Python 用于合并可变数量的嵌套字典的通用函数

我想做一个通用函数来合并python中的n个嵌套字典.

我创建了一个函数来合并三个字典，但我想将其推广到n个嵌套字典.

我创建的功能是:

def mergedicts(dict1, dict2, dict3):
for k in set(dict1.keys()).union(dict2.keys()).union(dict3.keys()):
    if k in dict1 and k in dict2 and k in dict3 :
        if isinstance(dict1[k], dict) and isinstance(dict2[k], dict) and isinstance(dict3[k], dict):
            yield (k, dict(mergedicts(dict1[k], dict2[k], dict3[k])))
        else:
            # If one of the values is not a dict, you can't continue merging it.
            # Value from first and second dict are written in form of lists.
            yield (k, [dict1[k],dict2[k], dict3[k]])
            # Alternatively, replace this with exception raiser to alert you of value conflicts
    elif k in dict1:
        yield (k, dict1[k])
    elif k in dict2:
      yield(k,dict2[k])
    else:
        yield (k, dict3[k]

dict1 = {"canada":{'america':189,'asia':175,'europe': 186},
     "norway":{'australia': 123,'africa':124,'brazil':125}}
dict2=  {"canada":{'america':13,'asia':14,'europe': 15},
     "norway":{'australia': 17,'africa':18,'brazil':19}}
dict3=  {"canada":{'america':127,'asia':256,'europe': 16},
     "norway":{'australia': 17,'africa':18,'brazil':19}}
# After running the above function I have got this output
{'canada': {'europe': [186, 15, 16], 'america': [189, 13, 127], 'asia': [175, 14, 256]}, 'norway': {'australia': [123, 17, 17], 'brazil': [125, 19, 19], 'africa': [124, 18, 18]}}

Is there any way to generalize the function so that I could merge n nested dictionaries in Python. (e.g. I may want to merge 20 nested dictionaries in python in a manner similar to the above, but my approach only allows for merging three nested dictionaries.)