在子模块中导入子模块 - Python

Question

I am trying to import a submodule withing a seperate submodule using python. Here is my directory structure

I am trying to do this in process_qc.py

from package.database import database

d = database.Database('spark')
print(d.sparkSelect('SHOW DATABASES'))

It gives me error: ModuleNotFoundError: No module named 'package'

Answer 1

您可以尝试使用相对导入来执行此操作：

from ..database import database

Answer 2

Python does not know where package exists when you use an absolute import. This is because Python first looks in the built-in modules and then at directories listed in sys.path for the requested import. If the import is not found, the current working directory is prepended to sys.path .

To use absolute imports, you should either:

1. Execute the script from outside the package directory so that the package directory is discoverable from a path listed in sys.path .
2. Add the package directory to your PYTHONPATH :

$ export PYTHONPATH=$PYTHONPATH':path/to/package'