Python|map搭配lambda函数使用

import pandas as pd

df = pd.read_csv(r'C:UsersgiserDesktopheilongjiang.csv',encoding='gbk')
df1 = pd.read_csv(r'C:UsersgiserDesktopcitylist.csv',encoding='gbk')
# df['type1'] = list(map(lambda x:x.split(';')[0],df['type']))
# df['type2'] = list(map(lambda x:x.split(';')[1],df['type']))
# df['type3'] = list(map(lambda x:x.split(';')[2],df['type']))
first = []
second = []
thirst = []
for i in df['type']:
    try:
        f = i.split(';')[0]
    except:
        f = ''
    try:
        r = i.split(';')[1]
    except:
        r = ''
    try:
        t = i.split(';')[2]
    except:
        t = ''
    first.append(f)
    second.append(r)
    thirst.append(t)
df['type1'] = first
df['type2'] = second
df['type3'] = thirst
for s in df1['citylist']:
    print(s)
    res = df[df['adcode']==s]
    res.to_csv(r'D:poi{}.csv'.format(s),encoding='gbk')