Python-错误:熊猫哈希表密钥错误
我已经使用熊猫成功读取了一个csv文件。当我尝试从数据框中打印特定列时,出现键盘错误。因此,我与错误共享代码。
import pandas as pdreviews_new = pd.read_csv("D:\\aviva.csv")
reviews_new['review']
**
reviews_new['review']
Traceback (most recent call last):
File "<ipython-input-43-ed485b439a1c>", line 1, in <module>
reviews_new['review']
File "C:\Users\30216\AppData\Local\Continuum\Anaconda2\lib\site-packages\pandas\core\frame.py", line 1997, in __getitem__
return self._getitem_column(key)
File "C:\Users\30216\AppData\Local\Continuum\Anaconda2\lib\site-packages\pandas\core\frame.py", line 2004, in _getitem_column
return self._get_item_cache(key)
File "C:\Users\30216\AppData\Local\Continuum\Anaconda2\lib\site-packages\pandas\core\generic.py", line 1350, in _get_item_cache
values = self._data.get(item)
File "C:\Users\30216\AppData\Local\Continuum\Anaconda2\lib\site-packages\pandas\core\internals.py", line 3290, in get
loc = self.items.get_loc(item)
File "C:\Users\30216\AppData\Local\Continuum\Anaconda2\lib\site-packages\pandas\indexes\base.py", line 1947, in get_loc
return self._engine.get_loc(self._maybe_cast_indexer(key))
File "pandas\index.pyx", line 137, in pandas.index.IndexEngine.get_loc (pandas\index.c:4154)
File "pandas\index.pyx", line 159, in pandas.index.IndexEngine.get_loc (pandas\index.c:4018)
File "pandas\hashtable.pyx", line 675, in pandas.hashtable.PyObjectHashTable.get_item (pandas\hashtable.c:12368)
File "pandas\hashtable.pyx", line 683, in pandas.hashtable.PyObjectHashTable.get_item (pandas\hashtable.c:12322)
KeyError: 'review'
**
有人可以帮我吗?
回答:
我认为首先最好调查一下,什么是真实的列名,如果转换成更好的列表会看到一些空格或类似的东西:
print (reviews_new.columns.tolist())
我认为可能有2个问题(显然):
1.列名中的空格(也可能在数据中)
解决方案是strip
列名称中的空格:
reviews_new.columns = reviews_new.columns.str.strip()
或将参数添加skipinitialspace
到read_csv
:
reviews_new = pd.read_csv("D:\\aviva.csv", skipinitialspace=True)
2.默认使用不同的分隔符 ,
解决方案是添加参数sep
:
#sep is ;reviews_new = pd.read_csv("D:\\aviva.csv", sep=';')
#sep is whitespace
reviews_new = pd.read_csv("D:\\aviva.csv", sep='\s+')
reviews_new = pd.read_csv("D:\\aviva.csv", delim_whitespace=True)
编辑:
你在列名中获得空格,因此需要1.solutions
:
print (reviews_new.columns.tolist())['Name', ' Date', ' review']
^ ^
以上是 Python-错误:熊猫哈希表密钥错误 的全部内容, 来源链接: utcz.com/qa/417845.html