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2、比较运算:

3、赋值运算:

4、逻辑运算:

5、成员运算:

int(整型)
int"hello world"
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name_list = [‘alex‘, ‘seven‘, ‘eric‘]或name_list = list([‘alex‘, ‘seven‘, ‘eric‘]) |
基本操作:
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ages = (11, 22, 33, 44, 55)或ages = tuple((11, 22, 33, 44, 55)) |
tuple|
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person = {"name": "mr.wu", ‘age‘: 18}或person = dict({"name": "mr.wu", ‘age‘: 18}) |
常用操作:
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li = [11,22,33,44]for item in li: print item |
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li = [11,22,33]for k,v in enumerate(li, 1): print(k,v) |
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print range(1, 10)# 结果:[1, 2, 3, 4, 5, 6, 7, 8, 9]print range(1, 10, 2)# 结果:[1, 3, 5, 7, 9]print range(30, 0, -2)# 结果:[30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4, 2] |
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}
功能要求:
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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},] |
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": { ... }} |
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原文地址:http://www.cnblogs.com/zl-py/p/5537618.html