自学python 5.

1.tu = ("alex", [11, 22, {"k1": 'v1', "k2": ["age", "name"], "k3": (11, 22, 33)}, 44])
a.元组特性:不可改变列表,只读.
b.alex不可修改.
c.k2对应的值为列表,可以修改.
tu[1][2]["k2"].append("Seven")
print(tu)
d.元组,不可修改.

2.dic = {'k1': "v1", "k2": "v2", "k3": [11, 22, 33]}
a.print(dic.keys())
b.print(dic.values())
c.for k,v in dic.items():
    print(k,v)
d.dic.setdefault("k4","v4")
print(dic)
e.dic['k1'] = 'alex'
print(dic)
f.dic['k3'].append(44)
print(dic)
g.dic['k3'].insert(0,18)
print(dic)

3.av_catalog = {
    "欧美":{
        "www.youporn.com": ["很多免费的,世界最大的","质量一般"],
        "www.pornhub.com": ["很多免费的,也很大","质量比yourporn高点"],
        "letmedothistoyou.com": ["多是自拍,高质量图片很多","资源不多,更新慢"],
        "x-art.com":["质量很高,真的很高","全部收费,屌丝请绕过"]
    },
    "日韩":{
        "tokyo-hot":["质量怎样不清楚,个人已经不喜欢日韩范了","verygood"]
    },
    "大陆":{
        "1024":["全部免费,真好,好人一生平安","服务器在国外,慢"]
    }
}
a.av_catalog['欧美']['www.youporn.com'].insert(1,'量很大')
b.av_catalog['欧美']['x-art.com'].pop()
c.av_catalog['欧美']['x-art.com'].append("金老板最喜欢这个")
d.av_catalog['日韩']["tokyo-hot"][1] = av_catalog['日韩']["tokyo-hot"][1].upper()
e.av_catalog['大陆']["1048"] = ["一天就封了"]
或者av_catalog['大陆'].setdefault('1048',["一天就封了"])
f.del av_catalog["欧美"]["letmedothistoyou.com"]
或者av_catalog["欧美"].pop("letmedothistoyou.com")
g.av_catalog["大陆"]["1024"][0] = av_catalog["大陆"]["1024"][0] + "可以爬下来"

4.有字符串 "k:1|k1:2|k2:3|k3:4" 处理成字典 {'k':1,'k1':2....}
s = "k:1|k1:2|k2:3|k3:4"
lst = s.split("|")
dic = {}
for el in lst:
    k,v = el.split(":")
    dic[k] = int(v)
print(dic)

5.元素分类
li= [11,22,33,44,55,66,77,88,99,90]，将大于 66 的值保存至字典的第一个key中，小于 66 的值保存至第二个key的值中。即： {'k1': 大于66的所有值列表, 'k2': 小于66的所有值列表}
li= [11,22,33,44,55,66,77,88,99,90]
dic = {'k1':[],"k2":[]}
for a in li:
    if a > 66:
        dic['k1'].append(a)
    elif a < 66:
        dic["k2"].append(a)
    else:
        pass
print(dic)
或
li= [11,22,33,44,55,66,77,88,99,90]
dic = {}
for a in li:
    if a > 66:
        dic.setdefault('k1',[]).append(a)
    elif a < 66:
        dic.setdefault('k2',[]).append(a)
    else:
        pass
print(dic)

6.输出商品列表，用户输入序号，显示用户选中的商品
商品列表：
goods = [{"name": "电脑", "price": 1999},
         {"name": "鼠标", "price": 10},
         {"name": "游艇", "price": 20},
         {"name": "美女", "price": 998}, ]
要求:
1：页面显示序号 + 商品名称 + 商品价格，如：
    1 电脑 1999
    2 鼠标 10
    ...
2：用户输入选择的商品序号，然后打印商品名称及商品价格.
3：如果用户输入的商品序号有误，则提示输入有误，并重新输入。
4：用户输入Q或者q，退出程序。
goods = [{"name": "电脑", "price": 1999},
          {"name": "鼠标", "price": 10},
          {"name": "游艇", "price": 20},
          {"name": "美女", "price": 998}, ]
for a in range(len(goods)):
    good = goods[a]
    print(a+1,good["name"],good["price"])
while 1:
    b = input("请输入序号:")
    if b.upper() == "Q":
         break
    c = int(b)-1
    if c in range(4):
        print(goods[c]["name"], goods[c]["price"])
        break
    else:
        print("输入有误,重新输入:")