说我有这个DataFrame:

>>> import pandas as pd
>>> df = pd.DataFrame(['eggs, spam', 'lobster', 'eggs, lobster'], columns=['ingredients'])
>>> df
     ingredients
0     eggs, spam
1        lobster
2  eggs, lobster


我想基于定界符“,”拆分列“成分”。我想得到一个看起来像这样的DataFrame:

     ingredients
0     eggs
1     spam
2     lobster
3     eggs
4     lobster


我该如何实现?

最佳答案

使用splitstack

df.ingredients.str.split(', ', expand=True).stack().reset_index(drop=True)

0       eggs
1       spam
2    lobster
3       eggs
4    lobster
dtype: object

10-06 10:34