python包和文件夹的区别

#server.py

from package.modb import funb
from directory.moda import funa
funa()
funb()

import package.modb
import directory.moda
directory.moda.funa()
package.modb.funb()

python3中，有没有__init__.py文件程序都能正常导入运行

python2中，没有__init__.py的话则不能导入moda.py模块下的funa函数

提示找不到某块moda

Traceback (most recent call last):
  File "/Users/wangjinyu/PycharmProjects/work-practice/packagetest/server.py", line 2, in
    from directory.moda import funa
ImportError: No module named directory.moda

https://www.python.org/dev/peps/pep-0420/

https://stackoverflow.com/questions/57317624/difference-between-directory-and-python-package-in-pycharm