"cannot import name '_math'" problem about probreg

[neka-nat]

Thank you for reporting.
If possible, can I see the terminal log during installation and running the test?

[onceforall]

The test log as follows:
Testing started at 22:54 ...
D:\python3.5\python.exe "D:\PyCharm 2017.3.4\helpers\pycharm_jb_unittest_runner.py" --path E:/pychrm-projects/probreg-master/tests/test_cpd.py
Launching unittests with arguments python -m unittest E:/pychrm-projects/probreg-master/tests/test_cpd.py in E:\pychrm-projects\probreg-master\tests

Ran 1 test in 0.000s

FAILED (errors=1)

Error
Traceback (most recent call last):
File "D:\python3.5\lib\unittest\case.py", line 59, in testPartExecutor
yield
File "D:\python3.5\lib\unittest\case.py", line 605, in run
testMethod()
File "D:\python3.5\lib\unittest\loader.py", line 34, in testFailure
raise self._exception
ImportError: Failed to import test module: test_cpd
Traceback (most recent call last):
File "D:\python3.5\lib\unittest\loader.py", line 153, in loadTestsFromName
module = import(module_name)
File "E:\pychrm-projects\probreg-master\tests\test_cpd.py", line 5, in
from probreg import cpd
File "E:\pychrm-projects\probreg-master\probreg\cpd.py", line 8, in
from . import transformation as tf
File "E:\pychrm-projects\probreg-master\probreg\transformation.py", line 5, in
from . import math_utils as mu
File "E:\pychrm-projects\probreg-master\probreg\math_utils.py", line 3, in
from . import _math
ImportError: cannot import name '_math'

[neka-nat]

Did you execute the following command after cloning from git?

git clone https://github.com/neka-nat/probreg.git --recursive
cd probreg
pip install -e .

Please execute this and then test.