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Where can I find WidgetRedirector in with Python3?

I was using a tkform(https://github.com/boscoh/tkform) with Python2 and it was working perfectly.
After switching to Python3, Im unable to run it, specifically the part:
from idlelib.WidgetRedirector import WidgetRedirector
It seems that WidgetRedirecor.py not even in the library (idellib) anymore...
Traceback (most recent call last):
File "/Users/igor/opt/cymorph3/runCyMorphGUI.py", line 7, in <module>
import tkform
File "gui/tkform.py", line 22, in <module>
from idlelib import WidgetRedirector
ImportError: cannot import name 'WidgetRedirector' from 'idlelib' (/Users/igor/opt/anaconda3/envs/cyMorph3/lib/python3.9/idlelib/__init__.py)
Can I fix it somehow?

Use:
from idlelib.redirector import WidgetRedirector

python wants an old version of the library, which I don't have, but I have a new one

I can't program in python at all. I'm just trying to run the grgsm (gnu radio gsm) program, which is written in python. I get following error:
Traceback (most recent call last):
File "/usr/lib/python3.8/site-packages/grgsm/__init__.py", line 48, in <module>
from .grgsm_swig import *
File "/usr/lib/python3.8/site-packages/grgsm/grgsm_swig.py", line 13, in <module>
from . import _grgsm_swig
ImportError: libboost_program_options.so.1.71.0: cannot open shared object file: No such file or directory
Traceback (most recent call last):
File "/usr/bin/grgsm_livemon", line 37, in <module>
from grgsm import arfcn
File "/usr/lib/python3.8/site-packages/grgsm/__init__.py", line 48, in <module>
from .grgsm_swig import *
File "/usr/lib/python3.8/site-packages/grgsm/grgsm_swig.py", line 13, in <module>
from . import _grgsm_swig
ImportError: libboost_program_options.so.1.71.0: cannot open shared object file: No such file or directory
From the above message, I concluded that in the 13th line of the file "/usr/lib/python3.8/site-packages/grgsm/grgsm_swig.py" there is an import of the file "libboost_program_options.so.1.71.0", which is missing. Well, but in the 13th line of this file there is nothing about it. It looks like this:
# This file was automatically generated by SWIG (http://www.swig.org).
# Version 4.0.1
#
# Do not make changes to this file unless you know what you are doing--modify
# the SWIG interface file instead.
from sys import version_info as _swig_python_version_info
if _swig_python_version_info < (2, 7, 0):
raise RuntimeError("Python 2.7 or later required")
# Import the low-level C/C++ module
if __package__ or "." in __name__:
from . import _grgsm_swig # 13th line
else:
import _grgsm_swig
try:
import builtins as __builtin__
except ImportError:
import __builtin__
I also don't know why python wants this version of boost. If I knew where it is imported, I would simply change it to libboost_program_options.so without the version suffix (because of course I have boost installed).

Solution can be found here. Generally, uninstall it and reinstall its dependencies in the correct order.

ImportError: cannot import name 'scan_videos' from 'subliminal'

I'm using the module subliminal to easily retrieve subtitles from the internet.
The CLI works perfectly, but I cannot import it as a module in a .py file.
The simplest code ever:
import os
from subliminal import scan_videos
videos = scan_videos('./')
print(videos)
And I always have this error:
Traceback (most recent call last):
File "subliminal.py", line 2, in <module>
from subliminal import scan_videos
File "/Users/louisbertin/Desktop/videos/subliminal.py", line 2, in <module>
from subliminal import scan_videos
ImportError: cannot import name 'scan_videos' from 'subliminal'
I don't know what I'm doing wrong. I had copy-pasted the code from the documentation:
https://github.com/Diaoul/subliminal

Seems like you called your script subliminal.py, which makes Python find it instead of the installed module. Rename the script and you should be fine.

