Я использую MacOs Sierra 10.12.6, когда я хочу установить Tox
(https://tox.readthedocs.io/en/latest/install.html).
~ $ pip install tox
Collecting tox
Could not fetch URL https://pypi.python.org/simple/tox/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) - skipping
Could not find a version that satisfies the requirement tox (from versions: )
No matching distribution found for tox
~ $
Как мне установить Tox?