重命名频率数据帧中的列

Question

我计算出频率数据帧。但是，我需要重命名第一列（没有名称，如下所示）。

                    Frequency
Trump won election 46
US working vaccine  45
seqirus coronavirus vitamine    45
... ...
Apple closed shops  1
still water helps   1

创建者

freq = sum(sparse_matrix).toarray()[0]
df=pd.DataFrame(freq, index=word_vectorizer.get_feature_names(), columns=['Frequency'])
df=df.sort_values(by='Frequency', ascending=False)

我尝试过

df = df.rename(columns={'index':'Words'})

但是什么都没有改变。我的预期输出将是：

Words                  Frequency
Trump won election 46
US working vaccine  45
seqirus coronavirus vitamine    45
... ...
Apple closed shops  1
still water helps   1

任何帮助将不胜感激。谢谢

Answer 1

使用此：

df.index.names = ['Words']

Answer 2

将rename更改为rename_axis

df = df.rename_axis('Words')