scores = {'语文':89}#{'语文': 89}
print(scores)
#通过key访问value
print(scores['语文'])
#对不存在的key赋值，就是增加key-value对
scores['数学'] = 93
scores[92] = 5.7
print(scores)#{'语文': 89, '数学': 93, 92: 5.7}
#如果要删除字典中的key-value对，则可使用del语句
del scores['语文']
del scores['数学']
print(scores)#{92: 5.7}
cars = {'BMW':8.5,'BENS':8.3,'AUDI':7.9}
cars['BENS'] = 4.3
cars['AUDI'] = 66
print(cars)#{'BMW': 8.5, 'BENS': 4.3, 'AUDI': 66}
#判断cars是否包含名为AUDI的key
print('AUDI' in cars)
#判断cars是否包含名为p的key
print('p' in cars)
# True
# False
print('LAMBORGHINI' not in cars)