Importing module item of subpackage from another subpackage

I have this project structure:
root_package/
root_package/packA/
root_package/packA/__init__.py (empty)
root_package/packA/moduleA.py
root_package/packB/__init__.py (empty)
root_package/packB/moduleB.py
root_package/rootModule.py
In the rootModule.py I have from packA.moduleA import ModuleAClass.
At the packA.moduleA.py I have this from root_package.packB.moduleB import ModuleBItem.
When running rootModule either via PyCharm or the terminal with python ./rootModule.py I am getting this error:
Was this the right way of importing?
Traceback (most recent call last):
File "/project_dir/rootPackage/rootModule.py", line 7, in <module>
from packA.moduleA import ModuleAClass
File "/project_dir/rootPackage/packA/moduleA.py", line 8, in <module>
from rootPackage.packB.moduleB import module_b_method
File "/project_dir/rootPackage/rootModule.py", line 7, in <module>
from packA.wavelet_compression import WaveletCompression
ImportError: cannot import name WaveletCompression
How to solve this?
Update 1
I've added a test file at the project_folder (not the root_package folder).
So the current directory structure is this:
project_folder/
project_folder/root_package/
project_folder/root_package/packA/
project_folder/root_package/packA/__init__.py (empty)
project_folder/root_package/packA/moduleA.py
project_folder/root_package/packB/__init__.py (empty)
project_folder/root_package/packB/moduleB.py
project_folder/root_package/rootModule.py
project_folder/test_rootModule.py
I haven't made the project_folder a package (no __init__.py file) since, the test_rootModule is simply a script to help me run the experiments.
So, in root_package/packA/moduleA.py, after changing the from root_package.packB.moduleB import ModuleBitem, to from packB.moduleB import ModuleBitem, as the answer suggests, it works.
But now there are two problems:
1. PyCharm doesn't agree with the change:
I cannot run my experiments from the project_folder/test_rootModule.py script.
I got this error:
Traceback (most recent call last):
File "project_folder/test_rootModule.py", line 8, in
from root_package.rootModule import rootModuleClass
File "project_folder/root_package/rootModule.py", line 7, in
from packA.moduleA import ModuleAClass
File "project_folder/root_package/packA/moduleA.py", line 8, in
from packB.moduleB import module_b_item
ImportError: No module named packB.moduleB
I cannot seem to get the 2nd Traceback to look like a code segment.
Update 2
What solved the problem was going to the Project: project_name > Project Structure dialog in PyCharm, selecting the root_package and then setting it as a Sources folder.
Now, I can run via the IDE both the rootModule and the test_rootModule.
Although, I cannot get to run the test_rootModule from the terminal.
The test_rootModule has these imports:
from root_package.rootModule import RootModuleClass
from root_package.packB.moduleB import module_b_item
I am at the project_folder dir, and run python ./test_rootModule.py and get this error:
Traceback (most recent call last):
File "./test_rootModule.py", line 8, in <module>
from root_package.rootModule import RootModuleClass
File "project_folder/root_package/rootModule.py", line 7, in <module>
from packA.moduleA import ModuleAClass
File "project_folder/root_package/packA/moduleA.py", line 8, in <module>
from packB.moduleB import module_b_item
ImportError: No module named packB.moduleB

If you are running all your code from within this path:
project_folder
Then you should ensure that all your modules that reside in root_package are referenced by that first. So for example:
from root_package.modA import foo

ImportError: cannot import name

For some reason I receive an ImportError every time I try to import a class from another file. Here's the github page for my project: https://github.com/wheelebin/mcnextbot
Here's the error that I'm receiving:
Traceback (most recent call last):
File "ircbot.py", line 36, in <module>
from test import mcnextlvl
ImportError: cannot import name mcnextlvl

Here your from test import something refers to the module test in <PYTHONPATH>/lib, not yourselves test.py, and there is no submodule/class mcnextlvl there. You should use from lib.test import mcnextlvl as #sgmart commented.

The __init__.py python file allow you can import your individual modules named 'test' from the lib package.