截至2020年，用pypy安装scipy是可能的。（是否可以在PYPY下面安装scipy？）

pypy3 -mpip install scipy

  error: Command "g++ -pthread -DNDEBUG -O2 -fPIC -I/tmp/pip-build-env-lfdsn__t/overlay/site-packages/numpy/core/include -I/usr/lib/pypy3/include -c scipy/_lib/_uarray/_uarray_dispatch.cxx -o build/temp.linux-x86_64-3.6/scipy/_lib/_uarray/_uarray_dispatch.o -MMD -MF build/temp.linux-x86_64-3.6/scipy/_lib/_uarray/_uarray_dispatch.o.d -std=c++14 -fvisibility=hidden" failed with exit status 1


  ERROR: Failed building wheel for scipy

无法构建scipy错误：无法为使用PEP 517的scipy构建轮子，并且无法直接安装

使用--no-use-pep517选项会得到类似的结果：

    error: Command "g++ -pthread -DNDEBUG -O2 -fPIC -I/home/ezako/.local/lib/pypy3.6/site-packages/numpy/core/include -I/usr/lib/pypy3/include -c scipy/_lib/_uarray/_uarray_dispatch.cxx -o build/temp.linux-x86_64-3.6/scipy/_lib/_uarray/_uarray_dispatch.o -MMD -MF build/temp.linux-x86_64-3.6/scipy/_lib/_uarray/_uarray_dispatch.o.d -std=c++14 -fvisibility=hidden" failed with exit status 1 
ERROR: Command errored out with exit status 1: /usr/bin/pypy3 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-2ffzze2v/scipy/setup.py'"'"'; __file__='"'"'/tmp/pip-install-2ffzze2v/scipy/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-record-8avik0f1/install-record.txt --single-version-externally-managed --user --prefix= --compile --install-headers /home/ezako/.local/include/python3.6/scipy Check the logs for full command output.

Numpy已经很好地安装了PYPY3。

➜ pypy3 -V
Python 3.6.9 (7.3.0+dfsg-1~ppa1~ubuntu19.04, Dec 26 2019, 11:14:16)
[PyPy 7.3.0 with GCC 8.3.0]