try:
    import os
except ImportError:
    exit(0)

import test1

assert test1.add(1, 2) == 13

from test2.a.g import get_value
assert get_value() == '123'

import test2
assert test2.a.g.get_value() == '123'

from test2.utils import get_value_2
assert get_value_2() == '123'

from test3.a.b import value
# should test3
assert value == 1