====== pypy ======

install
<code>
V=pypy3-v5.9.0-linux64
cd /tmp
wget https://bitbucket.org/pypy/pypy/downloads/$V.tar.bz2
sudo tar -C /opt -xvf /tmp/$V.tar.bz2
sudo ln -sf /opt/$V/bin/pypy3 /usr/local/bin
</code>

create virtualenv
<code>
pypy3 -mvenv /tmp/lib
</code>