What does the / sign means in the signature of numpy functions? The / sign appears between the positional and keword arguments.
For example:
sqrt(x, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature, extobj])
power(x1, x2, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, subok=True[, signature, extobj])
Online documentation of numpy.sqrt -- and numpy.power functions.