python - Import __future__ division does only work if not imported from another file -

this works: (result = 0.01)

from __future__ import division  def division_test():     print 10/1000  division_test()

this not: (result = 0)

file a:

from __future__ import division

file b:

from import *  def division_test():     print 10/1000  division_test()

why? if put things

import numpy np

into file a, can import file b same way , working time.

__future__ imports not quite same others. per the documentation (emphasis mine):

[__future__] allows use of new features on per-module basis before release in feature becomes standard.

My