字典

1.

#使用键访问字典的值
student = {'name01':'yesheng','name02':'luomeng','name03':'lili'}
print(student['name02'])
print (student['name01'])

2.

#增加
student = {'name01':'yesheng','name02':'luomeng','name03':'lili'}
student['name04']= 'kejifeng'
print(student)

3.

#删除，使用del
student = {'name01':'yesheng','name02':'luomeng','name03':'lili'}
print ('删除前，%s'%student['name03'])
del student['name03']
print ('删除后，%s'%student['name03'])

4.

#删除，使用clear清空字典元素
student = {'name01':'yesheng','name02':'luomeng','name03':'lili'}
print ('清空前，%s'%student)
student.clear()
print ('清空后，%s'%student)