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标题: 求助！怎样理解字典的输出结果 [打印本页]

作者: hunsjie 时间: 2013-11-20 14:37
标题: 求助！怎样理解字典的输出结果
代码：

# create a mapping of state to abbreviation
states = {
'Oregon': 'OR',
'Florida': 'FL',
'California': 'CA',
'New York': 'NY',
'Michigan': 'MI'
}

# print every state abbreviation
print '-' * 10
for state, abbrev in states.items():
print "%s is abbreviated %s" % (state, abbrev)

结果：
California is abbreviated CAMichigan is abbreviated MINew York is abbreviated NYFlorida is abbreviated FLOregon is abbreviated OR

为何输出的顺序并不是按字典顺序呢？还是输出有某个规则？

作者: crossin先生 时间: 2013-11-20 19:54
字典是无序的，这点和list是不一样的。所以字典也不能直接用索引访问，只能通过key来访问

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