Develop Reference

Cannot able to run cqlsh due to python attribute error

Cannot able to execute the command cqlsh in mac m1 based system.
% bin/cqlsh
Traceback (most recent call last):
File "/Users/avinashkasukurthi/devtools/apache-cassandra-4.0.7/bin/cqlsh.py", line 159, in <module>
from cqlshlib import cql3handling, cqlhandling, pylexotron, sslhandling, cqlshhandling
File "/Users/avinashkasukurthi/devtools/apache-cassandra-4.0.7/bin/../pylib/cqlshlib/cql3handling.py", line 19, in <module>
from cqlshlib.cqlhandling import CqlParsingRuleSet, Hint
File "/Users/avinashkasukurthi/devtools/apache-cassandra-4.0.7/bin/../pylib/cqlshlib/cqlhandling.py", line 23, in <module>
from cqlshlib import pylexotron, util
File "/Users/avinashkasukurthi/devtools/apache-cassandra-4.0.7/bin/../pylib/cqlshlib/pylexotron.py", line 342, in <module>
class ParsingRuleSet:
File "/Users/avinashkasukurthi/devtools/apache-cassandra-4.0.7/bin/../pylib/cqlshlib/pylexotron.py", line 343, in ParsingRuleSet
RuleSpecScanner = SaferScanner([
^^^^^^^^^^^^^^
File "/Users/avinashkasukurthi/devtools/apache-cassandra-4.0.7/bin/../pylib/cqlshlib/saferscanner.py", line 91, in __init__
s = re.sre_parse.State()
^^^^^^^^^^^^
AttributeError: module 're' has no attribute 'sre_parse'

Looks like there may have been a breaking change introduced to Python's synchronized regex engine (SRE) with Python 3.11. I have created a ticket for this on the Cassandra project (CASSANDRA-18088).
In the interim, downgrade your local Python to 3.10, and you should be fine.

Keep getting ModuleNotFoundError: No module named 'lib.cogs' error when trying to run my bot on an ubuntu server

Is this a code error, or something i forgot to install? Please help thank you!
Exact error:
Traceback (most recent call last):
File "launcher.py", line 5, in <module>
bot.run(VERSION)
File "/root/doob/lib/bot/__init__.py", line 61, in run
self.setup()
File "/root/doob/lib/bot/__init__.py", line 47, in setup
self.load_extension(f"lib.cogs.{cog}")
File "/usr/local/lib/python3.8/dist-packages/discord/ext/commands/bot.py", line 660, in load_extension
spec = importlib.util.find_spec(name)
File "/usr/lib/python3.8/importlib/util.py", line 94, in find_spec
parent = __import__(parent_name, fromlist=['__path__'])
ModuleNotFoundError: No module named 'lib.cogs.'

In your setup function you have f"lib.cogs.{cog}", but cog is an empty string or something, so its trying to essentially import lib.cogs. which is not a valid module / does not exist and is causing your error.

it's because file structures work different on linux than Windows.
(how i fixed it, https://stackoverflow.com/a/63931191/12388205)

nrfutil changes python version mid-script

I'm using nrfutil in a shell script. It's failing with this error:
Traceback (most recent call last):
File "/usr/local/bin/nrfutil", line 6, in <module>
from nordicsemi.__main__ import cli
File "/Library/Python/2.7/site-packages/nordicsemi/__main__.py", line 57, in <module>
from nordicsemi.zigbee.prod_config import ProductionConfig, ProductionConfigWrongException, ProductionConfigTooLargeException
File "/Library/Python/2.7/site-packages/nordicsemi/zigbee/prod_config.py", line 41, in <module>
import yaml
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/yaml/__init__.py", line 374
class YAMLObject(metaclass=YAMLObjectMetaclass):
It's starting in python 2.7, then it looks like its running "import yaml" from a 3.6 library.
Why would it do this? How do I prevent it?
Thanks

I had an old version of nrfutil. I upgraded, all is good

cannot launch Jupyter from anaconda

I just got a new laptop at work and installed anaconda.. howerver, when i launched Jupyter I received the following error. Does anyone know what i should do here? Cheers
Traceback (most recent call last):
File "C:\Users\darren.chapman\AppData\Local\Continuum\anaconda3\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 9, in
import sqlite3
File "C:\Users\darren.chapman\AppData\Local\Continuum\anaconda3\lib\sqlite3\__init__.py", line 23, in
from sqlite3.dbapi2 import *
File "C:\Users\darren.chapman\AppData\Local\Continuum\anaconda3\lib\sqlite3\dbapi2.py", line 27, in
from _sqlite3 import *
ImportError: DLL load failed: The specified procedure could not be found.
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\darren.chapman\AppData\Local\Continuum\anaconda3\Scripts\jupyter-notebook-script.py", line 6, in
from notebook.notebookapp import main
File "C:\Users\darren.chapman\AppData\Local\Continuum\anaconda3\lib\site-packages\notebook\notebookapp.py", line 86, in
from .services.sessions.sessionmanager import SessionManager
File "C:\Users\darren.chapman\AppData\Local\Continuum\anaconda3\lib\site-packages\notebook\services\sessions\sessionmanager.py", line 12, in
from pysqlite2 import dbapi2 as sqlite3
ModuleNotFoundError: No module named 'pysqlite2'

You have to add the path.
while installing click the add anoconda to the path.

ImportError: DLL load failed: The specified module could not be found

I have created a python application using py2exe. when i run this exe/application on my build environment, it works properly. But when i try to run it on clean machine, it gives me a error that,
Traceback (most recent call last):
File "wx\_misc.pyc", line 1358, in Notify
File "wx\_core.pyc", line 14771, in Notify
File "invesalius.py", line 174, in Startup
File "gui\frame.pyc", line 30, in <module>
File "constants.pyc", line 25, in <module>
File "project.pyc", line 31, in <module>
File "vtk\__init__.pyc", line 43, in <module>
File "vtkIOPython.pyc", line 12, in <module>
File "vtkIOPython.pyc", line 10, in __load
ImportError: DLL load failed: The specified module could not be
found.
Traceback (most recent call last):
File "wx\_misc.pyc", line 1358, in Notify
File "wx\_core.pyc", line 14771, in Notify
File "invesalius.py", line 82, in Startup2
AttributeError: 'SplashScreen' object has no attribute 'control'
Traceback (most recent call last):
File "invesalius.py", line 197, in OnClose
AttributeError: 'SplashScreen' object has no attribute 'fc'
I am using:
1. windows 8.1 RTM(64 bit)
2. python (2.7 amd64)
3. py2exe (0.6.10a1)
Any comments will be greatly appreciated...

Sounds like you need a python runtime on the target machine. Does the error message give you any more information about the missing DLL? If there is no further information, there is a Dependency Walker program (depends.exe) that may help you identify the missing dll.