我想从我的数据框列中提取年份data3['CopyRight'].
CopyRight
2015 Sony Music Entertainment
2015 Ultra Records , LLC under exclusive license
2014 , 2015 Epic Records , a division of Sony Music Entertainment
Compilation ( P ) 2014 Epic Records , a division of Sony Music Entertainment
2014 , 2015 Epic Records , a division of Sony Music Entertainment
2014 , 2015 Epic Records , a division of Sony Music Entertainment
我使用以下代码来提取年份:
data3['CopyRight_year'] = data3['CopyRight'].str.extract('([0-9]+)', expand=False).str.strip()
我的代码我只获得了第一次出现的年份.
CopyRight_year
2015
2015
2014
2014
2014
2014
我想提取专栏中提到的所有年份. …