Json dump中sort_keys的輸出

1. Key是文本的時候，如果sort_keys是False，則隨機打印結果，如果sortkeys為true，則按順序打印

2. Key是數字，則無論sort_keys為啥，都按順序打印。

3. Key為文本和數字交加的時候，等同於文本。

>>> print json.dumps({"A": 5, "F": 8, "D": 7, "C": 9 }, sort_keys=False,indent=4, separators=(',', ':'))
{
"A":5,
"C":9,
"D":7,
"F":8
}
>>>
>>> print json.dumps({"A": 5, "F": 8, "D": 7, "C": 9 }, sort_keys=True,indent=4, separators=(',', ':'))
{
"A":5,
"C":9,
"D":7,
"F":8
}
>>>
>>> print json.dumps({"3": 5, "5": 8, "4": 7, "2": 9 }, sort_keys=False,indent=4, separators=(',', ':'))
{
"3":5,
"2":9,
"5":8,
"4":7
}
>>>
>>> print json.dumps({"3": 5, "5": 8, "4": 7, "2": 9 }, sort_keys=True,indent=4, separators=(',', ':'))
{
"2":9,
"3":5,
"4":7,
"5":8
}
>>>
>>> print json.dumps({3: 5, 5: 8, 4: 7, 2: 9 }, sort_keys=False,indent=4, separators=(',', ':'))
{
"2":9,
"3":5,
"4":7,
"5":8
}
>>>
>>> print json.dumps({3: 5, 5: 8, 4: 7, 2: 9 }, sort_keys=True,indent=4, separators=(',', ':'))
{
"2":9,
"3":5,
"4":7,
"5":8
}
>>>