2017.7.7

1.1字典的用法

sarah = []sarahDic = {}sarah = dataHandle2.readDataFromFile('sarah2.txt')sarahDic['Name'] = sarah.pop(0)sarahDic['Dob'] = sarah.pop(0)sarahDic['runtimes'] = sarahprint(sarahDic['Name'] + "'s fatest times are:" + str(sorted(set(dataHandle2.sanitize(t) for t in sarahDic['runtimes']))[0:3]))

字典相较于列表，就是在列表的一些属性上，加上其称号。字典可以随着其加入的值动态扩大

2.关于类的继承

# auth = 'gao'# encoding: utf-8import dataHandle2class AthleteList(list):    def __init__(self, a_name, a_dob=None, a_times=[]):        list.__init__([])        self.name = a_name        self.dob = a_dob        self.extend(a_times)    def top3(self):        return (sorted(set(dataHandle2.sanitize(t) for t in self))[0:3])

继承list的类，拥有list的所有共有方法和属性

3.对类的应用

sarah = dataHandle2.readDataFromFile('sarah2.txt')print(sarah.name + "'s fatest times are:" + str(sarah.top3()))sarah.append('2.09')print(sarah.top3())

所有类的方法都可以被类的实例调用
4.point

5.一个关于python字符串的处理，2和3都能用

6.一个枚举函数enumerate（），返回列表的位置和列表值

animals = ['cat', 'dog', 'monkey']for idx, animal in enumerate(animals):    print('#%d: %s' % (idx + 1, animal))# Prints "#1: cat", "#2: dog", "#3: monkey", each on its own line

7.访问字典dict中的键值对：d.item()

d = {'person': 2, 'cat': 4, 'spider': 8}for animal, legs in d.items():    print('A %s has %d legs' % (animal, legs))# Prints "A person has 2 legs", "A cat has 4 legs", "A spider has 8 legs"

今天就到这，吃饭去