Python无法导入包

Question

I have a package structure like:

thePackage/
    __init__.py
    moduleA.py
    moduleB.py
    moduleC.py

The __init__.py file contains

from . import moduleA

For simplicity I cd into the directory containing the foler thePackage .

When I try to import thePackage I get the error:

Traceback (most recent call last):

  File "<ipython-input-10-5fe9a18b3124>", line 1, in <module>
import thePackage

  File "C:\thePackage\__init__.py", line 2, in <module>
from . import moduleA

ImportError: cannot import name 'moduleA'

I've read a few posts like Importing packages in Python , but still can't figure out my problem. The accepted answer in that post suggests I should be able to import the submodule moduleA by import thePackage.moduleA , but when I try this I get the exact same error.

How can I important the package thePackage?

Also, how can I just import moduleA?

Answer 1

from thePackage import moduleA

Answer 2

I encountered the issue while using Spyder and Python3.4 .

When I closed and restarted Spyder , I was able to import the package using import thePackage , and I was able to import moduleA using import thePackage.moduleA .

Also, originally when I first tried to import the module using import thePackage , it failed. At this point I might have modified and saved the __init__.py . Then I probably tried to import the module again using import thePackage , but maybe this doesn't always try to import the newly saved versions of thePackage . Thus, I recommend trying

import importlib
importlib.reload(thePackage)

to force the import of the newly saved version of thePackage .

Answer 3

you could try

    sudo apt-get install python-setuptools

found it at https://bitbucket.org/pypa/setuptools/issues/368/module-object-has-no-attribute-packaging , and it helped me when I was having challenges installing pyttsx,