Lightstreamer in Anaconda Python Distribution

[Kantor_Lek]

Thanks, I did a reinstall and got this:

Traceback (most recent call last):


File ~\anaconda3\envs\light_streamer\lib\site-packages\aiohttp\client_reqrep.py:70
import cchardet as chardet


ModuleNotFoundError: No module named 'cchardet'




During handling of the above exception, another exception occurred:


Traceback (most recent call last):


Cell In[2], line 1
from lightstreamer.client import *


File ~\anaconda3\envs\light_streamer\lib\site-packages\lightstreamer\client\__init__.py:2
from .ls_python_client_wrapper import *


File ~\anaconda3\envs\light_streamer\lib\site-packages\lightstreamer\client\ls_python_client_wra pper.py:2
from .ls_python_client_haxe import LSConsoleLoggerProvider, LSConsoleLogLevel, LSProxy, LSSubscription, LSConnectionDetails, LSConnectionOptions, LSLightstreamerClient


File ~\anaconda3\envs\light_streamer\lib\site-packages\lightstreamer\client\ls_python_client_hax e.py:10
from .com_lightstreamer_net import CookieHelper as com_lightstreamer_internal_CookieHelper


File ~\anaconda3\envs\light_streamer\lib\site-packages\lightstreamer\client\com_lightstreamer_ne t.py:1
import aiohttp


File ~\anaconda3\envs\light_streamer\lib\site-packages\aiohttp\__init__.py:6
from .client import (


File ~\anaconda3\envs\light_streamer\lib\site-packages\aiohttp\client.py:59
from .client_reqrep import (


File ~\anaconda3\envs\light_streamer\lib\site-packages\aiohttp\client_reqrep.py:72
import charset_normalizer as chardet # type: ignore[no-redef]


File ~\anaconda3\envs\light_streamer\lib\site-packages\charset_normalizer\__init__.py:23
from charset_normalizer.api import from_fp, from_path, from_bytes, normalize


File ~\anaconda3\envs\light_streamer\lib\site-packages\charset_normalizer\api.py:10
from charset_normalizer.md import mess_ratio


File charset_normalizer\md.py:5
from charset_normalizer.utils import is_punctuation, is_symbol, unicode_range, is_accentuated, is_latin, \


ImportError: cannot import name 'COMMON_SAFE_ASCII_CHARACTERS' from 'charset_normalizer.constant' (C:\Users\frank\anaconda3\envs\light_streamer\lib\ site-packages\charset_normalizer\constant.py)

[Alessandro Carioni]

It seems a problem related to aiohttp, a library used by the Lightstreamer Client to make http and websocket connections.
I really don’t know why it happens but you can try the workaround suggested in this SO post.