python - “.. in pandas..html.py .. self.fmt.col_space.items()” : AttributeError: 'NoneType' object has no attribute 'items'

Question

我试图找出单词相似度计算中的错误。

def word_similarity_error_analysis(eval_df):
    eval_df['distance_rank'] = _normalized_ranking(eval_df['distance'])
    eval_df['score_rank'] = _normalized_ranking(eval_df['score'])
    eval_df['error'] =  abs(eval_df['distance_rank'] - eval_df['score_rank'])
    return eval_df.sort_values('error')


def _normalized_ranking(series):
    ranks = series.rank(method='dense')
    return ranks / ranks.sum()

word_similarity_error_analysis(eval_df).head()

我收到这个错误:

AttributeError                            Traceback (most recent call last)
/usr/local/lib/python3.6/dist-packages/IPython/core/formatters.py in __call__(self, obj)
    336             method = get_real_method(obj, self.print_method)
    337             if method is not None:
--> 338                 return method()
    339             return None
    340         else:

2 frames
/usr/local/lib/python3.6/dist-packages/pandas/core/frame.py in _repr_html_(self)
    732             return buf.getvalue()
    733 
--> 734         max_rows = get_option("display.max_rows")
    735         min_rows = get_option("display.min_rows")
    736         max_cols = get_option("display.max_columns")

/usr/local/lib/python3.6/dist-packages/pandas/io/formats/format.py in to_html(self, buf, encoding, classes, notebook, border)
    980             Whether the generated HTML is for IPython Notebook.
    981         border : int
--> 982             A ``border=border`` attribute is included in the opening
    983             ``<table>`` tag. Default ``pd.options.display.html.border``.
    984         """

/usr/local/lib/python3.6/dist-packages/pandas/io/formats/html.py in __init__(self, formatter, classes, border)
     57         self.col_space = {
     58             column: f"{value}px" if isinstance(value, int) else value
---> 59             for column, value in self.fmt.col_space.items()
     60         }
     61 

AttributeError: 'NoneType' object has no attribute 'items'



            word1    word2  score  ...  distance_rank  score_rank         error
1041  hummingbird  pelican  -32.0  ...       0.000243    0.000244  2.434543e-07
2315         lily     pigs  -13.0  ...       0.000488    0.000487  4.016842e-07
2951       bucket    girls   -4.0  ...       0.000602    0.000603  4.151568e-07
150         night   sunset  -43.0  ...       0.000102    0.000103  6.520315e-07
2062          oak   petals  -17.0  ...       0.000435    0.000436  7.162632e-07

[5 rows x 7 columns]

我看到很多人都遇到过相同类型的错误。但是，找不到合适的解决方案。这段代码有什么问题？此外，错误后如何产生结果。在发生错误的地方看不到确切的行号。

(我正在使用 Google Colab 和 Pandas 1.0.5 版，以备不时之需)

Answer 1

我在使用相对标准的 Pandas 代码的 AWS SageMaker 笔记本 (Python3.6) 上遇到了同样的问题。我越来越怀疑这种现象与python-pandas版本不匹配有关，因为用Python3.7在本地notebook上同样的代码并没有复制异常。

我还没有确认这确实是问题，因为环境并不完全相同，但尝试在 python > 3.6 上使用相同的数据运行相同的代码。