列表中列表,列表中的字典;字典中的列表,字典中的字典交叉使用

xiaoxiao2021-02-28  52

# 列表包含字典,然后进行enumerate后每个元素有3个值可以操作:下标,字典的key,value # 字典访问里面的列表 people = {'省份':'福建','chengshi':['xiamen','fz','zz']} print(people['chengshi'][0])#先找到key,才能对应value,value是列表,可用下标访问 >>>xiamen for k in people['chengshi']:#循环访问字典中的列表 print k >>> xiamen fz zz # 列表包含字典: l = [{'name':'hafo','price':12}, {'name':'dongfeng','price':5} ] print(l[0]['price']) >>12 for i in l: print (i.keys(),i.values()) >>> (['price', 'name'], [12, 'hafo']) (['price', 'name'], [5, 'dongfeng']) # 列表包含列表 l =[['1','2','3'],['a','b']] print(l[0][1]) >>>2 for i in l: for ii in i: print(ii) >>> 1 2 3 a b #字典包含字典 d = {'pizza':{'guige':'16','peiliao':'mogu'}} print (d['pizza']['peiliao']) >>>mogu for key,value in d.items(): for v in value.items(): print (v) >>>('peiliao', 'mogu') ('guige', '16') 如果写成

for key in d.items()则key就是整个item了,写成key,value就分别代表了键和值

转载请注明原文地址: https://www.6miu.com/read-2623316.html

最新回复(0)