Impossible to import spikinjelly - event based on Colab if no GPUs are available

[NicolaCST]

Issue type

• [ ] Bug Report
• [ ] Feature Request
• [x] Help wanted
• [ ] Other

SpikingJelly version latest

Description Hi, im currently using spikingjelly on Colab. If there are no GPUs available, it is impossible to use the latest version of this library. Without GPUs it is impossible to import the 'cupy' library, and as a consequence, it became impossible to use spikinjelly. However i can still use the old version, but i should modify a lot my code. Something i can do about that, or should i just avoid Colab ? @fangwei123456

Minimal code to reproduce the error/bug

import spikingjelly
from spikingjelly.clock_driven import neuron,encoding, functional, surrogate, layer

[fangwei123456]

It seems that you are using old version, rather than the latest version?

[NicolaCST]

Uhm that was a mistake by me, the actual module that i'm using is the activation_based..

import spikingjelly
from spikingjelly.activation_based import neuron, encoding, functional, surrogate, layer
from spikingjelly import visualizing

[fangwei123456]

OK, I will check if these codes will raise an error when cupy is not installed.

[fangwei123456]

I just fix this bug. You can use git pull to update SJ and reinstall it again.