set_enabled_aliases

astropy.units.set_enabled_aliases(aliases)

Set aliases for units.

This is useful for handling alternate spellings for units, or misspelled units in files one is trying to read.

Parameters:

aliasesdict of str, Unit

The aliases to set. The keys must be the string aliases, and values must be the astropy.units.Unit that the alias will be mapped to.

Raises:

ValueError

If the alias already defines a different unit.

Examples

To temporarily allow for a misspelled ‘Angstroem’ unit:

>>> from astropy import units as u
>>> with u.set_enabled_aliases({'Angstroem': u.Angstrom}):
...     print(u.Unit("Angstroem", parse_strict="raise") == u.Angstrom)
True