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- PrefixUnit

# PrefixUnit

class `astropy.units.core.``PrefixUnit`(st, represents=None, register=None, doc=None, format=None, namespace=None)

  Bases: `astropy.units.core.Unit`

  A unit that is simply a SI-prefixed version of another unit.

  For example, `mm` is a `PrefixUnit` of `.001 * m`.

  The constructor is the same as for `Unit`.