用pandas apply 创造新列条件运行遇到奇怪的现象

Question

我的数据有两列，比如A列和B列吧。A列有PERMANENTLY WITHDRAWN和TEMPORARILY WITHDRAWN，以及其他值，B列有DRUG WITHDRAWN，DRUG INTERRUPTED和其他值。我想通过比较AB两列创建一个新列C，新列在一下条件下为"YES": 如果A列是PERMANENTLY WITHDRAWN而且B列是DRUG WITHDRAWN，或者A列是TEMPORARILY WITHDRAWN，B列是DRUG INTERRUPTED，或者A列和B列完全相等。我的代码如下：

def aeact_compare(x,y):
    if x.strip()  in ["PERMANENTLY WITHDRAWN\n","PERMANENTLY WITHDRAWN"] and y.strip() in ["DRUG WITHDRAWN\n","DRUG WITHDRAWN"]:
        return "YES"
    elif x.strip() in ["TEMPORARILY WITHDRAWN\n","TEMPORARILY WITHDRAWN"] and y.strip() in ["DRUG INTERRUPTED\n","DRUG INTERRUPTED"]:
        return "YES"
    elif x.strip() == y.strip():
        return "YES"
    else:
        return "NO"
sdb_pdb_trt["Action Taken Match?"] = sdb_pdb_trt.apply(lambda x : aerel_compare(x['Action Taken'],x['Lastest Action Taken with TRT']),axis=1)       
 

可是代码头两行的比较没起作用，请大家帮我看一下代码问题出在哪里？