如何打印嵌套词典？

def print_nested_dict(nested_dict):
    for key, value in nested_dict.items():
        if isinstance(value, dict):
            print_nested_dict(value)
        else:
            print(f"{key}: {value}")

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

print_nested_dict(nested_dict)

a: 1
c: 2
e: 3
f: 4