xp系统安装matplotlib时会遇到包缺失的问题，这几个包可能是你需要的，分别是pyparsing-2.0.4-py2.py3-none-any.whl、python_dateutil-2.3-py2.py3-none-any.whl、pytz-2015.2-py2.py3-none-any.whl、six-1.6.0-py2.py3-none-any.whl