mod_b.py

from a.sub_a import mod_a

mod_a.sample()

尝试从mod_b在终端中运行Python文件，出现以下错误：

(base) C:\Users\%%\Desktop\python-test>C:/Users/%%/AppData/Local/Continuum/anaconda3/python.exe c:/Users/%%/Desktop/python-test/a/sub_b/mod_b.py
Traceback (most recent call last):
  File "c:/Users/%%/Desktop/python-test/a/sub_b/mod_b.py",line 1,in <module>
    from a.sub_a import mod_a
ModuleNotFoundError: No module named 'a'