替换Python列表/字典中的值?

问题描述：

好吧，我正在尝试过滤传递给我的列表/字典，并对其进行清理"，因为其中有些特定的值我需要删除.

Ok, I am trying to filter a list/dictionary passed to me and "clean" it up a bit, as there are certain values in it that I need to get rid of.

所以，如果看起来像这样:

So, if it's looking like this:

"records": [{"key1": "AAA", "key2": "BBB", "key3": "CCC", "key4": "AAA"...}]

我该如何快速，轻松地完成所有操作，并将"AAA"的所有值替换为"XXX"?

How would I quickly and easily run through it all and replace all values of "AAA" with something like "XXX"?

重点在于速度和资源，因为这些可能很长，我不希望此过程浪费太多时间.

Focus is on speed and resources, as these may be long lists and I don't want this process to consume too much time.

答

DATA = {"records": [{"key1": "AAA", "key2": "BBB", "key3": "CCC", "key4": "AAA"}]}

for name, datalist in DATA.iteritems():  # Or items() in Python 3.x
    for datadict in datalist:
        for key, value in datadict.items():
            if value == "AAA":
                datadict[key] = "XXX"

print (DATA)
# Prints {'records': [{'key3': 'CCC', 'key2': 'BBB', 'key1': 'XXX', 'key4': 'XXX'}]}

替换Python列表/字典中的值?

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