Spyder 5.1.5 debugging does not work in new environnements (Anaconda3-2021.11-Windows-x86_64.exe)

Hello, First thanks for the excellent work of the contributors!

Anaconda3-2021.11-Windows-x86_64.exe Windows 10

In the context of specific development, after reinstallation of anaconda, I am facing a problem with spyder that I reproduce here in a simpler situation.

I have installed anaconda from Anaconda3-2021.11-Windows-x86_64.exe on Windows 10. The base environment has spyder 5.1.5 installed. I have written a few line script importing numpy (1.20.3) and matplotlib (3.4.3), with a breakpoint (at “x=”).

import numpy as np
import matplotlib.pyplot as plt
if __name__ == '__main__':
	x=np.linspace(1,10,10)
	plt.hist(x**2)

The script runs, debugging works fine. Same after conda update --all.

I create an environment either from the Navigator or by hand from a conda shell (conda env create –n test_from_shell, that then appears in the Navigator).

In both created environments I install spyder (conda install spyder, and spyder 5.1.5 gets installed, like in the base), numpy (1.21.5) and matplotlib (3.5.0), not the same version. spyder-kernels version is 2.1.3 in all cases, ipykernel versions are the same.

In the created environment the script runs correctly, but the debugging does not work, i.e. it starts, does not stop at nor reach the breakpoint and cannot be interrupted. The symptoms are the same as in issue #17314, and the steps are similar to the ones described in the attached pdf of that issue (C__Users_jandre_Desktop_Problem_20220208_1900.pdf

I have cloned the base environment through a yaml file and I have checked that in the cloned environment the script and the debugging run fine.

1. What is/are the guilty module(s) in the test environments leading to the debugger bug ? How can I find it ? How can this be solved?

2. Could you explain what are the default scripts installed when a new environment is created and why it is not the ones found in the base environment ? Is that expected ?

Thanks a lot

[kikazahn]

This worked for me. To avoid conflicts I had to do conda uninstall spyder spyder-kernels in my old environment Also install spyder-kernels from conda-forge: conda install spyder-kernels -c conda-forge Otherwise spyder-kernels 2.2.0 will be installed and they are incompatible with spyder 5.2.2

[Davo36]

@ccordoba12 Yes I just installed the stand alone version, I’m using Windows. It works fine. Thanks.