travis CI build error [numpy]

[Tych0n]

in Pull request #179,

travis build failed for linux (3/3) and OSX (1/2) because of numpy import error.
travis log #5.3

// from line 662
copying build/lib.linux-x86_64-3.6/implicit/evaluation.cpython-36m-x86_64-linux-gnu.so -> implicit
Traceback (most recent call last):
  File "setup.py", line 163, in <module>
...
// from line 698
  File "/home/travis/build/Tych0n/implicit/implicit/als.py", line 8, in <module>
    import numpy as np
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/numpy/__init__.py", line 142, in <module>
    from . import core
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/numpy/core/__init__.py", line 57, in <module>
    from . import numerictypes as nt
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/numpy/core/numerictypes.py", line 111, in <module>
    from ._type_aliases import (
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/numpy/core/_type_aliases.py", line 63, in <module>
    _concrete_types = {v.type for k, v in _concrete_typeinfo.items()}
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/numpy/core/_type_aliases.py", line 63, in <setcomp>
    _concrete_types = {v.type for k, v in _concrete_typeinfo.items()}
AttributeError: 'tuple' object has no attribute 'type'

last successful travis build log #333.3 goes like

// from line 690
copying build/lib.linux-x86_64-3.6/implicit/evaluation.cpython-36m-x86_64-linux-gnu.so -> implicit
test_dtype (tests.approximate_als_test.AnnoyALSTest) ... WARNING:root:OpenBLAS detected. Its highly recommend to set the environment variable 'export OPENBLAS_NUM_THREADS=1' to disable its internal multithreading
ok
test_evaluation (tests.approximate_als_test.AnnoyALSTest) ... ok

thanks

[Tych0n]

Fixed in 3efb9aa. Travis VM launches with preinstalled numpy, and when implicit is gitcheckedout and installed, Travis installs one more numpy and crashes while trying to import them both (https://travis-ci.org/Tych0n/implicit/jobs/512711668#L695). Solution is to delete Travis numpy before any implicit installation.

[ita9naiwa]

Thanks! I fixed the problem.
is it Okay to do it like this anyway? #213