Python - 将更改应用于整个列

Question

修改整列中所有值的最佳方法是什么？

这就是它的样子:

data.locations.head()    

0           [{'name': 'Chevy Chase, MD'}]
1                [{'name': 'Irvine, CA'}]
2    [{'name': 'San Francisco Bay Area'}]
3                 [{'name': 'Macon, GA'}]
4               [{'name': 'Fremont, CA'}]
Name: locations, dtype: object

我想把它改成这样:

0           [{'Chevy Chase, MD'}]
1                [{'Irvine, CA'}]
2    [{'San Francisco Bay Area'}]
3                 [{'Macon, GA'}]
4               [{'Fremont, CA'}]

Answer 1

您可以使用apply通过[0]选择list中的第一个dict，然后选择键 名称:

print (df.locations.apply(lambda x: [{x[0]['name']}]))
0           [{Chevy Chase, MD}]
1                [{Irvine, CA}]
2    [{San Francisco Bay Area}]
3                 [{Macon, GA}]
4               [{Fremont, CA}]
Name: locations, dtype: object