Windows下安装安装 python/pip/numpy/matplotlib下出现的一些问题
1.Traceback (most recent call last)（权限问题）:
File "c:\program files\python35\lib\site-packages\pip\basecommand.py", line 21
2. 软件源问题
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ReadTimeoutError("HTTPSConnectionPool(host='pypi.org', port=443): Read timed out. (read timeout=15)")': /simple/pandas/
ERROR: Could not find a version that satisfies the requirement pandas (from versions: none)
ERROR: No matching distribution found for pandas
解决办法：pip install 包名 -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
