call last):
File "/home/maxnoe/.local/conda/envs/astropy5/lib/python3.11/site-packages/astropy/units/quantity_helper/converters.py", line 196, in converters_and_unit
if can_have_arbitrary_unit(args[i]):
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/maxnoe/.local/conda/envs/astropy5/lib/python3.11/site-packages/astropy/units/quantity_helper/converters.py", line 138, in can_have_arbitrary_unit
return np.all(np.logical_or(np.equal(value, 0.0), ~np.isfinite(value)))
^^^^^^^^^^^^^^^^^^
TypeError: ufunc 'isfinite' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/maxnoe/.local/conda/envs/astropy5/lib/python3.11/site-packages/astropy/units/quantity.py", line 691, in __array_ufunc__
raise e
File "/home/maxnoe/.local/conda/envs/astropy5/lib/python3.11/site-packages/astropy/units/quantity.py", line 636, in __array_ufunc__
converters, unit = converters_and_unit(function, method, *inputs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/maxnoe/.local/conda/envs/astropy5/lib/python3.11/site-packages/astropy/units/quantity_helper/converters.py", line 207, in converters_and_unit
raise TypeError(
TypeError: Unsupported operand type(s) for ufunc add: 'Time,Quantity'
Expected behavior
Either stick with the 5.x behavior (empty time object) or raise a more helpful error message.
How to Reproduce
Versions
astropy 6.0.0rc1
Description
Testing the 6.0rc1, there was a change in behavior for adding empty quantities to time:
5.x:
6.0 raises an error that is misleading, as the problem is the dimensionality of the quantity, not the missing function implementation:
Expected behavior
Either stick with the 5.x behavior (empty time object) or raise a more helpful error message.
How to Reproduce
Versions
astropy 6.0.0rc1