Pivot：ValueError：索引包含重复的条目，不能重新整形[重复]

Question

这个问题在这里已有答案：

• Pandas pivot table ValueError: Index contains duplicate entries, cannot reshape 2回答

我想在清理和预处理之后在给定的最终表中绘制主题标签和用户名之间的热图。得到以下错误。

我已粘贴完整的错误，我正在搜索类似的StackOverflow错误，但无法获得正确的结果。

final_sns = final.pivot("hashtags", "username")
 ax = sns.heatmap(final_sns)

ValueError                                Traceback (most recent call last)
<ipython-input-51-277e0506604d> in <module>()
----> 1 final_sns = final.pivot("hashtags", "username")
      2 ax = sns.heatmap(final_sns)

c:\users\apex_predator\appdata\local\programs\python\python36\lib\site-packages\pandas\core\frame.py in pivot(self, index, columns, values)
   5192         """
   5193         from pandas.core.reshape.reshape import pivot
-> 5194         return pivot(self, index=index, columns=columns, values=values)
   5195 
   5196     _shared_docs['pivot_table'] = """

c:\users\apex_predator\appdata\local\programs\python\python36\lib\site-packages\pandas\core\reshape\reshape.py in pivot(self, index, columns, values)
    413             indexed = self._constructor_sliced(self[values].values,
    414                                                index=index)
--> 415     return indexed.unstack(columns)
    416 
    417 

c:\users\apex_predator\appdata\local\programs\python\python36\lib\site-packages\pandas\core\frame.py in unstack(self, level, fill_value)
   5532         """
   5533         from pandas.core.reshape.reshape import unstack
-> 5534         return unstack(self, level, fill_value)
   5535 
   5536     _shared_docs['melt'] = ("""

c:\users\apex_predator\appdata\local\programs\python\python36\lib\site-packages\pandas\core\reshape\reshape.py in unstack(obj, level, fill_value)
    493     if isinstance(obj, DataFrame):
    494         if isinstance(obj.index, MultiIndex):
--> 495             return _unstack_frame(obj, level, fill_value=fill_value)
    496         else:
    497             return obj.T.stack(dropna=False)

c:\users\apex_predator\appdata\local\programs\python\python36\lib\site-packages\pandas\core\reshape\reshape.py in _unstack_frame(obj, level, fill_value)
    507         unstacker = partial(_Unstacker, index=obj.index,
    508                             level=level, fill_value=fill_value)
--> 509         blocks = obj._data.unstack(unstacker)
    510         return obj._constructor(blocks)
    511     else:

c:\users\apex_predator\appdata\local\programs\python\python36\lib\site-packages\pandas\core\internals.py in unstack(self, unstacker_func)
   4608         unstacked : BlockManager
   4609         """
-> 4610         dummy = unstacker_func(np.empty((0, 0)), value_columns=self.items)
   4611         new_columns = dummy.get_new_columns()
   4612         new_index = dummy.get_new_index()

c:\users\apex_predator\appdata\local\programs\python\python36\lib\site-packages\pandas\core\reshape\reshape.py in __init__(self, values, index, level, value_columns, fill_value, constructor)
    135 
    136         self._make_sorted_values_labels()
--> 137         self._make_selectors()
    138 
    139     def _make_sorted_values_labels(self):

c:\users\apex_predator\appdata\local\programs\python\python36\lib\site-packages\pandas\core\reshape\reshape.py in _make_selectors(self)
    173 
    174         if mask.sum() < len(self.index):
--> 175             raise ValueError('Index contains duplicate entries, '
    176                              'cannot reshape')
    177 

ValueError: Index contains duplicate entries, cannot reshape

我错过了什么？

Answer 1

好像你的DataFrame中有重复的行，所以你的Pivot不知道在旋转时要采取哪一行。

试试这个duplicated方法来检查它们。