可以将defaultdict与frozenset一起使用

from collections import defaultdict

group_dict = defaultdict(dict)

for record in my_list:
    key = frozenset(record['metric'].items())
    for x, y in record['values']:
        group_dict[key][x] = group_dict[key].setdefault(x, 0) + int(y)
        
res = [{'metrics': dict(k), 'values': [[k, str(vv)] for k, vv in v.items()]} for k, v in group_dict.items()]

print(res)

• • 输出：**

[{'metrics': {'account': '1', 'email_domain': 'gmail.com', 'version': 'a'},
  'values': [[1671256800, '200'], [1671260400, '200']]},
 {'metrics': {'account': '1', 'email_domain': 'gmail.com', 'version': 'b'},
  'values': [[1671256800, '600'], [1671260400, '600']]}]

给你

import pandas as pd

my_list = [
{'metric': {'account': '1', 'email_domain': 'gmail.com', 'version': 'a'}, 
 'values': [[1671256800, '100'], [1671260400, '100']]},
{'metric': {'account': '1', 'email_domain': 'gmail.com', 'version': 'a'}, 
 'values': [[1671256800, '100'], [1671260400, '100']]},
{'metric': {'account': '1', 'email_domain': 'gmail.com', 'version': 'b'}, 
 'values': [[1671256800, '300'], [1671260400, '300']]},
{'metric': {'account': '1', 'email_domain': 'gmail.com', 'version': 'b'}, 
 'values': [[1671256800, '300'], [1671260400, '300']]}]

my_new_list = {}
for i in my_list:
    version = i['metric']['version']
    if version not in my_new_list:
        my_new_list[version] = i
    else:
        my_new_list[version]['values']+=i['values']
        df = pd.DataFrame(my_new_list[version]['values'])
        df[1] = df[1].apply(lambda x:int(x))
        df = df.groupby(0)[1].sum().reset_index().values.tolist()
        my_new_list[version]['values'] = df

output = list(my_new_list.values())
print(output)

试试看：

from collections import Counter

out = {}
for d in my_list:
    a, e, vr = (
        d["metric"]["account"],
        d["metric"]["email_domain"],
        d["metric"]["version"],
    )

    for t, v in d["values"]:
        out.setdefault((a, e, vr), Counter())[t] += int(v)

out = [
    {
        "metric": {"account": a, "email_domain": e, "version": vr},
        "values": [[kk, str(vv)] for kk, vv in v.items()],
    }
    for (a, e, vr), v in out.items()
]

print(out)

图纸：

[
    {
        "metric": {"account": "1", "email_domain": "gmail.com", "version": "a"},
        "values": [[1671256800, "200"], [1671260400, "200"]],
    },
    {
        "metric": {"account": "1", "email_domain": "gmail.com", "version": "b"},
        "values": [[1671256800, "600"], [1671260400, "600"]],
    },
]