python中的投资组合跟踪器

我正在使用pandas远程数据功能制作投资组合跟踪器，但是，我遇到了传递多个股票名称和代码的问题 .

我想用公司名称创建单独的数据框，我正在尝试使用 **kwargs ，但它对它的工作原理有点模糊 .

我觉得我很亲密但却遗漏了某些东西 .

def portfolio(startDateYE, startDateMonth, startDateDay, end_dateYE,
              end_dateMonth, end_dateDay,  **kwargs):
    '''insert desired started and ending date as 2014,1,1 and key value pairs
    of the stock you would like to look up, i.e. ford = "f" '''
    start = datetime.datetime(startDateYE, startDateMonth, startDateDay)
    end = datetime.datetime(end_dateYE, end_dateMonth, end_dateDay)
    for key, value in kwargs.items():
        key = web.DataReader("%s" % value,'yahoo', start, end)

我将如何传递可变数量的变量的示例：

portfolio(2010,1,1,2011,1,1,ford="f",google="googl")

我的目标是：

In [6]: ford.ix['2010-01-04']
Out[6]: 
Open         1.017000e+01
High         1.028000e+01
Low          1.005000e+01
Close        1.028000e+01
Volume       6.085580e+07
Adj Close    8.755953e+00
Name: 2010-01-04 00:00:00, dtype: float64

编辑：

def portfolio(startDateYE, startDateMonth, startDateDay, end_dateYE,
              end_dateMonth, end_dateDay,  **kwargs):
    '''insert desired started and ending date as 2014,1,1 and key value pairs
    of the stock you would like to look up, i.e. ford = "f" '''
    start = datetime.datetime(startDateYE, startDateMonth, startDateDay)
    end = datetime.datetime(end_dateYE, end_dateMonth, end_dateDay)
    results = {}  # this is an empty dictionary
    for key, value in kwargs.iteritems():
        results[key] = web.DataReader(value, key, 'yahoo', start, end)

    print(results)

编辑：

现在我收到以下错误：

`---------------------------------------------------------------------------

ValueError Traceback（最近一次调用最后一次）在（）34'''35 ---> 36投资组合（2012,1,1,2013,1,1，facebook =“f”，google =“googl”）37 38＃ Adjusted_f = f ['Adj Close']

在投资组合中（startDateYE，startDateMonth，startDateDay，end_dateYE，end_dateMonth，end_dateDay，** kwargs）27 results = {}＃这是一个空字典28，用于键，值在kwargs.iteritems（）中：---> 29结果[key ] = web.DataReader（值，键，'雅虎'，开始，结束）30 31'''

DataReader中的/Users/andrewclark/anaconda2/lib/python2.7/site-packages/pandas/io/data.pyc（name，data_source，start，end，retry_count，pause）86 ff = DataReader（“F-F_ST_Reversal_Factor”， “famafrench”）87“”“---> 88 start，end = _sanitize_dates（start，end）89 90 if data_source ==”yahoo“：

_ssers/andrewclark/anaconda2/lib/python2.7/site-packages/pandas/io/data.pyc in _sanitize_dates（start，end）104 def _sanitize_dates（start，end）：105 from pandas.core.datetools import to_datetime - - > 106 start = to_datetime（start）107 end = to_datetime（end）108如果start为None：

/Users/andrewclark/anaconda2/lib/python2.7/site-packages/pandas/util/decorators.pyc in wrapper（* args，** kwargs）89 else：90 kwargs [new_arg_name] = new_arg_value ---> 91 return func（* args，** kwargs）92返回包装器93返回_deprecate_kwarg

/Users/andrewclark/anaconda2/lib/python2.7/site-packages/pandas/tseries/tools.pyc in_datetime（arg，errors，dayfirst，yearfirst，utc，box，format，exact，coerce，unit，infer_datetime_format）285 yearfirst = yearfirst，286 utc = utc，box = box，format = format，exact = exact， - > 287 unit = unit，infer_datetime_format = infer_datetime_format）288 289

/Users/andrewclark/anaconda2/lib/python2.7/site-packages/pandas/tseries/tools.pyc in_to_datetime（arg，errors，dayfirst，yearfirst，utc，box，format，exact，unit，freq，infer_datetime_format）414 return _convert_listlike（arg，box，format）415 - > 416 return _convert_listlike（np.array（[arg]），box，format）[0] 417 418

_convert_list中的/Users/andrewclark/anaconda2/lib/python2.7/site-packages/pandas/tseries/tools.pyc（arg，box，format，name）400返回DatetimeIndex._simple_new（values，name = name，tz = tz ）401除了（ValueError，TypeError）： - > 402如果arg为None则引发e 403 404：

ValueError：未知的字符串格式

谢谢！