从文本文件创建深度嵌套的字典

def create_nested_dict_from_text_file(file_path):
    nested_dict = {}
    with open(file_path, 'r') as file:
        lines = file.readlines()
        for line in lines:
            # 解析每一行的内容
            key, value = line.strip().split(':')
            
            # 将解析后的内容逐层嵌套到字典中
            keys = key.split('.')
            current_dict = nested_dict
            for k in keys[:-1]:
                if k not in current_dict:
                    current_dict[k] = {}
                current_dict = current_dict[k]
            current_dict[keys[-1]] = value
    
    return nested_dict

# 示例文本文件内容：
# key1.key2.key3:value1
# key1.key2.key4:value2
# key1.key5:value3

file_path = 'example.txt'
nested_dict = create_nested_dict_from_text_file(file_path)
print(nested_dict)

{
    'key1': {
        'key2': {
            'key3': 'value1',
            'key4': 'value2'
        },
        'key5': 'value3'
    }
}