from fib import fibonacci 从fibonacci模块中导入fib函数
from package_runoob.runoob1 import runoob1 从包package_runoob中的模块runoob1中导入函数runoob1
from fib import fibonacci 从fibonacci模块中导入fib函数
from package_runoob.runoob1 import runoob1 从包package_runoob中的模块runoob1中导入函数runoob1