Python--字典操作

print "*************字典操作****************"
dictory={"soyo":521,"hadoop":78,"Hbase":100}
print dictory["soyo"]
dictory["Hbase"]=101     #修改Key的值
print dictory["Hbase"]
print dictory
dictory["Spark"]=555     #没有key就新增加
print dictory
del dictory["hadoop"]     #删除指定key的键值对
print dictory    
print "************字典的遍历*************"
dictory2={"soyo1":521,"hadoops":78,"kafka":100}
keys=dictory2.keys()
print keys 
keys_s=list(keys)
print keys_s
keys_s.reverse()
print keys_s 
keys_s.sort()
print keys_s
print "将字典按照一定规则打印出来，通过改变Key的顺序，然后遍历字典"
for i in keys_s:
    print (i,"=>",dictory2[i])       

结果：

************字典的遍历*************
['hadoops', 'soyo1', 'kafka']
['hadoops', 'soyo1', 'kafka']
['kafka', 'soyo1', 'hadoops']
['hadoops', 'kafka', 'soyo1']
将字典按照一定规则打印出来，通过改变Key的顺序，然后遍历字典
('hadoops', '=>', 78)
('kafka', '=>', 100)
('soyo1', '=>', 521)