[英]Merge dicts in a list in Python
假设我在 python 中有一个字典列表,如下所示:
[{"key": "a", "prop1": "alpha"}, {"key": "a", "prop2": "beta"}, {"key": "b", "prop1": "alpha"}]
我将如何合并 dicts 使列表变为:
[{"key": "a", "prop1": "alpha", "prop2": "beta"}, {"key": "b", "prop1": "alpha"}]
您可以使用dict.update
:
lst = [
{"key": "a", "prop1": "alpha"},
{"key": "a", "prop2": "beta"},
{"key": "b", "prop1": "alpha"},
]
out = {}
for d in lst:
out.setdefault(d["key"], {}).update(d)
print(list(out.values()))
印刷:
[{'key': 'a', 'prop1': 'alpha', 'prop2': 'beta'}, {'key': 'b', 'prop1': 'alpha'}]
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