python无法导入模块

Question

I have my program set up using packages as followed:

-base
    -init.py
    -base_class.py
-test
    -init.py
    -test.py

When I do the import statement from base.base_class import BaseClass in the test.py I get this error when running it:

from base.base_class import BaseClass
ImportError: No module named base.base_class

How can I import this module?

Answer 1

at the top of test.py add

import sys
sys.path.append("..")

base is not a folder on the path...once you change this it should work

or put test.py in the same folder as base. or move base to somewhere that is on your path

Answer 2

你需要在你导入的每个文件夹中有一个__init__.py文件

Answer 3

您必须在 python 目录中创建一个名为“ __init__.py ”的文件，然后“Python”会将该目录理解为一个 Python 包。

Answer 4

there are 3 things you can do:

add an init.py file to each folder

add sys.path.append("Folder") to the top

or use imp and do;

import imp
foo = imp.load_source('filename', 'File\Directory\filename.py')

then foo will be the name of the module for example foo.method()