AttributeError：'DataFrame'对象没有属性'date'

Question

我正在关注Harvard-CS109-homework-1 的解决方案代码 https://github.com/cs109/content

iPythonNotebook上的

，运行这行代码后出现此错误（我没有更改解决方案代码）“errors = all_error_data（）”：

errors = all_error_data()


/anaconda/lib/python2.7/site-packages/ipykernel/__main__.py:67: FutureWarning: sort(columns=....) is deprecated, use sort_values(by=.....)
/anaconda/lib/python2.7/site-packages/ipykernel/__main__.py:46: FutureWarning: .resample() is now a deferred operation
use .resample(...).mean() instead of .resample(...)
---------------------------------------------------------------------------



AttributeError                            Traceback (most recent call last)
<ipython-input-18-aea6d425eefd> in <module>()
----> 1 errors = all_error_data()

<ipython-input-17-2a9c686164e8> in all_error_data()
     17 #your code here
     18 def all_error_data():
---> 19     data = [error_data(race_page) for race_page in find_governor_races(page)]
     20     return pd.concat(data, ignore_index=True)

<ipython-input-14-5c576ec1e316> in error_data(url)
     48     #compute forecast length in days
     49     #(assuming that last forecast happens on the day of the election, for simplicity)
---> 50     forecast_length = (df.date.max() - df.date).values
     51     forecast_length = forecast_length / np.timedelta64(1, 'D')  # convert to number of days
     52 

//anaconda/lib/python2.7/site-packages/pandas/core/generic.pyc in __getattr__(self, name)
   2667             if name in self._info_axis:
   2668                 return self[name]
-> 2669             return object.__getattribute__(self, name)
   2670 
   2671     def __setattr__(self, name, value):

AttributeError: 'DataFrame' object has no attribute 'date' 

非常感谢分享建议!!

Answer 1

我遇到了同样的问题并做了一些研究。 pandas.resample有几处更改，现在更改DataFrame并删除非数字数据。

在pd.resample之后没有'data'列，所以为了修复你的代码，只需改变第50行来寻址索引列而不是数据co：

    forecast_length = (df.index.max() - df.index).values