メッセージ
Command "/usr/bin/python3 -u -c "import setuptools, tokenize;__file__
='/tmp/pip-build-1zxgesds/psutil/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-4_6kb2qn-record/install-record.txt --single-version-externally-
managed --compile" failed with error code 1 in /tmp/pip-build-1zxgesds/
psutil/
解決策
-Uオプションを付ける
そういうもんですかね？
pip install -U psutil