pd.date_range(

    start=None,#开始时间

    end=None,#截止时间

    periods=None,#总长度

    freq=None,#时间间隔

    tz=None,#时区

    normalize=False,#是否标准化到midnight

    name=None,#date名称

    closed=None,#首尾是否在内

    **kwargs,

)  

import pandas as pd

print pd.date_range('1/1/2011', periods=5)  

DatetimeIndex(['2011-01-01', '2011-01-02', '2011-01-03', '2011-01-04', '2011-01-05'],

dtype='datetime64[ns]', freq='D')

print pd.date_range('1/1/2011', periods=5,freq='M')

DatetimeIndex(['2011-01-31', '2011-02-28', '2011-03-31', '2011-04-30', '2011-05-31'],

dtype='datetime64[ns]', freq='M')