似乎您需要在追加操作后重新排序列:
In [25]:
merged = df1.append(df2)
cols = list(df1) + list(df2)
merged.columns = cols
merged.columns
Out[25]:
Index(['Org_Goals_1', 'Calc_Goals_1', 'Diff_Goals_1', 'Org_Goals_2', 'Calc_Goals_2', 'Diff_Goals_2'], dtype='object')
例子:
In [26]:
df1 = pd.DataFrame(columns=['Org_Goals_1','Calc_Goals_1','Diff_Goals_1'], data = randn(5,3))
df2 = pd.DataFrame(columns=['Org_Goals_2','Calc_Goals_2','Diff_Goals_2'], data=randn(5,3))
merged = df1.append(df2)
cols = list(df1) + list(df2)
merged.columns = cols
merged
Out[26]:
Org_Goals_1 Calc_Goals_1 Diff_Goals_1 Org_Goals_2 Calc_Goals_2 \
0 0.028935 NaN -0.687143 NaN 1.528579
1 0.943432 NaN -2.055357 NaN -0.720132
2 0.035234 NaN 0.020756 NaN 1.556319
3 1.447863 NaN 0.847496 NaN -1.458852
4 0.132337 NaN -0.255578 NaN -0.222660
0 NaN 0.131085 NaN 0.850022 NaN
1 NaN -1.942110 NaN 0.672965 NaN
2 NaN 0.944052 NaN 1.274509 NaN
3 NaN -1.796448 NaN 0.130338 NaN
4 NaN 0.961545 NaN -0.741825 NaN
Diff_Goals_2
0 NaN
1 NaN
2 NaN
3 NaN
4 NaN
0 0.727619
1 0.022209
2 -0.350757
3 1.116637
4 1.947526
相同的 alpha 排序也会在 concat 中发生,因此在添加后似乎必须重新排序。
编辑:
另一种选择是使用 join:
In [32]:
df1.join(df2)
Out[32]:
Org_Goals_1 Calc_Goals_1 Diff_Goals_1 Org_Goals_2 Calc_Goals_2 \
0 0.163745 1.608398 0.876040 0.651063 0.371263
1 -1.762973 -0.471050 -0.206376 1.323191 0.623045
2 0.166269 1.021835 -0.119982 1.005159 -0.831738
3 -0.400197 0.567782 -1.581803 0.417112 0.188023
4 -1.443269 -0.001080 0.804195 0.480510 -0.660761
Diff_Goals_2
0 -2.723280
1 2.463258
2 0.147251
3 2.328377
4 -0.248114
NaN
列在列排序中引起了一些混乱。 - EdChum