假设我有以下数据框:
d = {'col1': [1, 2], 'col2': [3, 4]}
df = pd.DataFrame(data=d)
我想用数组 xtra
扩展 col1
.但是这会出错.
I would like to extend col1
with array xtra
. However this errors out.
xtra = [3,4]
df['col1'].append(xtra)
如何将 xtra
附加到 df.col1
,以使最终的 otuput 看起来像这样?
How can I append xtra
to df.col1
, so that the final otuput would looks as so?
col1 col2
0 1 3
1 2 4
2 3 nan
3 4 nan
只需复制您使用的相同格式 (dict
) 即可制作如下数据框:
just copy the same format you used (dict
) to make a dataframe like so:
import pandas as pd
d = {'col1': [1, 2], 'col2': [3, 4]}
df = pd.DataFrame(data=d)
xtra = {'col1': [3,4]}
df = df.append(pd.DataFrame(xtra))
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