python pandas:在数据框中重命名一个系列？

Question

我正在使用python pandas进行数据分析,我想在数据框中更改系列的名称.

这有效,但似乎非常低效:

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

有没有办法改变系列名称？

Answer 1

当然,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

但这并没有改变df:

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

如果要使用,可以获得该行为inplace:

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