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}
s = {11,22,33,44,55,66,77,88,99,90}
num = {'k1':[],'k2':[]}
li = list(s)
for item in s:
#print(item)
if item > 66:
num['k1'].append(item)
elif item < 66:
num['k2'].append(item)
else:
continue
for item in num.values():
print(item)
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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"}
print('''li = ["alec", " aric", "Alex", "Tony", "rain"]''')
for item in li:
new = item.strip()
if (new.startswith('a') or new.startswith('A')) and new.endswith('c'):
print(new)
print('''
tu = ("alec", " aric", "Alex", "Tony", "rain")''')
for item in tu:
new = item.strip()
if (new.startswith('a') or new.startswith('A')) and new.endswith('c'):
print(new)
print('''
dic = {'k1': "alex", 'k2': ' aric', "k3": "Alex", "k4": "Tony"}''')
for item in dic.values():
new = item.strip()
if (new.startswith('a') or new.startswith('A')) and new.endswith('c'):
print(new)
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三、输出商品列表，用户输入序号，显示用户选中的商品
商品 li = ["手机", "电脑", '鼠标垫', '游艇']
li = ["手机", "电脑", '鼠标垫', '游艇']
for k,v in enumerate(li,1):
#print(k,v)
print k,v #python是2.x版本,在语句后加一个英文的逗号 ,就能打印后不会换行
k = raw_input("请输入商品编号：")
n = int(k)
n -= 1
print "你选择的商品是：",
print(li[n])
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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
goods = [
{"name": "电脑", "price": 1999},
{"name": "鼠标", "price": 10},
{"name": "游艇", "price": 20},
{"name": "美女", "price": 998},
]
asset = 2000 #资产
shopping_cart = []#购物车
min = 0 #最便宜的商品价格
goods = [
{"name": "电脑", "price": 1999},
{"name": "鼠标", "price": 10},
{"name": "游艇", "price": 20},
{"name": "美女", "price": 998},
]
#显示可选择的商品列表
for k,v in enumerate(goods,1):
print k,v["name"],v["price"]
while asset > 0:
num = raw_input("请输入购买的商品编号：")
n = int(num)-1
if n < 0 or n >= len(goods):
print "很抱歉，你选择的商品编号不存在。请重新选择~"
continue
print "你选择购买：",goods[n]["name"],",价格是：",goods[n]["price"]
if asset - goods[n]["price"]> 0:
asset -= goods[n]["price"]
print goods[n]["name"],"购买成功!"
shopping_cart.append(goods[n])
print "asset余额：",asset
for item in goods:
p = int(item["price"])
if min > p:
min = p
if asset < p:
print "很抱歉，您余额已不足购买任何商品。谢谢你的光顾~"
break
else:
print "账户余额不足"
break
print "=================="
print "本次，您成功购买的商品有："
for item in shopping_cart:
print item["name"],item["price"]
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五、用户交互，显示省市县三级联动的选择
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 = {
"河北": {
"石家庄": ["鹿泉", "藁城", "元氏"],
"邯郸": ["永年", "涉县", "磁县"],
},
"安徽": {
"合肥市":["庐阳区","瑶海区 ","蜀山区"],
"芜湖市":["镜湖区","鸠江区","无为县"]
},
"山西": {
"太原市":["杏花岭区","小店区","小店区","小店区"],
"大同市":["城区","矿区","南郊区"]
}
}
#打印出省市县列表
for k,v in enumerate(dic,1):
print k,v
province = dic[v]
for item in province:
print item
city = province[item]
for item in city:
print item,
print "
"
while 1:
province = raw_input("请输入省会：")
if dic.get(province) == None:
print "您输入的省会",province,"还没录入"
continue
else:
for item in dic[province]:
print item
city = raw_input("请输入市：")
if city not in dic[province]:
print "您输入的市",city,"还没录入"
continue
else:
for item in dic[province][city]:
print item;
#print city
county = raw_input("请输入县：")
if county not in dic[province][city]:
print "您输入的县",county,"还没录入"
continue
else:
print "你所在的区域是：",province,city,item
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