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cant't use package internals

Andrej Viktorovich wrote:

> Hello,
> I have Python package tst in my workspace.
> tst has files:
> __init__.py
> tst.py
> content of __init__.py:
> print("importing Tst")
> content of tst.py:
> class Tst:
>     def __init__(self):
>         print("init Tst")
> I run python console in workspace directory. I do
>>>>import tst
> Run without errors. I was expected "importing Tst" to be printed, but
> nothing happened. Why?

You may have a second tst.py, e. g. in your working directory, that is found 
first and thus shadows the tst package. A variant of that explanation would 
be that the tst folder is your working directory and you are importing the 
tst submodule directly instead as part of a package. 

In the interactive interpreter you can use the tst.__file__ attribute to 
find out what is actually going on.

To make things a bit clearer I recommend that you give package and submodule 
different names, at least while you are experimenting.

> I run
> t=tst.tst.Tst()
> and got error:
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> AttributeError: module 'tst' has no attribute 'tst'
> Wh it not finds Tst class?

Submodules of a package are not imported automatically.
You need

import tst.tst
t = tst.tst.Tst()