Python中常见的字典dict处理

#字典的赋值
d = [{"dasda": 123, "gsgsg": 3344}, {"dasdz": 123, "gsksg": 3344}]
print(d["gsgsg"])
for i in d:
    print(i)       #  只显示Key
for k, v in enumerate(d):
    print(k, v)
    print(d[0].get("gsgsg"))

#表格中的字典处理
alist = [{'name':'a','age':20},
        {'name':'b','age':30},
         {'name':'c','age':25}]
# 请按 alist 中元素的age 由大到小排序；
alist.sort(key=lambda x:x['age'], reverse=True)
print(alist)

# 切割存入字典
# str1 = "k:1|k1:2|k2:3|k3:4"
# str_list = str1.split('|')
# d = {}
# for l in str_list:
#     key, value = l.split(':')
#     d[key] = value
# print(d)

将列表 li = ["alex", "seven"] 转换成字典且字典的 key 按照 10 开始向后递增
li = ["alex", "seven"]
dict = {}
for i, name in enumerate(li,10):
    dict[i] = name
print(dict)           #   {10: 'alex', 11: 'seven'}

lst = [11,12,14]
将lst转换成字典
dic = {0:11,1:12,2:14}
{i:lst[i] for i in range(len(lst))}

dic = {"张无忌":"赵敏", "杨过":"小龙女", "郭靖":"黄蓉"}
dic中的K,V互换
dic2 = {v:k for k, v in dic.items()}
print(dic2)
dic2 = {dic[k]:k for k in dic }
print(dic2)