python - 如何克服 "datetime.datetime not JSON serializable"？

Question

我有一个基本的字典如下:

sample = {}
sample['title'] = "String"
sample['somedate'] = somedatetimehere

当我尝试执行 jsonify(sample) 时，我得到:

TypeError: datetime.datetime(2012, 8, 8, 21, 46, 24, 862000) is not JSON serializable

我该怎么做才能使我的词典样本能够克服上述错误？

注意:虽然可能不相关，但字典是从 mongodb 中检索记录生成的，当我打印出 str(sample[ 'somedate'])，输出为 2012-08-08 21:46:24.862000。

Answer 1

我的快速而肮脏的 JSON 转储会吃掉日期和所有内容:

json.dumps(my_dictionary, indent=4, sort_keys=True, default=str)

default is a function applied to objects that aren't serializable.
In this case it's str, so it just converts everything it doesn't know to strings. Which is great for serialization but not so great when deserializing (hence the "quick & dirty") as anything might have been string-ified without warning, e.g. a function or numpy array.