Updated Could not fetch URL https://pypi.python.org/simple/pytest-xdist/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) - skipping 出现这个错误的原因是python.org已经不支持TLSv1.0和TLSv1.1了。更新pip Read More...