如何从Python3的子目录导入函数

我有一个项目,结构如下:

测试目录。 初始化 .py包含:

from . import TestSubDirFile

TestDir.TestSubDirFile.py包含:

class TestSubDirFile:
def test_funct(self):
    print("Hello World")

from TestDir import TestSubDirFile as tp

def test_job():
    testobj = tp.test_funct()
    print("Test job executed.")

if __name__ == "__main__":
     test_job()

获取输出为:

Traceback (most recent call last):
 File "C:/Python_Projects/Test/com/xyz/ds/ds_schedular.py", line 9, in <module>
test_job()
 File "C:/Python_Projects/Test/com/xyz/ds/ds_schedular.py", line 5, in test_job
testobj = tp.test_funct()
AttributeError: module 'TestDir.TestSubDirFile' has no attribute 'test_funct'