math.copysign() is not a function (missing?)

[chopin]

Is math.copysign() missing in Transcrypt?

in Python3.9.18:

>>> import math
>>> math.copysign(1, 434)
1.0
>>> math.copysign(1, -434)
-1.0

Transcrypted: Uncaught TypeError: math.copysign is not a function