遍历if语句的行并添加到新列[Pandas / Python]

Question

我有一个3列的数据框

           Hospital              2009-10  2010-11
Aberystwyth Mental Health Unit     19       19
Bro Ddyfi Community Hospital       16       10  
Bronglais General Hospital         160      148
Caebryn Mental Health Unit         37       39 
Carmarthen Mental Health Unit      38       31  

我正在尝试创建一个函数来检查单词是否在医院列中，如果这样，它将单词放入新列中，如下所示：

               Hospital              2009-10  2010-11    Hospital Type
    Aberystwyth Mental Health Unit     19       19          Mental
    Bro Ddyfi Community Hospital       16       10          Community  
    Bronglais General Hospital         160      148         General
    Caebryn Mental Health Unit         37       39          Mental
    Carmarthen Mental Health Unit      38       31          Mental

这是我尝试过的代码：

def find_type(x):
    if df['Hospital'].str.contains("Mental").any():
        return "Mental"
    if df['Hospital'].str.contains("Community").any():
        return "Community"
    else:
        return "Other"

df['Hospital Type'] = df.apply(find_type)

我得到的输出是这样的：

               Hospital              2009-10  2010-11    Hospital Type
    Aberystwyth Mental Health Unit     19       19          NaN
    Bro Ddyfi Community Hospital       16       10          NaN  
    Bronglais General Hospital         160      148         NaN
    Caebryn Mental Health Unit         37       39          NaN
    Carmarthen Mental Health Unit      38       31          NaN

我怎样才能得到预期的输出呢？

谢谢！

Answer 1

使用以|分隔的关键字extract 与fillna ：

pat = r"(Mental|Community)"
df['Hospital Type'] = df['Hospital'].str.extract(pat, expand=False).fillna('Other')
print (df)
                         Hospital  2009-10  2010-11 Hospital Type
0  Aberystwyth Mental Health Unit       19       19        Mental
1    Bro Ddyfi Community Hospital       16       10     Community
2      Bronglais General Hospital      160      148         Other
3      Caebryn Mental Health Unit       37       39        Mental
4   Carmarthen Mental Health Unit       38       31        Mental