将功能应用于多行

Question

code and data sample

newdf = pd.DataFrame()
newdf['genes in system'] = df_bladder['Genes (Alphabetical order)']
#systemlist = [newdf['genes in system'][x].split(' ') for x in range (0,len(newdf))]
#bladderlist = bladderlist.append(i) if i 
def query(df): 
    genes = [i for i in newdf['genes in system'][0].split(' ') if i in list(combined_df)]
    return genes
newdf['genes in'] = newdf['genes in system'].apply(query)
newdf

我正在尝试应用此函数，该函数从与我的列表（list（combined_df））匹配的第一列中提取字符串。但是，它仅从第一行提取。