Question

3.3. 二级子目录

test.py
dir
  |--subdir
    |-- b.py

neo@MacBook-Pro-Neo ~/workspace/devops % cat dir/subdir/b.py 
def sayhello():
    print("helloworld!!!")
    
neo@MacBook-Pro-Neo ~/workspace/devops % cat test.py
from dir.subdir import b 
b.sayhello()% 	

neo@MacBook-Pro-Neo ~/workspace/devops % python3 test.py 
helloworld!!!