分享程序员开发的那些事...
更新时间：2021-12-13 10:46:26
如果将app/server.py作为脚本运行，则app的父目录不会添加到sys.path().而是添加app目录本身(不是作为软件包，而是作为导入搜索路径).
If you are running app/server.py as a script, the parent directory of app is not added to sys.path(). The app directory itself is added instead (not as a package but as a import search path).
您有4个选择:
server.py 移出app程序包(在其旁边)在仅运行的app旁边添加一个新的脚本文件:
server.py out of the app package (next to it)Add a new script file next to app that only runs:
from app import server
server.main()
使用 -m开关选项运行 module 作为主要入口点:
Use the -m switch option to run a module as the main entry point:
python -m app.server
将server.py的父目录添加到sys.path:
Add the parent directory of server.py to sys.path:
import os.path
import sys
parent = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.insert(0, parent)
这最后一个选项可能会带来更多问题；现在app软件包和app软件包中 中包含的模块都在sys.path上.您可以同时导入app.server和server，Python将把它们看作两个独立的模块，每个模块在sys.modules中都有自己的条目，并带有各自的全局变量的单独副本.
This last option can introduce more problems however; now both the app package and the modules contained in the app package are on sys.path. You can import both app.server and server and Python will see these as two separate modules, each with their own entry in sys.modules, with separate copies of their globals.