TypeError: in interactiveshell.py, InteractiveShell class, line 331

[manish-abio]

Errror:

"/home/ec2-user/anaconda3/envs/JupyterSystemEnv/lib/python3.10/site-packages/IPython/core/interactiveshell.py", line 331, in InteractiveShell
ast_transformers: List[ast.NodeTransformer] = List(
TypeError: 'type' object is not subscriptable

Solution:

Line 331 should be changed to:
ast_transformers: List = List(

[DrManishSharma]

Added a pull request #14359

[krassowski]

@manish-abio @DrManishSharma this issue looks like a duplicate of #14352 which was fixed in #14353 and released in 8.22.1; you are most likely either running 8.22.0 rather than patched 8.22.1, or have incompatible version of traitlets installed.

[RobChad]

I'm running a freshly installed 8.22.2 with this issue
downgrading to 8.22.1, I still have this issue
8.21.0 works

I'm on python 3.10.13

[AntoineHus]

Hello,

I have the "TypeError: type 'List' is not subscriptable" on Python 3.11 with sage 10.3 when I tried to launch It interactive on the CLI.

File "/private/var/tmp/sage-10.3-current/local/var/lib/sage/venv-python3.11.8/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 331, in InteractiveShell
ast_transformers: List[ast.NodeTransformer] = List(
~~~~^^^^^^^^^^^^^^^^^^^^^

[krassowski]

@RobChad @AntoineHus you need to upgrade traitlets to v5.13 or newer. The pin was added in #14353 but your solver (whichever way you installed IPython may not have picked the correct version). I will close this issue as a duplicate, but if you still experience the problem with the required version of traitlets installed feel free to ask for help (the issue may be that you have two versions installed, for example if mixing pip and conda).