>>使用pip install 的时候频繁出现以下提示语：
Mac-mini:~ $ pip install pyspider#packagename
Collecting pyspider
Could not fetch URL https://pypi.python.org/simple/pyspider/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:661) - skipping
Could not find a version that satisfies the requirement pyspider (from versions: )
No matching distribution found for pyspider
解决方法：
终端执行：1. curl https://bootstrap.pypa.io/get-pip.py >> get-pip.py
2.python get-pip.py
