localhost:/tmp/root/spack-stage/spack-stage-py-numcodecs-0.7.3-mdm2ofae7zyu6ymyvqmhpiixwjcfjqpa/spack-src #spack load py-numcodecs@0.7.3
localhost:/tmp/root/spack-stage/spack-stage-py-numcodecs-0.7.3-mdm2ofae7zyu6ymyvqmhpiixwjcfjqpa/spack-src #spack load py-pip
localhost:/tmp/root/spack-stage/spack-stage-py-numcodecs-0.7.3-mdm2ofae7zyu6ymyvqmhpiixwjcfjqpa/spack-src # ls
CODE_OF_CONDUCT.md  MANIFEST.in  README.rst   adhoc  build.cmd  cpuinfo.py  fixture    numcodecs           pytest.ini        requirements_dev.txt   requirements_test.txt  setup.py
LICENSE             PKG-INFO     __pycache__  build  c-blosc    docs        notebooks  numcodecs.egg-info  requirements.txt  requirements_rtfd.txt  setup.cfg              tox.ini
localhost:/tmp/root/spack-stage/spack-stage-py-numcodecs-0.7.3-mdm2ofae7zyu6ymyvqmhpiixwjcfjqpa/spack-src #pip install -r requirements.txt
localhost:/tmp/root/spack-stage/spack-stage-py-numcodecs-0.7.3-mdm2ofae7zyu6ymyvqmhpiixwjcfjqpa/spack-src #pip install -r requirements_test.txt
localhost:/tmp/root/spack-stage/spack-stage-py-numcodecs-0.7.3-mdm2ofae7zyu6ymyvqmhpiixwjcfjqpa/spack-src #python setup.py test
localhost:/tmp/root/spack-stage/spack-stage-py-numcodecs-0.7.3-mdm2ofae7zyu6ymyvqmhpiixwjcfjqpa/spack-src #pytest           
……
    from numcodecs.zlib import Zlib
numcodecs/zlib.py:5: in <module>
    from .compat import ndarray_copy, ensure_contiguous_ndarray
numcodecs/compat.py:7: in <module>
    import numpy as np
E   ModuleNotFoundError: No module named 'numpy'
_________________________________________________________________________________ ERROR collecting numcodecs/tests/test_zlib.py _________________________________________________________________________________
ImportError while importing test module '/tmp/root/spack-stage/spack-stage-py-numcodecs-0.7.3-mdm2ofae7zyu6ymyvqmhpiixwjcfjqpa/spack-src/numcodecs/tests/test_zlib.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/home/spack/opt/spack/linux-sles15-aarch64/gcc-7.4.0/python-3.7.7-tmyoucv3qh4ffcqbrqc7wcehar7a2n3w/lib/python3.7/importlib/__init__.py:127: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
numcodecs/__init__.py:27: in <module>
    from numcodecs.zlib import Zlib
numcodecs/zlib.py:5: in <module>
    from .compat import ndarray_copy, ensure_contiguous_ndarray
numcodecs/compat.py:7: in <module>
    import numpy as np
E   ModuleNotFoundError: No module named 'numpy'
_________________________________________________________________________________ ERROR collecting numcodecs/tests/test_zstd.py _________________________________________________________________________________
ImportError while importing test module '/tmp/root/spack-stage/spack-stage-py-numcodecs-0.7.3-mdm2ofae7zyu6ymyvqmhpiixwjcfjqpa/spack-src/numcodecs/tests/test_zstd.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/home/spack/opt/spack/linux-sles15-aarch64/gcc-7.4.0/python-3.7.7-tmyoucv3qh4ffcqbrqc7wcehar7a2n3w/lib/python3.7/importlib/__init__.py:127: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
numcodecs/__init__.py:27: in <module>
    from numcodecs.zlib import Zlib
numcodecs/zlib.py:5: in <module>
    from .compat import ndarray_copy, ensure_contiguous_ndarray
numcodecs/compat.py:7: in <module>
    import numpy as np
E   ModuleNotFoundError: No module named 'numpy'
============================================================================================ short test summary info ============================================================================================
ERROR numcodecs/tests/test_astype.py
ERROR numcodecs/tests/test_base64.py
ERROR numcodecs/tests/test_blosc.py
ERROR numcodecs/tests/test_bz2.py
ERROR numcodecs/tests/test_categorize.py
ERROR numcodecs/tests/test_checksum32.py
ERROR numcodecs/tests/test_compat.py
ERROR numcodecs/tests/test_delta.py
ERROR numcodecs/tests/test_fixedscaleoffset.py
ERROR numcodecs/tests/test_gzip.py
ERROR numcodecs/tests/test_json.py
ERROR numcodecs/tests/test_lz4.py
ERROR numcodecs/tests/test_lzma.py
ERROR numcodecs/tests/test_msgpacks.py
ERROR numcodecs/tests/test_packbits.py
ERROR numcodecs/tests/test_pickles.py
ERROR numcodecs/tests/test_quantize.py
ERROR numcodecs/tests/test_registry.py
ERROR numcodecs/tests/test_vlen_array.py
ERROR numcodecs/tests/test_vlen_bytes.py
ERROR numcodecs/tests/test_vlen_utf8.py
ERROR numcodecs/tests/test_zlib.py
ERROR numcodecs/tests/test_zstd.py
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 23 errors during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

localhost:/tmp/root/spack-stage/spack-stage-py-numcodecs-0.7.3-mdm2ofae7zyu6ymyvqmhpiixwjcfjqpa/spack-src # spack edit py-numcodecs
# Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)

from spack import *


class PyNumcodecs(PythonPackage):
    """Numcodecs is a Python package providing buffer compression and
    transformation codecs for use in data storage and communication
    applications.
    """

    homepage = "https://github.com/zarr-developers/numcodecs"
    url      = "https://pypi.io/packages/source/n/numcodecs/numcodecs-0.6.4.tar.gz"

    version('0.7.3', sha256='022b12ad83eb623ec53f154859d49f6ec43b15c36052fa864eaf2d9ee786dd85')
    version('0.6.4', sha256='ef4843d5db4d074e607e9b85156835c10d006afc10e175bda62ff5412fca6e4d')

    variant('msgpack', default=False, description='Codec to encode data as msgpacked bytes.')

    depends_on('py-setuptools@18.0:',       type='build')
    depends_on('py-setuptools-scm@1.5.4:',  type=('build', 'run'))
    depends_on('py-numpy@1.7:',             type=('build', 'run'))
    depends_on('py-msgpack', type=('build', 'run'), when='+msgpack')