【发布时间】：2019-06-09 20:16:26
【问题描述】：
运行 pandas data_reader 代码会在某些股票代码上引发错误
运行以下代码：
import pandas as pd
import pandas_datareader as dr
%matplotlib inline
df = dr.data.get_data_yahoo('FRE.DE',start='2018-10-1', end='2018-11-30')
抛出以下错误：
---------------------------------------------------------------------------
KeyError Traceback (most recent call last)
~/miniconda2/envs/py37/lib/python3.7/site-packages/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance)
2656 try:
-> 2657 return self._engine.get_loc(key)
2658 except KeyError:
pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()
pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item()
KeyError: 'Date'
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
<ipython-input-17-d55e44b68e87> in <module>
----> 1 df = dr.data.get_data_yahoo('FRE.DE',start='2018-10-1', end='2018-11-30')
2 df
~/miniconda2/envs/py37/lib/python3.7/site-packages/pandas_datareader/data.py in get_data_yahoo(*args, **kwargs)
68
69 def get_data_yahoo(*args, **kwargs):
---> 70 return YahooDailyReader(*args, **kwargs).read()
71
72
~/miniconda2/envs/py37/lib/python3.7/site-packages/pandas_datareader/base.py in read(self)
208 if isinstance(self.symbols, (compat.string_types, int)):
209 df = self._read_one_data(self.url,
--> 210 params=self._get_params(self.symbols))
211 # Or multiple symbols, (e.g., ['GOOG', 'AAPL', 'MSFT'])
212 elif isinstance(self.symbols, DataFrame):
~/miniconda2/envs/py37/lib/python3.7/site-packages/pandas_datareader/yahoo/daily.py in _read_one_data(self, url, params)
140 prices.columns = [col.capitalize() for col in prices.columns]
141 prices['Date'] = to_datetime(
--> 142 to_datetime(prices['Date'], unit='s').dt.date)
143
144 if 'Data' in prices.columns:
~/miniconda2/envs/py37/lib/python3.7/site-packages/pandas/core/frame.py in __getitem__(self, key)
2925 if self.columns.nlevels > 1:
2926 return self._getitem_multilevel(key)
-> 2927 indexer = self.columns.get_loc(key)
2928 if is_integer(indexer):
2929 indexer = [indexer]
~/miniconda2/envs/py37/lib/python3.7/site-packages/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance)
2657 return self._engine.get_loc(key)
2658 except KeyError:
-> 2659 return self._engine.get_loc(self._maybe_cast_indexer(key))
2660 indexer = self.get_indexer([key], method=method, tolerance=tolerance)
2661 if indexer.ndim > 1 or indexer.size > 1:
pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()
pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.PyObjectHashTable.get_item()
KeyError: 'Date'
当我将 'FRE.DE' 替换为 'FRM.DE' 这是一个不同的股票代码时，它可以完美运行。
在想，嗯，也许该符号的数据不存在，我去了雅虎财经页面： https://de.finance.yahoo.com/quote/FRE.DE/history?p=FRE.DE
还有历史数据（如果显示的话）。
【问题讨论】：
标签： python yahoo-finance pandas-datareader