解决pip 19.1使用时可能编码报错utf-8:value.decode('utf-8') if six.PY3 else value
报错:value.decode(‘utf-8’)ifsix.PY3elsevalueTraceback(mostrecentcalllast):File"/usr/local/lib/python3.6/dist-packages/pip-19.1.1-py3.6.egg/pip/_internal/commands/install.py",line524,in_warn_about_confli