python pandas：在數據框內重命名系列嗎？

Question

我正在使用python pandas進行數據分析，我想更改數據框中的系列名稱。

這可行，但效率似乎很低：

AA = pandas.DataFrame( A )
for series in A:
    AA[A_prefix+series] = A[series]
    del A[series]

有沒有辦法更改系列名稱？

Answer 1

當然，您可以使用重命名方法：

In [11]: df = DataFrame({"A": [1,2], "B": [3,4]})

In [12]: df.rename(columns={"A": "series formerly known as A"})
Out[12]: 
   series formerly known as A  B
0                           1  3
1                           2  4

但這不會改變df ：

In [13]: df
Out[13]: 
   A  B
0  1  3
1  2  4

如果要使用inplace ，則可以得到該行為：

In [14]: df.rename(columns={"A": "series formerly known as A"}, inplace=True)
Out[14]: 
   series formerly known as A  B
0                           1  3
1                           2  4

In [15]: df
Out[15]: 
   series formerly known as A  B
0                           1  3
1                           2  4