1.3

# 1.循环遍历所有得key
dic = {'K1': 'v1', 'K2': 'v2', 'K3': 'v3'}

print(dic)

for i in dic.keys():
    print(i)

# 2.循环遍历所有得value
for j in dic.values():
    print(j)

# 3.循环遍历所有得key和value
for k, v in dic.items():   //这种方法不用效率低
    print(k, v)
for k in dic:
    print(k,dic[k])

# 4.添加键值对 并输出
dic['K4'] = 'v4'
print(dic)

# 5.删除了K1键值对
dic.pop('K1')
del dic['K1']
print(dic)

# 6.删除K5 不存在返回 None
result = dic.get('K5')
if result != None:
    dic.pop('K5')
else:
    print(result)

# 7.获取字典中 K2对应得值
# result = dic['K2']
result = dic.get('K2')
print(result) 

# 8.获取K6不存在返回None
result = dic.get('K6')
print(result)

# 9.dic2 更新 被dic
dic2 = {'K1': 'v111', 'a': 'b'}
print(dic,dic2)
dic2.update(dic)
print(dic,dic2)

# 10.列表 字典 嵌套
Lis = ['k',['qwe',20,{'k1':['tt',3,'1']},89],'ab']
print(Lis)

# Lis[1][2].get('k1')[0] = 'TT'
Lis[1][2].get('k1')[0] = Lis[1][2].get('k1')[0].upper()
print(Lis)

Lis[1][2].get('k1')[1] = '100'
print(Lis)

Lis[1][2].get('k1')[-1] = 101
print(Lis)

# 11.将列表得奇数位 添加到字典中 
li = [1, 2, 3, 'a', 'b', 4, 'c']
dic = {}
dic.setdefault('K1',[])
for index, i in enumerate(li):
    if index % 2 == 1:
        dic['K1'].append(i)

print(dic)