python数据类型的四个练手小作业

一、元素分类

有如下值集合 [11,22,33,44,55,66,77,88,99,90...]，将所有大于 66 的值保存至字典的第一个key中，将小于 66 的值保存至第二个key的值中。
即： {'k1': 大于66的所有值, 'k2': 小于66的所有值}

li=[11,22,33,44,55,66,77,88,99]
dic={
     1:[],
     2:[],
}
for i in li:
    if i<66:
        dic[1].append(i)
    if i >=66:
        dic[2].append(i)

print dic

s={}
a=[]
b=[]
li=[11,22,33,44,55,66,77,88,99]
for i in li:
    if i>66:
        a.append(i)
        
    if i<=66:
        b.append(i)
        
s={'k1':a,'k2':b}
print s        

二、查找

查找列表中元素，移除每个元素的空格，并查找以 a或A开头 并且以 c 结尾的所有元素。

    li = ["alec", " aric", "Alex", "Tony", "rain"]

    tu = ("alec", " aric", "Alex", "Tony", "rain") 

    dic = {'k1': "alex", 'k2': ' aric',  "k3": "Alex", "k4": "Tony"}


li = ["alec", " aric", "Alex", "Tony", "rain"]
tu = ("alec", " aric", "Alex", "Tony", "rain")
dic = {'k1': "alex", 'k2': ' aric',  "k3": "Alex", "k4": "Tony"}

for i in li:
    i.strip()
print li

for i in li:
    if i.startswith('a') or i.startswith('A') and i.endswith('c') is True:
        print i
# 元组同上

for i in dic.values:
    i.strip()
print dic

for i in dic.values:
    if i.startswith('a') or i.startswith('A') and i.endswith('c') is True:
        print i

四、购物车

功能要求：

• 要求用户输入总资产，例如：2000
• 显示商品列表，让用户根据序号选择商品，加入购物车
• 购买，如果商品总额大于总资产，提示账户余额不足，否则，购买成功。
• 附加：可充值、某商品移除购物车

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goods =[

    {"name":"电脑", "price": 1999},

    {"name":"鼠标", "price": 10},

    {"name":"游艇", "price": 20},

    {"name":"美女", "price": 998},

m=input('how much do you have:')
goods = [
    {"name": "computer", "price": 1999},
    {"name": "mouse", "price": 10},
    {"name": "boat", "price": 20},
    {"name": "woman", "price": 998},
]
#car_dict={电脑：{'price':单价，'num':数量}}
car_dict={}
for i in goods:
    print i['name']+str(i['price'])

while True:
    i2=input('which one do you need:')
    if i2=='y':
        print car_dict
        break
    for i in goods:
        if i['name']==i2:
            name=i['name']
            if name in car_dict.keys():
                car_dict[name]['num']+=1
            else:
                    car_dict[name]={'single_price':i['price'],'num':1}
all=0
for k,v in car_dict.items():
    n=v['single_price']
    m=v['num']
    all_sum=m+n
    all+=all_sum


if int(m)>all:
    print '跟你回家'
else:
    print '穷逼，滚！'
        

五、用户交互，显示省市县三级联动的选择

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dic ={

    "河北": {

        "石家庄": ["鹿泉","藁城", "元氏"],

        "邯郸": ["永年","涉县", "磁县"],

    }

    "河南": {

        ...

    }

    "山西": {

        ...

    }

 

}

 

dic = {
    "q": {
        "w": ["r", "t", "y"],
        "e": ["d", "f", "g"],
    }
}
for i in dic:
    print i
a=input()
for t in dic[a]:
    print t
b=input()
for x in dic[a][b]:
    print x