類型錯誤與數據框：列表索引必須是整數或片，而不是str的

Question

我通過下面的例子中工作，並不斷收到錯誤：

import pandas as pd 
import quandl 

df = quandl.get('WIKI/GOOGL') 
df = [['Adj. Open','Adj. High','Adj. Low','Adj. Close','Adj. Volume']] 
print(df.head()) 

類型錯誤：列表索引必須是整數或片，不STR

Answer 1

你與香草Python列表覆蓋您的DF：

df = [['Adj. Open','Adj. High','Adj. Low','Adj. Close','Adj. Volume']] 

試試這個：

In [102]: df = df.filter(regex='^Adj\.') 

In [103]: df 
Out[103]: 
      Adj. Open Adj. High Adj. Low Adj. Close Adj. Volume 
Date 
2004-08-19 50.159839 52.191109 48.128568 50.322842 44659000.0 
2004-08-20 50.661387 54.708881 50.405597 54.322689 22834300.0 
2004-08-23 55.551482 56.915693 54.693835 54.869377 18256100.0 
2004-08-24 55.792225 55.972783 51.945350 52.597363 15247300.0 
2004-08-25 52.542193 54.167209 52.100830 53.164113 9188600.0 
2004-08-26 52.637487 54.142132 52.492038 54.122070 7094800.0 
2004-08-27 54.217364 54.478169 53.008633 53.239345 6211700.0 
...    ...   ...   ...   ...   ... 
2017-03-02 856.310000 856.490000 848.720000 849.850000 1243221.0 
2017-03-03 848.940000 850.820000 844.705000 849.080000  999655.0 
2017-03-06 846.860000 848.940000 841.170000 847.270000 1030586.0 
2017-03-07 847.260000 853.330000 845.520000 851.150000 1018514.0 
2017-03-08 853.120000 856.930000 851.250000 853.640000 1019962.0 
2017-03-09 853.690000 860.710000 852.670000 857.840000 1322603.0 
2017-03-10 862.700000 864.229000 857.610000 861.405000 1326432.0 

[3162 rows x 5 columns]