如何生成嵌套字典？

nested_dict = {
    'a': {
        'b': {
            'c': 1,
            'd': 2
        },
        'e': 3
    },
    'f': 4
}

data = [
    ('a', 'b', 'c', 1),
    ('a', 'b', 'd', 2),
    ('a', 'e', 3),
    ('f', 4)
]

nested_dict = {}

for keys, value in data:
    current_level = nested_dict
    for key in keys[:-1]:
        if key not in current_level:
            current_level[key] = {}
        current_level = current_level[key]
    current_level[keys[-1]] = value

print(nested_dict)

def build_nested_dict(keys, value):
    if len(keys) == 1:
        return {keys[0]: value}
    else:
        return {keys[0]: build_nested_dict(keys[1:], value)}

data = [
    (['a', 'b', 'c'], 1),
    (['a', 'b', 'd'], 2),
    (['a', 'e'], 3),
    (['f'], 4)
]

nested_dict = {}
for keys, value in data:
    nested_dict.update(build_nested_dict(keys, value))

print(nested_dict)