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>>> from app import db Traceback (most recent call last): File "<stdin>", line 1, in <module> ModuleNotFoundError: No module named 'app'

While running the code in terminal in python, after importing the db which is written inside my code through app, it was saying that the module is not found. Can any one help me out
> from app import db
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'app'

pyproj.database and pyproj.aoi import failed

I have installed the pyproj.2.6.1 version, and I am using the python3.8.8; I can't correctly import the module query_utm_crs_info from pyproj package.
Here below the code :
from pyproj import Proj, Transformer, CRS
from pyproj.database import query_utm_crs_info
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'pyproj.database'
Similar problem with AreaOfInterest
from pyproj.aoi import AreaOfInterest
and I received this message
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'pyproj.aoi'
However, if I change it in to
from pyproj.transformer import AreaOfInterest
Any suggestions ?

https://pyproj4.github.io/pyproj/stable/api/database.html#pyproj.database.query_crs_info
query_crs_info was added in pyproj 3.

Pyculib ImportError: cannot import name config

when trying to import pyculib I get ImportError: cannot import name config
I have tried pip installing and conda installing various versions of the cudatoolkit but none seem to work.
import pyculib
I get this error the first time I try to import pyculib
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/andillio/anaconda2/lib/python2.7/site-packages/pyculib/__init__.py", line 49, in <module>
from . import blas, sparse, fft, rand, sorting
File "/home/andillio/anaconda2/lib/python2.7/site-packages/pyculib/sorting/__init__.py", line 1, in <module>
from .radixsort import RadixSort
File "/home/andillio/anaconda2/lib/python2.7/site-packages/pyculib/sorting/radixsort.py", line 38, in <module>
lib = load_lib('radixsort')
File "/home/andillio/anaconda2/lib/python2.7/site-packages/pyculib/sorting/common.py", line 24, in load_lib
libpath = os.path.join(findlib.get_lib_dir(), fullname)
AttributeError: 'module' object has no attribute 'get_lib_dir'
and this error if I try a second time
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: No module named config

import matplotlib failed in Anaconda python3.6

I installed Anaconda to simplify the management of many python modules.
After that i tried to "import subprocess":
>>> import subprocess
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/sej/.config/anaconda3/lib/python3.6/subprocess.py", line 155, in <module>
_PopenSelector = selectors.SelectSelector
AttributeError: module 'selectors' has no attribute 'SelectSelector'
How to fix this?
I came accross this problem by trying to use matplotlib.
When trying to import it, this error comes up:
>>> import matplotlib
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/sej/.config/anaconda3/lib/python3.6/site-packages/matplotlib/__init__.py", line 127, in <module>
from matplotlib.compat import subprocess
File "/home/sej/.config/anaconda3/lib/python3.6/site-packages/matplotlib/compat/subprocess.py", line 27, in <module>
import subprocess
File "/home/sej/.config/anaconda3/lib/python3.6/subprocess.py", line 155, in <module>
_PopenSelector = selectors.SelectSelector
AttributeError: module 'selectors' has no attribute 'SelectSelector'

Error import six

I'm getting an error message while running python script. Below is the error message. Appreciate help to resolve the issue.
When I import "six.moves.http_client import HTTPConnection" it works, issue is when I import HTTPSConnection
>>> from six.moves.http_client import HTTPSConnection
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: cannot import name 'HTTPSConnection'
>>> from six.moves.http_client import HTTPSConnection
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: cannot import name 'HTTPSConnection'