我有數據幀df。無法訪問大熊貓數據框中的列
df.columns gives this output
Index([u'Talk Time\t', u'Hold Time\t', u'Work Time\t', u'Call Type'], dtype='object')
這裏,列「通話時間」有「\ t」的角色吧,所以,如果我這樣做,我得到
df['Talk Time']
Traceback (most recent call last):
File "<ipython-input-78-f2b7b9f43f59>", line 1, in <module>
old['Talk Time']
File "C:\Users\Admin\Anaconda\lib\site-packages\pandas\core\frame.py", line 1780, in __getitem__
return self._getitem_column(key)
File "C:\Users\Admin\Anaconda\lib\site-packages\pandas\core\frame.py", line 1787, in _getitem_column
return self._get_item_cache(key)
File "C:\Users\Admin\Anaconda\lib\site-packages\pandas\core\generic.py", line 1068, in _get_item_cache
values = self._data.get(item)
File "C:\Users\Admin\Anaconda\lib\site-packages\pandas\core\internals.py", line 2849, in get
loc = self.items.get_loc(item)
File "C:\Users\Admin\Anaconda\lib\site-packages\pandas\core\index.py", line 1402, in get_loc
return self._engine.get_loc(_values_from_object(key))
File "pandas\index.pyx", line 134, in pandas.index.IndexEngine.get_loc (pandas\index.c:3820)
File "pandas\index.pyx", line 154, in pandas.index.IndexEngine.get_loc (pandas\index.c:3700)
File "pandas\hashtable.pyx", line 696, in pandas.hashtable.PyObjectHashTable.get_item (pandas\hashtable.c:12323)
File "pandas\hashtable.pyx", line 704, in pandas.hashtable.PyObjectHashTable.get_item (pandas\hashtable.c:12274)
KeyError: 'Talk Time'
所以我修改列刪除製表符爲錯誤如下:
for n in range(len(df.columns)):
df.columns.values[n] = df.columns.values[n].rstrip()
Tab字符得到去除,df.columns給下面的輸出
Index([u'Talk Time', u'Hold Time', u'Work Time', u'Call Type'], dtype='object')
但是,仍然當我試圖訪問一個列
df['Talk Time']
,我看到了同樣的錯誤。爲什麼會發生?