错误：import pandas as pd 报错 “No module named 'pandas.lib'”
原因：安装了ggplot， 与pandas有兼容问题
解决：
修改anaconda3\Lib\site-packages\ggplot\stats\smoothers.py：
注释这句：from pandas.lib import Timestamp
date_types = (
pd.tslib.Timestamp,
pd.DatetimeIndex,
pd.Period,
pd.PeriodIndex,
datetime.datetime,
datetime.time
)
pd.tslib.Timestamp修改为pd.Timestamp
修改anaconda3\Lib\site-packages\ggplot\utils.py：
date_types = (
pd.tslib.Timestamp,
pd.DatetimeIndex,
pd.Period,
pd.PeriodIndex,
datetime.datetime,
datetime.time
)
pd.tslib.Timestamp修改为pd.Timestamp
