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PyTouchBar: no module named Foundation

I installed PyTouchBar using pip3
When I tried to import it, however, it gives me this error.
$ python3
>>> import PyTouchBar
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyTouchBar/__init__.py", line 5, in <module>
from .TouchBar import *
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/PyTouchBar/TouchBar.py", line 13, in <module>
from Foundation import *
ModuleNotFoundError: No module named 'Foundation'
On Python 2, Foundation works perfectly, by the way.
Could someone tell me how to fix this? Thanks in advance!

I think your problem could be one of these:
You installed PyTouchBar on python2 instead of python3, in which case you have to use:
pip3 install PyTouchBar
You are using a venv and installed from the terminal/command line instead of the venv's terminal
PyTouchBar uses foundation that you have to install separately

Why can't I install pyler module?

I get an error while I try to import the pyler module in python. I have uninstalled and then installed the module many times, and also with the .whl file, but still only the info file is generated.
import pyler
When I write this, I get
Traceback (most recent call last): File "c:\Users\USER\Documents\Tanav\VsCode\tut1\Python proj\smth.py", line 1, in <module> import pyler ModuleNotFoundError: No module named 'pyler'
I use python version 3.8.5 on windows 10 64-bit machine.
Please help

ImportError igraph: undefined symbol

After installing python-igraph with pip, I still can't import it. I've encountered such error around the internet but most solutions I've found were about reinstalling the module, which I already did. Any suggestions on how to fix this would be greatly appreciated. Thanks
>>> import igraph
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/lib/python3.5/site-packages/igraph/__init__.py", line 34, in <module>
from igraph._igraph import *
ImportError: /usr/lib/python3.5/site-packages/igraph/_igraph.cpython-35m-x86_64-linux-gnu.so: undefined symbol: _ZTVN10__cxxabiv121__vmi_class_type_infoE

Uninstalling everything through pip and then installing python-igraph community repo package for arch linux did it. Didn't realize there was one. Suggested by Tamás.

Import cv2 error python

Whenever I attempt to import cv2, I always get this error
import cv2
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: /usr/lib/libgdal.so.1: undefined symbol: sqlite3_column_table_name
I've already created a symbolic link and I have also already installed the libgdal-dev module from the Ubuntu Software Center. Any ideas? Thanks!
EDIT: I did as pbu suggested, and the link was created without fail for the most part. But now, this error comes up:
import cv2
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: /usr/local/lib/libgdal.so.1: cannot read file data: Is a directory
Thank you all for your suggestions!

was happen same with me , resolved after :
GDAL 2.1 is available for Ubuntu 16.04 from the UbuntuGIS-Unstable PPA
sudo apt install gdal-bin python-gdal python3-gdal

Ropevim error in mac os 10.8.4

I use ropevim perfectly in Ubuntu system,
but i got lots of lots error.
i use homebrew to install macvim and python
and follow the tutorial.
http://wizardmode.com/2012/07/mountain-lion-and-homebrew-vim-importerror-no-module-named-site/
I wander know is the ropevim are very buggy or not practical in mac os system.
because the discussion is not popular?
or is there any better solution in vim for Python on mac os?
Thanks very much...it's annoying me lots of time
>>> import rope
>>> import ropevim
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/ropevim-0.3_rc-py2.7.egg/ropevim.py", line 10, in <module>
import vim
ImportError: No module named vim
and when I put the ropevim.vim in .vim/plugin
I will got the error when using vim
/install/ropehg/ropemode:vim la
Error detected while processing function LoadRope:
line 3:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/pyt
hon2.7/site-packages/ropevim-0.3_rc-py2.7.egg/ropevim.py", line 3, in <module>
import tempfile
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/pyt
hon2.7/tempfile.py", line 32, in <module>
import io as _io
File "/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/pyt
hon2.7/io.py", line 51, in <module>
import _io
ImportError: dlopen(/usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions
/2.7/lib/python2.7/lib-dynload/_io.so, 2): Symbol not found: __PyInt_AsInt
Referenced from: /usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/
2.7/lib/python2.7/lib-dynload/_io.so
Expected in: flat namespace
in /usr/local/Cellar/python/2.7.5/Frameworks/Python.framework/Versions/2.7/lib/python2
.7/lib-dynload/_io.so

I encountered a very similar stack trace when setting up some vim extensions from this page http://sontek.net/blog/detail/turning-vim-into-a-modern-python-ide
I believe the problem comes from incompatibilities between 'macport' and native python libraries, and that the native version of vim tries to pull from both.
I ultimately resolved my problem by using macport to install vim with python27 variant.
sudo port install vim +python27
The default configuration of macport's vim is without 'python' enabled.