itertools.groupby方法进行分组
- 分组前先排序
import itertools a = [ {"a": 1, "b": 2}, {"a": 2, "b": 4}, {"a": 1, "b": 8}, {"a": 3, "b": 5}, {"a": 1, "b": 1}, ] a.sort(key=lambda _: _.get("a")) print(a) gb = itertools.groupby(a, lambda i: i.get("a")) for i in gb: print(i) # 元组 for v in i[1]: print(v)
执行结果:
[{'a': 1, 'b': 2}, {'a': 1, 'b': 8}, {'a': 1, 'b': 1}, {'a': 2, 'b': 4}, {'a': 3, 'b': 5}] (1, <itertools._grouper object at 0x000001F3184EB250>) {'a': 1, 'b': 2} {'a': 1, 'b': 8} {'a': 1, 'b': 1} (2, <itertools._grouper object at 0x000001F3184EB220>) {'a': 2, 'b': 4} (3, <itertools._grouper object at 0x000001F3184EB250>) {'a': 3, 'b': 5}