utils.py 文件源码

def merge_dicts(d1: dict, d2: dict) -> dict:
    """
    Update two dicts of dicts recursively,
    if either mapping has leaves that are non-dicts,
    the second's leaf overwrites the first's.
    """
    # in Python 2, use .iteritems()!
    for k, v in d1.items():
        if k in d2:
            # this next check is the only difference!
            if all(isinstance(e, MutableMapping) for e in (v, d2[k])):
                d2[k] = merge_dicts(v, d2[k])
            if isinstance(v, list):
                d2[k].extend(v)
            # we could further check types and merge as appropriate here.
    d3 = d1.copy()
    d3.update(d2)
    return d3