如何在python中将嵌套字典(无循环)的字符串创建为其相应树的一系列分支

def create_tree(dictionary):
    tree = {}
    for key, value in dictionary.items():
        if isinstance(value, dict):
            tree[key] = create_tree(value)
        else:
            tree[key] = value
    return tree

def print_tree(tree, indent=0):
    for key, value in tree.items():
        if isinstance(value, dict):
            print(' ' * indent + str(key))
            print_tree(value, indent + 4)
        else:
            print(' ' * indent + str(key) + ': ' + str(value))

nested_dict_str = '{"A": {"B": {"C": "Value C", "D": "Value D"}, "E": "Value E"}, "F": "Value F"}'
nested_dict = eval(nested_dict_str)  # 将字符串转换为字典

tree = create_tree(nested_dict)
print_tree(tree)

A
    B
        C: Value C
        D: Value D
    E: Value E
F: Value F