Python3.7--数据结构--字典Dist

学习字典；

• 创建字典，
• 删除某一项，
• 增加某一项，
• 遍历字典并演示；
• 查找字典是否有存在这个值；

# 学习字典；创建字典，删除某一项，增加某一项，遍历字典并演示；查找字典是否有存在这个值；
# 'ab'是地址（Address）簿（book)的缩写

ab = {
    'Swaroop' :'[email protected]',
    'Larry' :'[email protected]',
    'Matsumoto':'[email protected]',
    'Spammer' : '[email protected]'
    }

print("Swaroop's address is",ab['Swaroop'] )

#删除一对键值
del ab['Spammer']

print('\n There are {} contacts in the address-book \n'.format(len(ab)))

for name,address in  ab.items():
    print('Contace {} at {}'.format(name,address))

#添加一组
ab['Guido'] = '[email protected]'

if 'Guido' in ab:
    print("\nGuido's address is ",ab['Guido'])