即使导入成功，Python也找不到类

Question

I have some folder: /home/tom/my_module .
In my_module directory I have:
__init__.py (empty file)
my_class.py

class HelloWorldExample(object):
    @staticmethod
    def someMethod():
      print("test")

Now, let's go into terminal terminal:

cd ~ python

And then, in python shell:
import my_module succedeed. However, I can't type something like:
x= HelloWorldExample()
nor
HelloWorldExample.someMethod() because python can't find this class.
Any ideas?

Answer 1

When doing import my_module you're importing the module and it will be available as my_module .

If you want to access something defined in your module you will need to access it on the module ex: my_module.thing_in_my_module .

In your example that would translate to:

import my_module

x = my_module.HelloWorldExample()

But you could also do:

from my module import HelloWorldExample

x = HelloWorldExample()

This imports the class directly rather than the module.

See https://docs.python.org/3/tutorial/modules.html#packages for more information on packages and imports.