Python Pandas KeyError value_count（）

Question

我正在python中执行以下操作：

data = pd.read_csv('data/adult.csv', ',', header=None)
print(data["income"].value_counts())

我不断收到以下错误：

Traceback (most recent call last):
File "/usr/localnfs/Compiler/python/Anaconda3-2019.07/lib/python3.7/site-packages/pandas/core/indexes/base.py", line 2657, in get_loc
return self._engine.get_loc(key)
File "pandas/_libs/index.pyx", line 108, in pandas._libs.index.IndexEngine.get_loc
File "pandas/_libs/index.pyx", line 129, in pandas._libs.index.IndexEngine.get_loc
File "pandas/_libs/index_class_helper.pxi", line 91, in pandas._libs.index.Int64Engine._check_type
KeyError: 'income'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
   File "main.py", line 42, in <module>
   print(data["income"].value_counts())
   File "/usr/localnfs/Compiler/python/Anaconda3-2019.07/lib/python3.7/site-packages/pandas/core/frame.py", line 2927, in __getitem__
   indexer = self.columns.get_loc(key)
   File "/usr/localnfs/Compiler/python/Anaconda3-2019.07/lib/python3.7/site-packages/pandas/core/indexes/base.py", line 2659, in get_loc
   return self._engine.get_loc(self._maybe_cast_indexer(key))
   File "pandas/_libs/index.pyx", line 108, in pandas._libs.index.IndexEngine.get_loc
   File "pandas/_libs/index.pyx", line 129, in pandas._libs.index.IndexEngine.get_loc
   File "pandas/_libs/index_class_helper.pxi", line 91, in pandas._libs.index.Int64Engine._check_type
   KeyError: 'income'

我不知道此错误来自何处。我的程序只有这两行（当然还有库）。请帮助。

Answer 1

如果您要使用收入作为列标题/名称，则删除header = none参数

data = pd.read_csv('data/adult.csv', ',')
print(data["income"].value_counts())

或根据您的数据框使用适当的列名，

data = pd.read_csv('data/adult.csv', ',', header=None)
print(data[14].value_counts())