I have tried pip install numpy and pip install numpy==1.13.3 and I keep getting this error:
Command "/home/pi/.virtualenvs/venv_python36/bin/python3.6 -u -c
"import setuptools,
tokenize;__file__='/tmp/pip-build-f4w3ieb6/numpy/setup.py';f=getattr(tokenize,
'open', open)(__file__);code=f.read().replace('\r\n',
'\n');f.close();exec(compile(code, __file__, 'exec'))" install
--record /tmp/pip-ngusfvpy-record/install-record.txt --single-version-externally-managed --compile --install-headers /home/pi/.virtualenvs/venv_python36/include/site/python3.6/numpy"
failed with error code 1 in /tmp/pip-build-f4w3ieb6/numpy/
It works fine on python 3.5
Full log: https://pastebin.com/Jah0FVcc (too long to post)
pip install numpy. There are more clues in there. (See for example how the output led to an answer in this post.)