1.要创建字典并记录其中的键值对的添加顺序，可使用collections 中的 OrderedDict  模块   

from collections import OrderedDict

favourite_languages = OrderedDict()

favourite_languages['jen'] = 'python'

favourite_languages['sarah'] = 'C'

for name,language in favourite_languages.items():

print(name.title() + "'s favourite languages is " + language.title() + '.')

 

2.random随机函数

from random import randint

x = randint(1,6)

print (x)                          随机出现1-6 之间的一个数字