The PEP says:
Omitting the parentheses from this PEP's proposed syntax introduces many syntactic ambiguities.


As the name's scope extends to the full current statement, even a block statement, this can be used to good effect in the header of an if or while statement

Will the `from ... import ... as ... statement be a special case, because currently the following form is valid:

from math import (tau as two_pi) 

With kind regards,